Trabajos python developer en Reino Unido

Senior Python Quant Developer London (Hybrid) The company A growing fintech business building advanced analytics and execution technology for institutional clients across the derivatives space. Their platform is used by leading hedge funds and asset managers to support relative value, volatility, and macro trading strategies. The environment combines strong engineering standards with close interaction between trading, research, and technology teams. The role This is a senior engineering technology role focused on the core analytics platform that underpins pricing, screening, and execution workflows. You’ll play a key part in designing and evolving production systems used by traders, quants, and portfolio managers, with ownership across reliability, scalability, and performance. The role would suit someone with strong platform engineering instincts who enjoys building robust systems in fast-moving trading environments. Direct derivatives knowledge is helpful, but strong engineering capability is the bigger priority. What you will do • Design and build core platform components including pricing services, APIs, and data pipelines, • Develop scalable ingestion and processing systems for market, macro, and time-series data, • Build internal tooling that improves how analytics and trading signals are developed, tested, and deployed, • Own the full software lifecycle across design, coding, testing, monitoring, and continuous improvement, • Create performant screening and trade discovery tools, • Work closely with traders and quants to turn analytical requirements into production systems, • Improve observability, deployment processes, and developer experience across the platform What you will need • Strong software engineering fundamentals across architecture, design, and quality practices, • 5+ years’ experience in platform engineering, quant development, data engineering, or software engineering within financial services, • Strong Python experience in production environments, • Exposure to C++ or Rust would be beneficial for performance-sensitive components, • Experience building data infrastructure such as APIs, pipelines, and time-series systems, • Good understanding of financial markets, ideally rates or derivatives, • Strong communication skills and ability to work across engineering, research, and trading stakeholders Why consider it • High-impact role working directly on trading-critical systems, • Strong blend of engineering depth and business exposure, • Close collaboration with quants, traders, and portfolio managers, • Opportunity to shape a growing platform in a high-performing fintech environment Contact Ciara Clarke at Harrington Starr with your CV for a confidential discussion.

Core Developer (Python) - Algo Trading Firm - London - Up to £350k+ TC (DOE) One of London's most impressive Algo Trading firms is looking for Engineering Wizards to join their team in London. Having arguably one of the best technology teams in the world, the firm is in a stage of hypergrowth, looking to deliver on its ambitious plans to be a leading liquidity provider in the market. The firm is renowned for its advanced tech and above-market-rate compensation (made ~40 of its staff millionaires in the last 2 years). In the role, you would be focusing on highly scalable distributed systems, working directly with the Lead Core Developer, the CTO and other various internal stakeholders. The system you would be designing and the building will be written on Linux, in Python, but will communicate with the C++ Stack. The focus will be on building a very high-performance system dealing with 100M+ transactions daily. Requirements: • Excellent Python skills with a good understanding of relevant libraries., • Significant system design and architecture knowledge for highly distributed systems., • Ability to design, build and optimise high-performing Python systems from scratch., • Previous experience building/upgrading SQL databases would be highly desirable., • Good knowledge of source versioning systems, • BSc in Computer Science or similar STEM subject. We encourage you to apply even if you think you may not currently fit all these requirements – so long as you have proven academics and are willing to work hard and learn, we want to hear from you. Note: if you haven't received a reply within 3 days, your application was unfortunately not accepted. Core Developer (Python) - Algo Trading Firm - London - Up to £350k+ TC (DOE)

Role: Storage Automation SME Location: Sheffield/Birmingham/London, UK (3 Days Hybrid) Job Type: Contract Inside IR35 Note: No Sponsorship Details: Role Overview The Enterprise Services Storage Platform team is responsible for managing large-scale data storage environments, including file, block, backup, and archive services across multiple regions. The team focuses on engineering and automation across storage platforms, supporting product integration, migrations, and adoption within a DevOps framework. This role involves building, managing, and enhancing enterprise infrastructure services that enable DevOps practices. Key Responsibilities • Certify, test, and develop new features and platforms across SAN infrastructure, including Dell Power Max/Vmax-3/XtremIO, Pure Flash Array, HPE Primera/Alletra, and Cirrus DMS, using Broadcom and Cisco SAN switches/directors and iSCSI connectivity, • Develop automation solutions covering support, installation, provisioning, migration management, and compliance, • Deliver enterprise platform services across UNIX/Linux, Windows, and storage systems for secure data storage and analysis, • Support developer services that enable standardized platform delivery, including virtualisation, ALM, development engineering, and cloud platforms, • Build cloud-based infrastructure platforms and deliver infrastructure and platform capabilities “as-a-Service” in collaboration with business and DevOps teams, • Define and execute strategic direction across enterprise services technology areas, • Manage risk and cost considerations across services, • Ensure service quality targets are consistently achieved, • Engage with business stakeholders to define product roadmaps and align with available capabilities, • Contribute to development activities, including writing code, understanding CI/CD pipelines, building automated test scripts for infrastructure products and upgrades, and developing integration interfaces between systems Required Skills & Experience • Strong expertise in server operating systems: Linux (RHEL), Windows, and VMware, • In-depth knowledge of Dell Power Max/Vmax3/SRDF/XtremIO, Pure Flash Array, HPE Primera, and Cirrus DMS, • Experience with end-to-end server-to-storage mapping, • Proficiency in Python, Ansible, and shell scripting for automation and as-a-service implementations, • Experience in product testing and qualification, • Strong background in server and storage remediation, • Prior experience in storage, scripting, or automation-focused roles, • Solid understanding of cloud and storage infrastructure, • Experience with Infrastructure as Code and orchestration tools such as Puppet, Chef, Ansible Tower, or Jenkins, • Familiarity with CI/CD practices and software engineering approaches, • Experience in storage migrations (both storage- and server-based)

Senior Full Stack Developer - 2 days a week in London - £60-80k I am looking for a Full-Stack Developer to join a fast-growing data and analytics company working at the intersection of data engineering, software development, and AI. This will be to design and build scalable, high-impact digital solutions. This is a hands-on full-stack engineering role with end-to-end ownership across the software development lifecycle. You’ll be responsible for designing, building, and deploying modern web applications, working across both backend and frontend systems. You’ll operate in a small, high-performing team, contributing to architecture decisions, delivery, and continuous improvement of engineering practices. Key Responsibilities • Design and deliver scalable, secure web applications, • Build backend services using Python (e.g. FastAPI, Flask, or Django), • Develop modern frontend applications using React and TypeScript, • Design and maintain RESTful APIs, • 5+ years’ experience as a full-stack developer AI & Modern Development Practices (Required) • Experience using AI coding tools or assistants in day-to-day development, • Understanding of large language model (LLM) fundamentals and limitations Desirable • Exposure to cloud platforms (e.g. AWS, GCP, Azure), • Experience with CI/CD pipelines and infrastructure as code Senior Full Stack Developer - 2 days a week in London - £60-80k

• Job Title: Senior Back End Developer (Python), • Salary Range: £100,000 – £120,000 + Bonus, • Location: London | Hybrid (2–3 days office) This Senior Back End Developer role will shape a brand-new data platform designed to support complex decision-making for major global organisations. This is a greenfield data-driven product and you will be joining at the start of a new engineering team being built. You will have the autonomy to define architecture, tooling, and engineering standards from day one. The Senior Back End Developer (Python / Go) will play a critical role in turning early product ideas into a scalable, production-ready platform, combining start-up agility with the backing of a well-established business. The Senior Back End Developer will… take ownership of backend engineering for a new API-first data intelligence platform. Role Highlights • Design and build scalable backend systems from a true greenfield starting point, • Define architecture, balancing rapid delivery with long-term scalability, • Develop API-first services for data-heavy, enterprise-grade applications, • Embed observability, metrics, and performance tracking from day one, • Collaborate within a small, high-autonomy team shaping a new product You Will Need • Extensive backend development experience within data-driven B2B environments, • Strong programming skills in Python or Go, with API design expertise, • Experience building and scaling cloud-based infrastructure (Docker, Kubernetes, CI/CD), • Proven use of AI-assisted development tools in real-world workflows, • Ability to break down complex problems and deliver iterative solutions Why You’ll Love It • £100,000 – £115,000 base salary plus annual bonus, • True greenfield project with high ownership and influence, • Clear progression as the team and product scale, • Private healthcare, strong pension, and development budget If you’re interested in this exciting Senior Backend Engineering role and have the right experience, please apply ASAP with a copy of your CV.

About Us: We are one of the world’s leading commodities trading houses, leveraging sophisticated technology to trade a broad range of energy, metals, and agricultural commodities globally. Our success is driven by cutting-edge analytics, high-frequency data processing, and a commitment to innovation. We are now looking for a Senior Python Engineer to join our dynamic team in London and drive our next wave of technological advancements. Role Overview: As a Senior Python Engineer, you will be at the heart of our technology platform, building robust systems that enhance our trading strategies, risk management, and data analysis. You will collaborate closely with quants, data scientists, and traders, providing Python-based solutions that directly impact the profitability of the business. This is an exciting opportunity to work in a fast-paced, high-performance environment where you can push the boundaries of technology in financial markets. Key Responsibilities: • Design, develop, and maintain highly efficient Python-based applications for commodities trading, risk management, and real-time data analysis., • Build scalable, high-performance data pipelines to process large datasets from multiple sources, including real-time market data and fundamental data., • Implement robust APIs and microservices to integrate trading systems, analytics platforms, and external data providers., • Optimize performance and scalability of existing systems, ensuring low-latency trade execution and real-time risk monitoring., • Collaborate with quants and traders to prototype and implement algorithms that enhance trading strategies and position management., • Lead code reviews, enforce best practices, and mentor junior developers to foster a culture of excellence., • Work in a collaborative, agile team environment to rapidly develop and iterate on new features and tools. Qualifications: • 5+ years of professional experience in Python development, with a focus on building performant, scalable systems., • Deep understanding of core Python, including its strengths in data manipulation, asynchronous programming, and performance optimization., • Experience with distributed systems, parallel computing, and high-performance processing of large datasets., • Strong experience in data pipelines, working with tools such as Pandas, NumPy, and SQL/NoSQL databases., • Proven experience working in fast-paced environments, ideally within trading, financial services, or high-frequency environments., • Proficiency in developing RESTful APIs, microservices, and working with cloud-based architectures (AWS, GCP, or similar)., • Expertise in testing frameworks, CI/CD, and containerization technologies such as Docker or Kubernetes., • Experience in managing and deploying services in Linux/Unix environments., • Strong analytical and problem-solving skills, with a keen attention to detail and an ability to thrive under pressure., • Fluency in English is required. Preferred Skills: • Experience in commodities markets or broader financial markets., • Knowledge of quantitative modeling, risk management, or algorithmic trading., • Familiarity with big data technologies like Kafka, Hadoop, Spark, or similar. Why Work With Us? • Impactful Work: Directly influence the profitability of the business by building technology that drives trading decisions., • Innovative Culture: Be part of a culture that embraces new ideas, cutting-edge tools, and continuous improvement., • Competitive Compensation: Industry-leading salary, significant performance-based bonuses, and comprehensive benefits package., • Professional Development: Access to world-class learning and development resources, with opportunities for career growth., • Work-Life Balance: Flexible working arrangements, generous holiday allowances, and a strong focus on well-being.

Power the Core of Fintech Innovation: Senior Back-End Developer at Kodelab At Kodelab, we are shaping the future of fintech, blockchain, and AI-powered solutions. Our back-end infrastructure is the backbone of our success, powering everything from secure financial transactions to AI-driven platforms and Web3 integrations. We are looking for a Back-End Developer who can build and maintain scalable, high-performance systems that keep our fintech ecosystem running seamlessly. This role is critical and sensitive to our operations, requiring a developer who is highly available, reliable, and proactive in maintaining system integrity. What You’ll Do • Develop & Maintain Scalable Back-End Systems – Build and optimize microservices and APIs that support high-traffic fintech applications., • Ensure Security & Reliability – Implement secure authentication, encryption, and data integrity measuresfor fintech and blockchain solutions., • Optimize Performance & Scalability – Design database structures and caching mechanisms that ensure low-latency and high availability., • Integrate AI & Blockchain Solutions – Work closely with AI and Web3 teams to power machine learning models, smart contracts, and tokenized assets., • Collaborate with Front-End & DevOps Teams – Ensure seamless API integrations, CI/CD deployments, and overall system reliability., • Maintain High Availability – Proactively monitor and troubleshoot issues, ensuring zero downtime for mission-critical applications., • Contribute to Technical Strategy – Stay ahead of fintech trends and recommend best practices for system architecture and security. What You Bring • 3+ Years of Back-End Development Experience – Strong background in high-availability, performance-driven systems., • Proficiency in Node.js (or Python/Go) – Experience with backend frameworks such as Nest.js, Express.js, or FastAPI., • Database Mastery – Strong SQL (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis) expertise., • API Development & Security – Experience in building RESTful & GraphQL APIs, JWT authentication, OAuth, and cryptographic security., • Scalability & Optimization Skills – Ability to optimize database queries, caching strategies, and event-driven architectures (Kafka, RabbitMQ)., • Cloud & DevOps Experience (Bonus) – Familiarity with AWS, Docker, Kubernetes, and CI/CD pipelines., • Web3 & AI Integration (Bonus) – Understanding of blockchain APIs, smart contract interactions, and AI model deployment., • Problem-Solver & Critical Thinker – Ability to anticipate system challenges and proactively build robust solutions., • Commitment to Availability & Resilience – This role is business-critical, requiring a high level of accountability and responsiveness. Why Kodelab? • Work on high-impact fintech, AI, and blockchain projects with cutting-edge technology., • Be part of a dynamic, fast-moving startup where your contributions directly shape the company’s success., • A collaborative and ambitious team that values technical excellence and innovation., • Flexible work environment with opportunities for growth and leadership. If you’re a highly skilled back-end developer looking for a critical role in a fast-paced fintech environment, apply now and power the future of fintech at Kodelab!

Title: P&L Python developer Location: London, UK Type: Contract These will support core engineering streams, unblock current bandwidth constraints, and ensure continued delivery momentum within a fixed multi-year funding envelope. • 5+ years of strong Python development experience (optional Java) with demonstrable experience of having designed and developed complex server-side components., • Experience working in Financial Services specifically within markets in front office derivatives risk systems or pretrade/origination or post trade management systems., • Computer science or equivalent degree, • Good understanding of Agile and Lean software development practices and associated tools, • Preference for software engineers with strong finance/Risk/P&L domain knowledge, rather than heavy “pure quants”., • Ability to work in a fast paced environment liaising with demanding stakeholders to understand complex requirements, and be able to prioritize and work on issues on own., • Strong communication and presentation skills. Clear, Concise Communication skills, ability to articulate Problem/Solution., • Knowledge of Quartz technology stack, • Pricing and Risk knowledge - structure and pricing of derivative products, • Derivatives Risk domain knowledge (Greeks and Scenarios), • Equity Derivatives product knowledge (Futures, Options, Convertibles)

Salary: £70,000 – £100,000 + equity Location: Hybrid, London — 2 days per week in the office Build the platform behind nature intelligence. The world is facing a nature crisis. We have lost 85% of the world’s wetlands, 35% of its forests and 65% of its living creatures. To build a nature-positive future, companies need better ways to understand their impacts, dependencies, risks and opportunities — and turn that insight into action. Natcap is building the nature intelligence platform to make that possible. We help leading companies prioritise, measure and act on nature-related risks and opportunities. Our mission is to accelerate the nature-positive transition by embedding nature intelligence into business decision-making. We’re now looking for a Staff Platform Engineer to help us build the infrastructure, tooling and developer foundations that will support Natcap as we scale. This is a senior, hands-on engineering role with broad technical influence. You’ll work across cloud infrastructure, developer experience, delivery systems, data workloads and internal tooling. You’ll help us make pragmatic technical decisions, improve how we build and ship software, and strengthen the foundations of a product being used to tackle one of the world’s most urgent sustainability challenges. Why this role matters: This is not a platform role where you’ll be far removed from the product. You’ll be close to the work that matters: partnering with Engineering, Product, Design, Science and Delivery to make our platform easier to build on, safer to operate and better prepared for scale. You’ll join a small, experienced and collaborative engineering team where people are trusted to own outcomes, make decisions and improve the way we work. Everyone builds, ships and contributes to technical direction. The role is particularly well suited to someone who enjoys: • Staying hands-on while influencing engineering direction., • Building platform foundations that help other engineers move faster., • Making sensible trade-offs across security, reliability, cost and developer experience., • Working in a small, high-trust team where good ideas can become real improvements quickly., • Exploring how AI-enabled tooling can improve engineering speed, quality and leverage. What you’ll work on: You’ll work across infrastructure, developer experience and delivery systems, helping us build strong foundations for both our software and data platforms. Your work is likely to include: • Designing, building and improving our cloud infrastructure on AWS., • Owning and evolving our Infrastructure as Code approach, primarily using Terraform., • Improving CI/CD pipelines and deployment workflows, including GitHub Actions-based automation., • Supporting application and data workloads across services such as Kubernetes, EKS, ECS and Lambda., • Helping product and data teams make practical infrastructure decisions across cost, performance, security and developer experience., • Introducing and improving security, quality and reliability controls across the engineering lifecycle., • Using AWS services such as CloudWatch, CloudTrail, GuardDuty, Config and Athena to monitor, secure and improve our infrastructure., • Improving our internal developer experience through better tooling, automation and documentation., • Contributing to the development of AI-enabled engineering workflows, including multi-step pipelines, agentic automation and model-provider integrations., • Helping define what great platform engineering looks like at Natcap as we grow. Our current stack: You do not need to have worked with every part of our stack, but you should be comfortable operating in a modern cloud-native engineering environment. Our current stack includes: • AWS as our primary cloud platform., • Python and JavaScript applications., • GraphQL APIs., • PostgreSQL on RDS., • CI/CD with GitHub Actions., • Data processing pipelines using Argo Workflows and Metaflow., • Event-driven patterns using SQS., • Infrastructure as Code managed through Terraform, including EKS, ECS, RDS, Karpenter, SSO integration, IRSA, Lambdas, CloudWatch, CloudTrail, GuardDuty and Landing Zone. What we’re looking for: We’re looking for someone with strong platform depth, good engineering judgement and a pragmatic startup mindset. You’ll likely be a strong fit if you: • Have deep experience in Platform Engineering, DevOps or Infrastructure Engineering., • Have operated at a level equivalent to Lead in a startup, or Senior/Staff level in a larger organisation., • Have strong AWS expertise., • Are confident building and managing infrastructure with Terraform., • Have improved tooling, controls or processes across the engineering lifecycle., • Understand how to build secure, scalable infrastructure without over-engineering., • Can make thoughtful trade-offs across budget, reliability, security and developer experience., • Are comfortable working close to product, software and data teams., • Communicate clearly with both technical and non-technical colleagues., • Enjoy hands-on engineering in a fast-moving environment with ambiguity and changing priorities., • Are interested in using AI tools to improve engineering workflows, delivery speed and quality., • Are happy working from our London office two days per week. Bonus points: It would be helpful, but not essential, if you also have: • Experience with Google Cloud., • Strong Kubernetes or EKS experience., • Familiarity with Argo Workflows, Metaflow and event-driven architectures., • Experience supporting both product and data platforms in the same environment., • Experience building or improving AI-enabled software delivery pipelines. What you’ll get: • A high-impact technical role in a mission-driven company., • The opportunity to help build a platform tackling one of the world’s most urgent sustainability challenges., • Competitive salary and equity., • Enhanced parental, carers, compassionate and emergency leave., • Regular offsites to reflect, plan and spend time together as a team., • A £500 learning and development budget., • Wellness and lifestyle benefits., • The chance to grow quickly, personally and professionally., • A supportive engineering culture that values ownership, experimentation and continuous learning. Find out more at ___

Osmosis is an asset management business in what we would argue is the most exciting area of the market - sustainable investing. Our mission is to provide investors with investment solutions that target better risk-adjusted returns while mitigating the environmental impact of their portfolios. Our growth is a testament to the team we have built and the results we have delivered. About Osmosis Osmosis launched in 2009 and is majority owned by management and employees. The company is headquartered in London with a presence in the US and a growing presence in Australia. Osmosis a market leading sustainable asset manager is rebuilding the investment stack from the ground up. As we scale into a next-generation environmental asset manager, we are designing a proprietary data and AI platform that transforms how sustainability data is captured, validated, and used in real investment decisions. We are at an inflection point. The firm is evolving from a traditional asset manager into a technology-enabled investment platform. The systems we build now will define how we scale, differentiate the firm and further develop and protect our IP advantage. Job Overview: We're looking for a software developer to join the team that builds and operates our environmental, fundamental and market data platform — from ingestion and extraction through to the tools our analysts and clients use every day. Someone who understands the needs of the business/teams and transforms them into solutions is a key attribute. You will help architect and build the core system that sits between global capital and real-world environmental outcomes, combining financial data, unstructured disclosures, and AI-driven insight into a single operating platform. You won't be pigeonholed into "backend" or "frontend" but will work across the stack, including: • building pipelines between financial data vendors (eg Bloomberg, Factset) and our data platforms, • building processing pipelines that extract structured data from messy real-world documents, • evolving the web application our research team relies on, and improving the infrastructure that ties it all together., • building apps that connect to quantitative research tools, • building tools and analytics within (often powered by data hosted on Snowflake), • developing multi-agentic frameworks Core responsibilities will include: • Web application — Building and extending our internal platform used daily by research analysts to manage companies, fields, and extracted data, • Cloud infrastructure — Deploying and managing Azure resources using Infrastructure as Code, keeping environments reproducible and costs under control, • Integration & orchestration — Designing queue-based microservices that coordinate work across the platform reliably and at scale, • Data quality — Building validation, confidence scoring, and tooling that helps the team trust the data we produce, • Structured data pipelines – ETL on structured financial data and building downstream data models on common platforms such as Snowflake, • Data extraction pipelines — Processing sustainability reports and financial disclosures using Azure AI services (Document Intelligence, OpenAI) to turn unstructured PDFs into structured, validated data, • Maintenance – management and maintenance of the tech stack and applications., • AI integration – experience in working with AI tools and the associated security and risk elements, • Managing outsourced IT function – knowledge IT security Our Tech Stack: • Languages: C# (.NET), Python, • Frontend: Blazor (server-side), Radzen components, Javascript, • Backend: Azure Functions (C# and Python), queue-driven microservices, • AI/ML: Azure OpenAI, Azure Document Intelligence, embedding-based search, Langraph, Hugging Face, experience interacting with LLMs, • Data: Azure SQL, Entity Framework Core, Azure Blob Storage, Snowflake, dbt, • Infrastructure: Bicep (IaC), Azure DevOps pipelines, Docker, Application Insights, • Practices: Trunk-based development, CI/CD, infrastructure as code, automated testing Skills: • Solid experience building and shipping software professionally, • Comfortable working across the full stack — you don't need to be an expert in everything, but you're not afraid to jump into unfamiliar territory, • Experience with cloud platforms, ideally Azure (Functions, Storage, SQL, identity), • Highly proficient in Python, • Familiarity with Django, • Preferably API dev experience (eg FastAPI), • Familiarity with C# (ideally both, but strong in one with willingness to learn the other works), • Snowflake experience, • Experience with AI/ML services, LLM integration, or document processing, • Ideally some data modelling experience, eg dbt, • A DevOps mindset — you care about how your code gets built, tested, deployed, and monitored, not just how it runs on your machine, • Good knowledge around data modelling, API design, and system boundaries, • Strong knowledge of financial data, • Familiarity with ESG, or sustainability reporting frameworks, • Clear communication — we're a small team where everyone talks to everyone, • Experience working in small, fast-moving teams where you wear multiple hats, • Knowledge of Langgraph is desirable, • Infrastructure as Code (Bicep, Terraform, or similar), is desirable, • Proactive., • Excellent attention to detail., • Good communication skills Osmosis recognises the positive value of diversity and aims to promote equality and challenge unfair discrimination. As a champion of equal opportunity employment, we welcome applications from all suitably qualified persons – people of all ages, sexual orientations, backgrounds, religions, and beliefs. We particularly encourage applications from women, disabled, and Black, Asian and minority ethnic candidates as these groups are underrepresented throughout the financial services industry.

About Safiyaa: Safiyaa is a high-end women’s fashion brand renowned for luxury design, craftsmanship, and a modern direct-to-consumer model. As the business grows, we are investing in our technology stack to support real-time decision making, operational efficiency, and a world-class digital experience. The Opportunity: We are looking for a Full Stack Engineer to join our small but ambitious team. You will play a key role in designing and building the next generation of Safiyaa’s internal systems – building upon our custom CRM and production process tooling. This is a unique opportunity to join a growing brand and build software from the ground up. You’ll be hands-on with architecture decisions, database designs, and api implementation, working closely with leadership and operations to deliver solutions that scale with the business. What You’ll Do: • Design and build custom applications that integrate with Microsoft Business Central, Shopify, and other business tools., • Develop both front-end and back-end solutions (React/Next.js and Node.js)., • Build and maintain APIs and services for internal use., • Work with cloud infrastructure (AWS, Vercel) to ensure scalability, performance, and security., • Help migrate from low-code solutions to a fully owned, flexible tech stack., • Collaborate with the CEO, Tech Lead and Product Managers to translate business requirements into technical solutions., • Document and implement best practices for ongoing development and maintenance. What We’re Looking For: • 4+ years proven experience as a Full Stack Developer/Engineer., • Experience with:, • Front-end: React, Next.js (App router) or similar., • Back-end: Node.js, Python or similar. Experience with server actions., • Cloud infrastructure: AWS, Azure or similar., • Familiarity with Shopify API/Webhooks, or related payment integration APIs., • Experience with Postgres, database infrastructure, and ORMs (Prisma, etc), • Enthusiasm for building scalable systems in a fast-moving environment. Why Join Us? • Shape the future of technology within a growing luxury brand., • Work in a creative and collaborative environment with direct access to leadership., • Freedom to design and influence architecture and processes., • Competitive salary and career growth opportunities. Interview Process: • Introductory Call (30 mins), • Short take home technical test (approx. 1h), • Technical call, regarding the test and some additional questions (approx 1h30), • If we are happy, a final call regarding an offer! Salary: 65k-70k/yr

Job Title: Senior DevSecOps Engineer Location: London Contract Length: 12 months Working Pattern: Hybrid, Via Umbrella Company Join Our Team! Are you ready to take your career to the next level in a dynamic, fast-paced environment? Our client, a leading financial institution, is seeking a passionate and experienced Senior DevSecOps Engineer to lead the charge in defining and implementing cutting-edge CI/CD and DevSecOps strategies! What You’ll Do: As a key player in our client’s engineering team, you will: • Define & Own: Craft and manage the enterprise CI/CD and DevSecOps strategy to align with security, risk, and governance standards., • Architect Solutions: Develop CI/CD approaches that cater to multiple teams and technologies while ensuring quality, security, and scalability., • Enhance Cloud Applications: Provide your expertise in building cloud and cloud-ready applications, and support containerized workloads using Docker and Kubernetes., • Integrate Security & Compliance: Embed security controls directly into CI/CD pipelines, ensuring solutions meet all governance and regulatory requirements., • Engage Stakeholders: Build strong partnerships with functional teams and translate complex technical concepts into clear recommendations for various audiences., • Drive Continuous Improvement: Champion a strong engineering mindset and relentlessly seek new tools and approaches to enhance developer experience and release cadence. What We’re Looking For: To thrive in this role, you should possess: • Core Technical Experience: Extensive experience in designing enterprise-scale CI/CD solutions, with a focus on GitLab. Hands-on experience in supporting build pipelines for Java, C#, JavaScript, and Python is essential., • Cloud & Containerization Expertise: Proven ability to deliver containerized and cloud-ready applications, with experience in integrating CI/CD pipelines with cloud services., • Financial Services Acumen: Familiarity with highly regulated environments, especially in the financial sector, and a strong understanding of risk management and governance frameworks., • Leadership Skills: You should operate effectively as a senior individual contributor, demonstrating sound judgment, professionalism, and integrity while influencing outcomes without direct authority., • Communication Skills: Exceptional clarity and precision in communication, particularly regarding risk-aware recommendations. What Success Looks Like: • Secure, scalable, and trusted CI/CD platforms across the organization., • Efficient and compliant delivery of containerized and cloud-ready applications., • Seamless integration of security and governance into delivery processes., • Empowered development teams capable of navigating control frameworks effectively. Why Join Us? This is your opportunity to be at the forefront of innovation in the financial services industry! You’ll work in a collaborative environment where your expertise is valued, and your contributions will make a real impact. Ready to Make a Difference? If you’re driven by a passion for engineering excellence and are ready to take on new challenges, we’d love to hear from you! Apply now and join our client’s mission to innovate and lead in the financial sector. Your next big opportunity awaits! We use generative AI tools to support our candidate screening process. This helps us ensure a fair, consistent, and efficient experience for all applicants. Rest assured, all final decisions are made by our hiring team, and your application will be reviewed with care and attention. Adecco is a disability-confident employer. It is important to us that we run an inclusive and accessible recruitment process to support candidates of all backgrounds and all abilities to apply. Adecco is committed to building a supportive environment for you to explore the next steps in your career. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.

Full Stack Python Developer London / Hybrid | Permanent A global financial markets business is hiring a Full Stack Python Developer to join a high-impact enterprise engineering team working on one of its most strategic platform initiatives. This role sits within a central technology function responsible for building shared capabilities used across multiple trading and business areas. You’ll be helping shape the next generation of internal platforms, developer tooling, APIs, data services and AI-enabled products that support growth across the wider organisation. This is an excellent opportunity for an engineer who enjoys solving complex technical problems, working across teams and building scalable systems in a fast-moving environment. The Opportunity You’ll join a modern engineering team focused on creating reusable enterprise technology that reduces duplication, accelerates delivery and improves standards across the business. The platform under development is central to the company’s long-term technology strategy and will power a wide range of future digital services. You’ll work across backend engineering, cloud infrastructure, integrations and internal tooling, while also contributing to emerging AI initiatives and developer productivity capabilities. What You’ll Be Doing • Design, build and maintain production-grade Python services and APIs, • Develop shared platform capabilities including APIs, connectivity layers and real-time services, • Build internal tools and development environments for engineering teams, • Contribute to AI-driven tooling and automation across the engineering estate, • Work closely with product owners, architects and engineers to deliver robust solutions, • Help define architecture standards, best practice and reusable patterns, • Build secure, scalable and resilient systems used across multiple business units, • Improve CI/CD pipelines, testing frameworks and DevOps processes, • Support production systems and troubleshoot issues where required, • Produce clear technical documentation and maintain long-term platform quality, • Contribute to a collaborative, high-performing engineering culture What They’re Looking For • Strong Python backend development experience in production environments (at least2 years), • Experience building APIs using frameworks such as FastAPI, Flask or Django, • Good knowledge of at least one Python-compatible frontend framework, • Strong experience with AWS services and cloud-native development, • Understanding of event-driven systems (Kafka highly desirable), • Strong grasp of software engineering principles and clean architecture, • Experience with CI/CD, automated testing and DevOps practices, • Comfortable working across teams to solve business problems with technology, • Experience in Agile delivery environments Desirable Experience • Node.js or C# exposure, • Terraform / Infrastructure as Code, • Distributed systems or API gateway experience, • Monitoring / observability tooling, • Enterprise platform or shared services experience, • Financial markets / capital markets background, • Experience with front-office tooling or trading environments Package • Competitive base salary, • Bonus potential, • Hybrid working model, • Strong benefits package, • High visibility strategic platform work, • Long-term progression opportunities within a global business Find Out More For a confidential discussion and full details on the team, roadmap and package, get in touch with Ciara Clarke at Harrington Starr

Python Developer | Energy Trading House - Greenfield Python Front Office | £65,000 + Bonus + Benefits | London Hybrid Python Developer is required by a leading Energy Trader to support the front office of their hedge fund division. This is a quite unique opportunity because it is one where you will be working with all trading desks in a small development team with full exposure to all technology decisions. It also does not require previous Financial Services background but an interest in it would definitely be advantageous. As a Python engineer you’ll be working in a fast-paced environment helping Quants and Technology teams to deliver scalable trading services. This role offers the chance to influence architectural decisions and contribute to modernising core platforms used across trading. Join a fast-paced front office team where your code directly impacts trading decisions and real-time risk. You’ll build high-performance Python tools and systems used daily by traders, working at the intersection of technology and markets. This is a hands-on Python Engineering role with real ownership—designing analytics, improving execution workflows, and delivering robust solutions under real market pressure. Key Responsibilities of the Python Engineer: • Engineering high-quality backend services using core Python, developing software from scratch rather than simple scripting (experience with OOP is important), • Working closely with cross-functional teams to gather requirements and deliver robust, well-architected solutions, • Supporting the evolution of system architecture and best practices, • Helping the frontend team when needed Offer for the Python Engineer : 💰 Up to £65,000 base salary + bonus (20%+) 🏢Hybrid working: 3 days in office in London, 🚂St Paul's 💻Strong Python, abilite to quickly understand requirements, design solutions, and deploy applications dedicated to specific tasks is a must. Tech Stack & Experience Required: • Strong core Python engineering experience (3+ years), • Exposure to OOP is hugely beneficial, • Knowledge of trading environments is a bonus but financial services exposure suffices, • Creating production level code is essential, • Solid communication skills - able to work closely with technical and non technical stakeholders If you’re interested in this Python Engineering role, please apply or send your latest CV to Python Developer | Energy Trading House - Greenfield Python Front Office | £65,000 + Bonus + Benefits | London Hybrid

Software Engineer - London £80k base + meaningful EMI equity About Revax Revax is building a new class of AI-native software for tax advisory teams. Today, advisers lose entire days to researching and drafting advice - fragmented knowledge, manual workflows, and brittle tooling. We turn a firm's own expertise into structured, transparent AI systems that draft, analyse, and explain deliverables with full traceability. We're a seed-stage startup backed by leading institutions and angels, already working with major firms. The team is small, technical, and shipping fast. The role We're hiring a Software Engineer to help scale Revax. You will work directly with the founders, owning features end-to-end across the stack, and helping to define how AI systems are built responsibly in regulated domains. Customer calls, prototyping, production hardening, and the work that lets us sell into leading firms - all of it is in scope. If you enjoy designing clean APIs, scaling services, and shipping products to paying enterprise customers, this role is for you. What you'll do • Model and optimise PostgreSQL / Supabase & graph db / Neo4j schemas for complex data, • Design and implement APIs in FastAPI for AI workflows and product features, • Build and scale LangGraph-based multi-agent systems with checkpointing, retries, and observability, • Integrate vector search, knowledge graphs, and retrieval pipelines into production services, • Deploy services on GCP (Cloud Run / GKE) and improve performance, reliability, and cost, • Implement the auth, IAM, audit, and access-control patterns enterprise customers expect, • Help deploy SSO, tenant isolation, auditability, and the security reviews that come with selling to major firms, • Work with customers, other engineers, and the founders to create best in class software Who we're looking for Essential • 2–3 years building production software used by real users, • Experience working in startups (1 year + of total experience), • Experience with LangGraph, RAG pipelines, vector databases, or knowledge graphs, • Production experience with FastAPI or a similar modern Python framework, • Experience scaling and operating services on GCP, AWS, or Azure, • A high-ownership mindset - you care about reliability, correctness, and outcomes, not lines of code, • Heavy use of modern AI coding tools (Cursor, Claude Code, Codex) Strong plus • Experience with any of; multi-tenant deployments for enterprise customers, VPC networking, Kubernetes, or shipping into procurement-heavy regulated buyers., • Exposure to Neo4j or graph-based data modelling, • Time spent on AI-native or agentic systems in production Nice to have • Exposure to professional services, finance, tax, or other regulated domains, • Strong instincts for developer experience and internal tooling The package • £80k base + meaningful EMI equity, • London-based, with a strong preference for in-office, • Visa sponsorship available, • Modern stack, and driven team that you can get have an impact in from day 1. If this sounds like you, please apply.

ABOUT THE COMPANY Onmo believes that everyone has the right to access, understand and manage their money with confidence. Our ambition is to improve lives by providing better clarity, intelligence and technology to empower every individual in making the smartest financial decisions. We may be young but we have an incredible team in place and big ambitions for the years ahead. We design our products to help demystify money matters wherever possible, providing customers with more financial control and flexibility in their lives. This helps them get more from what they have, or with smart decisions, make more of the same. It also means people spend less time with the negative aspects of money and more on the positive - enjoying what the world has to offer. ABOUT THE ROLE Tech Stack • Backend : AWS Serverless Service, including Lambda, API Gateway, DynamoDB, S3, SNS, SQS, EventBridge, Kinesis, Node.js, YAML, • Frontend : React / Next.js, React Native, • Programming Languages : TypeScript; JavaScript, Python, • Infrastructure : Terraform, GitHub CI/CD pipelines Responsibilities • Provide technical leadership and mentorship to your team. As a Senior Full-stack Software Engineer, you will be responsible for guiding and developing the skills of junior engineers., • Lead technical decisions and design for your team. You will be expected to provide technical guidance and direction to your team members., • Collaborate with Product Owners to ensure that the technical roadmap aligns with the product vision. Actively participate in product planning meetings and provide technical input to guide the team's priorities., • Design, develop, and maintain full-stack applications using Node.js, AWS Lambda, React with Next.js, TypeScript, and Terraform., • Write clean, efficient, and well-tested code that adheres to best practices and coding standards., • Ensure code quality, organisation, and automatisation., • Optimise applications for maximum speed and scalability., • Deploy applications using CI/CD pipelines and manage infrastructure as code with Terraform., • Provide technical guidance and mentorship to junior developers., • Stay up-to-date with new technology trends, applications, and protocols., • Contribute to the development of technical documentation and standards. ABOUT YOU Qualifications • Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field, or equivalent experience., • Proven experience as a Senior Full Stack Developer or similar role with a strong portfolio of projects., • Expertise in Node.js and AWS Lambda for serverless backend services., • Proficiency in React with Next.js for frontend development., • Proficiency in TypeScript and experience with infrastructure as code using Terraform., • Understanding of RESTful APIs and web application architecture., • Ability to write clean, readable, and maintainable code., • Excellent problem-solving skills and attention to detail., • Knowledge of Agile methodologies and experience working in Agile development environments. Required Skills • Embrace change and be open-minded to different approaches. Adapt to new technologies, processes, and ways of working., • Demonstrate critical thinking and effective decision-making skills. Take ownership and accountability for your work, and be proactive in delivering high-quality results., • Lead change effectively. Identify opportunities for improvement, communicate the vision for change, and empower your team to implement necessary., • Excellent communication skills, with the ability to explain and present detailed concepts or requirements clearly, tactfully and concisely to what may not always be a technically experienced audience – in person and in writing., • Self-motivated, can be relied upon to follow up questions and outstanding actions, and to drive projects to completion according to requirements and schedules., • You can see opportunities to explore new approaches and are not scared by the unpaved road ahead. Onmo is a start-up environment, and we need help to create the culture, processes and standards which drive our future behaviour., • Eye for detail is important, especially considering we are dealing in the world of money – the most critical aspect of people’s lives., • Relevant industry experience., • Willingness and desire to learn. Bonus Skills • Knowledge of additional programming languages and frameworks., • Experience with cloud architecture beyond AWS, such as Azure or Google Cloud Platform., • Understanding of continuous integration and continuous deployment (CI/CD) practices., • Start-up experience.

Python Developer | Python & FastAPI | Founding Engineer in AI Venture Studio Building Creator-Led Products Salary: 90k + Generous Equity Location: On-Site, London The Role You’ll join an early-stage AI venture studio as a Founding Engineer, working directly with the CTO inside a small, elite team building and launching creator-led B2C software businesses. This is a backend-leaning (~80% backend) role where you’ll own core systems end-to-end, from shaping APIs and data models through to shipping, monitoring, and iterating in rapid cycles. You’ll have real autonomy, meaningful responsibility, and a direct line between what you build and real users from day one. Why Join You’ll be joining a team of 5 reinventing how software companies are created. Instead of spending years searching for distribution, they partner with large creators (often 1M+ followers) as co-founders, building bespoke apps for highly engaged audiences. Every product launches with built-in demand, real users, and immediate feedback. Under the hood, everything is powered by an internal AI-first “factory”: reusable components, agent-based workflows, and a growing knowledge graph that learns from every product shipped. The goal is simple: launch ventures dramatically faster and cheaper than traditional startups, without sacrificing quality. You’ll get an intensity of ownership, shipping reps, and product exposure that would normally take years to accumulate elsewhere. This is a role for engineers who want to build, ship, and learn at full speed and who care deeply about turning ideas into real products people actually use. What They’re Looking For You will have mid-to-senior backend engineering experience in production environments, and bring a high-agency mindset to your work, naturally taking responsibility, making decisions, and acting like a founder rather than waiting for direction. Clear communication skills are a must, as well as an ability to operate in ambiguity. Non-Negotiables • Python, • FastAPI – or adjacent Python frameworks, • API design and backend architecture fundamentals, • PostgreSQL and/or MongoDB experience, • Strong React or React Native experience, • AWS serverless infrastructure and Docker experience for bespoke services Nice to Haves • B2C mobile app experience, • Node.js development alongside Python, • Vector databases such as Chroma and embedding pipelines, • LangChain, CrewAI, or similar orchestration frameworks, • Practical security and data-privacy awareness, • Experience using Linear or similar planning tools, • Experience with Gemini and/or NanoBanana Pro or any other image modelling AI systems, • Experience with AI-assisted development using tools like Claude Code Previous startup experience is ideal. Employee Benefits • Base salary of £90,000, with a guaranteed increase post-fundraise, • 25 days holiday + 1 day off on your birthday, • £500 annual budget for learning, events, and upskilling, • Access to best-in-class AI development tools, • On-site role in London (flexibility for the right person) Python Developer| Python & FastAPI |Founding Engineer in AI Venture Studio Building Creator-Led Products

numi have once again partnered with a leading player in alternative asset management is reshaping the treasury function. With cutting-edge technology and a seasoned team of industry experts, this company aims to reduce financing costs and optimize return metrics. Who We're Seeking: • We're on the lookout for a seasoned Associate to Mid-level Software Engineer with hands-on Python experience., • Familiarity with AWS Serverless and related technologies would be advantageous., • Strengths in Pandas, Polars, Pytest, Postgres, and CI/CD is essential., • If you're interested in Agile methodologies, and have a curiosity about DDD and Event-Driven architectures, you'd fit right in. What You'll Do: • Spearhead core capabilities for Client Onboarding Value Stream., • Bring to life our loosely-coupled event-based architectural vision., • Elevate user experiences and process-based outcomes., • Mentor junior team members and contribute to collective growth. Process: • Zoom call with the technical lead (60 mins): Discuss your career journey and skills., • Face-to-face session with the team (90 mins): Collaborate on an exercise, showcasing your skills and working style., • Zoom calls with the executive team (30 mins each): Explore industry insights and the company's role. Interviews are kicking off & we are shortlisting candidates for this position, if this sounds like something that would suit your experience. Apply now!

Python Developer | Greenfield Energy Trading | EU Gas & Power | London Hybrid | 6 Months Rolling | £750/Day Inside IR35 A Python Developer with strong core engineering skills is required by a leading Trading House institution to support the front office teams in the business. This is a quite unique opportunity because it is one where you will be working front office on requirements provided by the business and help to build them out for their front office desks. You’ll be working in a fast-paced environment helping Quants and Technology teams to deliver scalable trading services. This role offers the chance to influence architectural decisions and contribute to modernising core platforms used across trading. Key Responsibilities: • Engineering high-quality backend services using core Python, developing software from scratch rather than simple scripting (experience with OOP is important), • Working closely with cross-functional teams to gather requirements and deliver robust, well-architected solutions, • Supporting the evolution of system architecture and best practices Tech Stack & Experience Required: • Strong core Python engineering experience (3+ years), • Exposure to OOP is hugely beneficial, • Knowledge of trading environments is important, • Azure knowledge is a big plus, • Solid communication skills - able to work closely with technical and non technical stakeholders Offer: • £750/Day Inside IR35, • 6 Months Rolling, • Hybrid working: 3/4 days in the office, 1/2 days remote If you’re interested in this Python role, please apply or send your latest CV to Python Developer | Greenfield Energy Trading | EU Gas & Power | London Hybrid | £750/Day Inside IR35

The pitch. It’s a serious engineering role with a great team – and meaningful responsibility. This is not a narrow “ticket-closing” developer job. You won’t be handed tightly scoped Jira tasks inside a heavily layered team structure. You won’t be maintaining a disposable MVP. And you won’t be managing people. Instead, you’ll be working on the core platform that underpins Outsmart’s crowdsourcing operations – a mature, revenue-generating system that has evolved over years and continues to scale. If you enjoy owning real systems, thinking architecturally, improving legacy code thoughtfully rather than rewriting it, and being trusted to deliver without heavy supervision, this role will feel unusually well-matched. The role As Senior Fullstack Software Engineer, you will help design, build and maintain the production systems that power Outsmart’s platform. You’ll work closely with our CTO, operating as a high-agency individual contributor with genuine ownership across backend systems, infrastructure and platform evolution. This is a role for someone who wants to: • Work on real, live systems with meaningful operational responsibility, • Make architectural decisions, not just implement them, • Improve and extend an existing platform with care and judgement, • Help shape the engineering foundations for the next stage of company growth You will be trusted to take product and operational requirements and translate them into robust, production-ready solutions. What you’ll be doing • Designing and maintaining backend services primarily in Python, • Developing and evolving well-structured RESTful APIs, • Designing and improving data models across relational (e.g. PostgreSQL) and NoSQL databases, • Working across the stack where needed, including JavaScript, modern HTML/CSS, and utility frameworks such as Tailwind, • Contributing to cloud-based infrastructure (e.g. Google Cloud), deployment pipelines and DevOps practices, • Debugging live production issues with a calm, root-cause mindset, • Incrementally improving system architecture using sound design principles (including modular design, DDD-style thinking, and pragmatic architectural patterns), • Reviewing code, raising standards constructively, and contributing to a disciplined engineering culture, • Leveraging modern tooling (including AI-assisted development) to improve quality and velocity This is not greenfield experimentation. It is thoughtful, high-quality engineering on systems that matter. The environment We are a small, intellectually serious company. That has advantages and responsibilities. You will: • Speak directly with senior decision-makers when needed, • Operate without perfect documentation, • Balance speed with long-term maintainability This role suits someone comfortable with autonomy, accountability and cross-functional collaboration. Who this role is for This role is designed for someone who is: • 8–15 years into their engineering career, • Has worked in a small company (c. 5–30 people) or similarly lean environment without heavy process, • Experienced in inheriting and improving mature systems, • Comfortable reading and navigating complex legacy code, • Strong in systems thinking (trade-offs, scalability, cost implications), • Backend-heavy, with strong Python expertise, • Operationally mature – you’ve supported production systems, not just built features You are likely: • Calm under pressure, • Direct but not ego-driven, • Curious and thoughtful rather than dogmatic, • Comfortable challenging ideas constructively If you primarily identify as a manager, a greenfield-only builder, or someone who prefers heavy structure and layered sign-off, this role is unlikely to be a good fit. Practicalities Schedule: Monday to Friday Weekends: No Location: UK-based Working style: Hybrid (remote and London office) Why Outsmart Insight? Outsmart Insight operates at the intersection of technology, intelligence and large-scale coordination. Our internal platform powers a global network and supports complex, high-trust client engagements. We are deliberately serious about quality, reliability and long-term thinking. As we grow, we are investing in strengthening our engineering foundations – building systems that are robust, scalable and thoughtfully designed. If you want to work somewhere where your engineering judgement genuinely matters, this is that opportunity. Our values • Smart minds, working together, • Quality delivered every time, • Strong client relationships built on trust, • Hard work, rewarded, • A happy, healthy team Apply Send a short cover letter and a two-page CV to , outlining why this role, and this type of engineering work, appeals to you. Please note: only applications sent directly to this email address will be considered.

Engineering Manager Climate Tech Non-Profit £90,000 to £112,000 The Role Hands-on leadership role managing 20 engineers across multiple teams who are building a no-code energy systems modelling platform, transitioning to a PaaS model for external users. You'll own architecture standards, drive delivery, and evolve cloud infrastructure, working closely with Product and the CTO. Responsibilities • Lead the team: 1:1s, career growth, performance, hiring, • Own backend architecture and design standards (DDD, clean APIs, open standards), • Drive end-to-end delivery with a bias to shipping value incrementally, • Evolve cloud infrastructure for scalability, reliability, and cost-efficiency, • Shape how the team uses AI tooling to raise, not lower, the bar What You Bring • 8+ years of software engineering experience; deep expertise in backend and distributed systems, • Proven engineering leadership: hiring, coaching, 1:1s, and team delivery, • Strong software design fundamentals: DDD, modularity, clean APIs, versioning, • PostgreSQL, ORMs, migrations, and performance optimisation, • Experience building developer platforms, multi-tenant systems, or public APIs, • Python (FastAPI/Flask), Docker, GitHub Actions, Cloud Run, CI/CD, containers, • Clear communicator across engineers, product managers, and senior stakeholders

Senior Software Engineer Are you a developer who loves building products, not just features? Do you thrive at the intersection of robust backend logic, intuitive frontend interfaces, and conversational AI? Are you excited to join a fast-growing, seed-funded startup transforming construction procurement? If you want to own a product from the database to the UI, we’d love to hear from you. About Us At Prolo, we’re reinventing procurement for the construction industry using AI. Our platform helps customers source materials effortlessly across WhatsApp, email, and phone—saving time and money with zero setup. We’re a small, ambitious team of 10 that moves fast, trusts each other, and enjoys building genuinely impactful technology. Your Role As a Senior Software Engineer you won’t just be ticket-crunching. You will own the end-to-end experience of our platform. You’ll be responsible for architecting scalable backend services that power our AI engine while ensuring the frontend experience is world-class. You’ll: • Build & Own: Lead the development of new features across the entire stack (Node/Python, React, and Postgres)., • AI Integration: Design and build the interfaces and APIs that allow our users to interact seamlessly with LLMs and conversational agents., • Product Thinking: Work directly with the founders to define the roadmap and turn customer insights into production-ready features., • Workflow Optimization: Support our AI-led procurement engine with high-quality data integration and scalable workflows., • User Experience: Ensure our chat and workflow interfaces are intuitive, fast, and reliable for real-world users in the field., • Scale: Help shape our engineering culture and technical architecture from the ground up as we grow. What We’re Looking For • The Full Stack: Strong experience with modern frontend frameworks (React) and backend environments (Node.js, Python, or similar)., • Startup DNA: You are comfortable in a fast-moving, seed-stage environment where you often have to figure things out from scratch., • Product Mindset: You care about why we are building something, not just how. You are user-focused and commercially aware., • AI Curiosity: Deep interest in LLMs and conversational products; experience with AI APIs is a significant plus., • Ownership: You take pride in shipping high-quality, tested code and seeing it deliver value to customers. What’s in It for You? • Equity: Become a true stakeholder in Prolo’s success., • Impact: Real ownership over a core product that construction firms rely on daily., • Tech: Work on cutting-edge conversational AI technology., • Location: Join us in our Marylebone office with a flexible hybrid rhythm., • Culture: A high-trust environment that values pace, transparency, and impact. Apply today and help us build the future of construction at Prolo. Prolo Ltd is committed to creating an inclusive and diverse workplace. We welcome applicants from all backgrounds No Agencies!

KLH Sustainability is looking for Maternity Cover (with potential to extend into a permanent position) as a Sustainability Analyst to join our London-based team! What KLH offer • A fixed-term contract of 12 months starting 1st June 2026 with the potential to extend into a full-time position, subject to performance and business need., • A collaborative work environment in a small and supportive team formed of people from diverse backgrounds., • £38,000 – 44,000 salary, depending on experience (based on 37.5 hours working week). KLH are starting a 9-day fortnight trial in June with no loss of pay. The trial will run 6 months. This position is included in the 9-day fortnight trial., • 4% pension contribution based on a 5% personal contribution., • An opportunity to attend client meetings from day one, and the opportunity to take the lead on projects when you feel ready, with support from senior management., • 25 days annual leave (in addition to bank holidays) increasing by one day per year to a maximum of 28 days., • Flexible working with a minimum of 3 days a week in the office (for a full-time position). Your core office working hours can be reviewed and agreed with your line manager, depending on other life commitments you may have., • Team lunch provided every Monday in addition to office snacks and fruit., • Gym available on site at no charge to the user, with shower facilities and towel service., • Three weeks (15 days) remote working allowance each year (i.e., away from the office and your usual homeworking set-up). This is used by our employees to extend their stay at a holiday location or with family abroad and facilitates travelling at non-peak times., • 6 days a year team training provided including regular lunch time CPDs and quarterly team training., • We believe in the positive impact that we can have outside our direct project work and offer two days paid volunteering per year for employees to get involved in causes that matter to them. Additional benefits associated with extension to a permanent position post fix term contract: • Annual bonus opportunities in line with our Employee Ownership Trust status. Participation in the bonus scheme will be subject to an agreed extension to a permanent position., • Cycle to work scheme., • We are proactive in our learning and encourage employees to take ownership of their professional development. We offer:, • Payment of a professional subscription such as ISEP or CIBSE., • Personal training budget in additional to regular soft skills training and workshops with the wider team., • 5 additional training days for elective training with an allocated personal training budget., • Skilled Visa sponsorship available. What KLH do Our mission is to accelerate change by making sustainability accessible to all. KLH Sustainability are specialist consultant in the built environment. We support clients – developers, architects, contractors, and others - to take advantage of the opportunity's sustainability presents in both the short and longer term. Our pragmatic, problem solving approach adds value across a programme’s lifecycle from strategy development through to implementation and legacy. The scale of projects and the type of clients we work with is diverse; 1,500 sustainable homes on the Queen Elizabeth Olympic Park, a circular economy strategy for one of the UK’s largest housing associations, the Earth’s favourite healthy drinks factory for Innocent Drinks, a London development of ten zero waste, lifecycle carbon neutral homes and an SBTi-aligned net zero carbon strategy and associated implementation support for master developer, Urban Civic. We are a small team who are fortunate to work on large projects, where our impact can be significant. We believe honest communication and a problem-solving approach is fundamental to building strong relationships and this is reflected in the number of repeat and long-term clients we have. We are a dynamic team of professionals who believe in what we do. We consider diversity a critical factor in providing quality advice and solutions to our clients. The common thread that binds us is the KLH values that each team member embodies. Our business is committed to providing advice and making decisions that benefit the natural environment, local communities, and our work force. This is validated through our B-Corp certification. You can find more about us from our website, klhsustainability.com The ideal candidate As a small business, our job roles and functions are not restricted to a fixed set of duties. Daily activities include diverse support on project work, and all employees are encouraged to play a role in wider business management duties. There are, however few core requirements for this position: • 4-6 years’ experience working in a consultancy or practice related to sustainability and/or the wider construction industry., • Demonstrated understanding of building physics and operational energy performance, including how design decisions impact energy use and occupant comfort complimented by a broad understanding of sustainability in the built environment. Experience in complex buildings such as labs is preferrable., • Good numerical and analytical skills to undertake technical analysis., • Proficiency in at least some of the following software and programs:, • Passivhaus Planning Package (PHPP), • Design PH, • One Click LCA, • SketchUp, • Bluebeam, • IES VE, • Python, • Matlab, • Knowledge of the UK planning process, environmental legislation, and applicable Building Regulations including Part L, Part O and daylighting. Working knowledge of the Net Zero Carbon Building Standards is desirable., • An ability to interpret technical results to provide concise and meaningful recommendations to the project team on how to improve building performance., • Good written skills, including clear and concise report writing., • Comfortable working within a wide range of project teams as the sustainability voice, with the capability to adapt your communication style to a wide range of stakeholders., • Awareness of project commercial constraints such as timeliness and cost., • Comfortable in delivering presentations and facilitating workshops., • The ability to work with autonomy and take initiative while approaching other team members for support and advice as required., • A curious mind with a desire to explore ideas and learn new subject areas., • Proactive engagement with other KLHers. Offer support to meet deadlines or a chat over a cup of coffee, if someone looks like they need it! We are looking for a human not a superhero. If you do not embody all qualities listed above (yet), but they speak to you and you can relate to KLH’s mission, do not hesitate to get in touch! How to apply To apply, attach your CV and send a cover letter to . We will only accept applications via email, with the subject line “KLH Maternity Cover Application”. Please do not apply via LinkedIn Easy Apply or by message, as these will not be monitored. The cover letter should be a maximum 150 words summarising why you would like to work for KLH. Please note that due to the number of applications anticipated, applications without a cover letter will not be considered. Deadline for applications is 20th May 2025; however, we will be scheduling rolling interviews for interesting candidates, therefore you are encouraged to apply at your earliest convenience.

C++ Trading Platform Developer A leading crypto-native algorithmic trading firm is looking for a C++ Trading Platform Developer to join its London-based team. This is an opportunity to work at the intersection of high-performance engineering and digital asset markets, building and scaling a global trading platform that operates across dozens of exchanges worldwide. The environment combines the technical standards of top-tier high-frequency trading firms with the pace and ownership of a technology start-up. You’ll work on a global, low-latency trading platform spanning multiple continents, covering: • Real-time market data capture, • Order entry and connectivity across numerous exchanges, • Robust networking and monitoring systems, • Scaling and performance optimisation of core infrastructure The tech stack is primarily C++ and Python, running on Linux across both development and production. The focus is on writing clean, scalable, high-performance code and continuously improving system reliability and speed. This is a hands-on engineering role with direct exposure to traders and senior technical leadership. You’ll be given meaningful ownership from day one and the freedom to shape your impact. What We’re Looking For • Strong C++ skills (assessment will form part of the process), • Deep understanding of data structures and performance optimisation, • Experience building client-server network applications, • Curiosity to understand how C++ standard libraries and systems work “under the hood”, • Strong analytical and problem-solving ability Desirable: • Knowledge of networking, CPU architecture, memory models, or assembly, • Interest in algorithmic or quantitative trading Why Apply? • Work on genuinely high-performance, real-time trading systems, • Significant ownership and responsibility early on, • Flat structure with direct access to senior leadership, • No legacy tech, no unnecessary bureaucracy, • Performance-based compensation with strong earning potential, • Central London office with flexible working arrangements (hybrid), • Visa sponsorship and relocation support available If you’re passionate about low-level systems, high-performance C++, and building robust trading infrastructure from the ground up, this is a rare opportunity to make a direct impact in a fast-moving market.

Senior Software Engineer (Golang/Python) | Drug discovery Platform | Fully Remote, EU /UK| Base Salary Up to £110,000, plus early equity+benefits I am currently partnering with an elite engineering team building a world-class platform for decentralised and federated computing. They are solving one of the most complex challenges in modern tech: how to process highly sensitive data across global organisations without ever compromising privacy. They are looking for a Senior Backend Engineer who wants to move beyond standard applications and help architect the infrastructure for the next generation of secure data collaboration. This is a high-autonomy role where you will own the technical design and lifecycle of production services used by some of the world’s largest pharmaceutical and data-intensive enterprises. Responsibilities for the Senior Software Engineer (Golang/Python) | Drug discovery Platform | Fully Remote, EU/UK | Base Salary Up to £110,000, plus early equity+benefits • Design and evolve high-performance backend systems and APIs, primarily using Golang, with Python integrated for specific domain-driven logic., • Build and operate software that bridges the gap between Cloud and On-premise environments, utilising Docker and Kubernetes as the backbone for portable, secure workloads., • Take full-spectrum responsibility for features, from the initial architectural blueprint to production monitoring and scaling., • Enhance the observability, performance, and security of services running in distributed, resource-intensive environments where data integrity is paramount., • Work at the intersection of Engineering, ML, and Product to build cohesive, secure systems that enable "AI for good" on a global scale., • Actively experiment with AI-assisted workflows and emerging developer tools to maintain a peak-efficiency development lifecycle., • Lead by example through high-quality execution and active participation in rigorous code reviews to uphold engineering standards. Requirements for the role: • 4+ years of professional experience with a heavy emphasis on building resilient, production-grade backend systems., • Expert-level Golang skills and the ability to leverage Python effectively within complex problem domains., • A proven track record of deploying and debugging cloud-native workloads via Kubernetes and Docker., • Experience with AWS (or similar) and a comfort level working with the unique challenges of hybrid or on-premise deployments., • A strong practitioner of testing strategies, code maintainability, and secure API design., • You thrive in fast-paced, iterative environments where you can influence technical direction and navigate pragmatic trade-offs., • Fluency in English and a strong sense of accountability for technical outcomes and long-term maintainability. What is in it for you? • Competitive salary plus early-stage share options in a scaling deep-tech startup., • A remote-first culture allowing you to work from home or a local co-working space., • Comprehensive benefits including budgets for wellbeing, mental health, and home-office setups., • Dedicated stipend for co-working and a budget for continuous learning and development., • Generous holiday allowance., • Regular team summits held at their European headquarters or other international locations. If you think you are a good match for the Senior Software Engineer (Golang/Python) | Drug discovery Platform | Fully Remote, EU/UK | Base Salary Up to £110,000, plus early equity+benefits - Drop over a CV and we will give you a call if we think you are a match!

Quant Developer — C++/Python (Backtesting & Research Production) London | Full-time | On-site Systematic prop firm combining deep learning and quantitative research to trade global markets. Small, technical team — every hire directly impacts strategy and P&L. The Role Translate Python research into production C++. Build and optimise backtesting/simulation systems using L3 market data. Own components end-to-end alongside researchers and senior engineers. You • BSc/MSc from a top university in CS, maths, engineering, or physics, • 0-5 years with C++ in quant finance or data-intensive environments, • Comfortable with Python for analysis and tooling, • Builder mindset - ship fast, iterate, own problems Why Here • Deep learning meets systematic trading, • Small team, high autonomy, visible impact from day one, • Ideas move from concept to live trading quickly All applications confidential

Senior Platform Engineer – Cloud & Kubernetes London - hybrid working model. A hands-on delivery role building and operating containerised platforms on AWS or Azure. You'll work directly with enterprise clients, owning technical outcomes from architecture through to production. What you'll do Design and run Kubernetes-based platforms (EKS/AKS), write infrastructure as code with Terraform, build CI/CD pipelines, implement GitOps workflows, and lead service migrations into production. You'll produce solid documentation and raise engineering standards through the quality of your work — not through management. What you'll need Proven experience with microservices architecture, Kubernetes orchestration, cloud infrastructure (AWS or Azure), Terraform, Linux administration, scripting, and GitOps tooling (Argo CD/Flux). Must have delivered platforms into production in a client-facing context. Relevant certifications expected. Nice to have Helm, Kafka, PostgreSQL, internal developer platforms (e.g. Backstage), multi-cloud experience, Python tooling. First 6 months Ship something real within 90 days. Lead a major migration or go-live by 180 days. Become a trusted technical authority with clients and colleagues.

Quantitative Options Trader / developer London / New York We are working with a high-performing, 200-person quantitative hedge fund that is expanding its footprint across London and New York. The firm has built a reputation for combining rigorous quantitative research with disciplined execution, operating across global cash and derivatives markets. As part of continued growth, they are seeking to hire a quant dev/trader to join a collaborative trading environment focused on managing systematic strategies across vol markets. The Role You will sit between trading, research, and technology, working closely with developers and quantitative researchers to implement and optimise derivatives strategies. This is a great opportunity for individuals who combine strong coding ability with market intuition and want to deepen their understanding of volatility trading in a systematic environment. Key responsibilities include: • Monitoring and improving automated trading systems, • Supporting and, in some cases, executing derivatives trades, • Collaborating with researchers to refine and enhance volatility strategies, • Analysing performance and identifying opportunities for optimisation Required experience • 1–3+ years’ experience in derivatives trading or options system development, • Strong Python programming skills, • Solid academic background in a quantitative discipline (Maths, Physics, Computer Science, Engineering, etc.), • Strong numerical intuition and mental maths ability, • Interest in volatility trading and derivatives markets Preferred Background Candidates with experience across the following asset classes are particularly relevant: • Equities (single name or index options), • Commodities, • Fixed Income derivatives

We are seeking a highly motivated Quant Developer to join a Front Office XVA team, supporting trading desks with advanced pricing, risk, and capital calculations. This role sits at the intersection of quantitative modelling and software engineering, offering the opportunity to work on complex derivatives portfolios within a global financial environment. What You’ll Do • Develop and enhance high-performance quantitative libraries (primarily in C++) used for trade valuation and risk analytics, • Build models to simulate portfolio behaviour and future exposure profiles, • Support and improve XVA calculations, including credit risk, funding costs, and capital requirements, • Collaborate with trading desks and risk teams to ensure models reflect real market behaviour, • Contribute to tools and applications used by front office teams, including a C#-based GUI, • Work across multiple technologies including C++, Python (analytics), and C# (integration and UI) You Are • Degree in Mathematics, Physics, Computer Science, or a related quantitative discipline, • Strong knowledge in C++ development, • Solid understanding of quantitative modelling and financial risk concepts, • Knowledge of derivatives, counterparty risk, and XVA, • Experience with Python for analytics and/or C# for application development is beneficial, • Strong problem-solving skills and attention to detail, • Ability to work in a fast-paced, front-office environment Interested? If this sounds like you, we’d love to have a chat! Please apply only if you have permanent right to work in the UK. Unfortunately, we are unable to provide visa sponsorship for this role.

Role: Backend Developer (Core Java) We are seeking an experienced Backend Developer with strong expertise in Core Java to build scalable, high-performance APIs and work effectively within large, complex codebases. The ideal candidate will have a solid foundation in system architecture and will collaborate closely with DevOps and the Head of Engineering in a small, agile team. This role plays a critical part in developing and enhancing a microservices-based platform that supports risk management and backend operations for both corporate and retail trading. You will also contribute to shaping the technical roadmap and improving the Software Development Life Cycle (SDLC). Key Responsibilities: • Design, develop, and maintain high-performance backend services for complex data processing systems, • Architect scalable solutions for high-volume calculations and data pipelines, • Optimize database schemas, write efficient SQL queries, and improve database performance, • Collaborate directly with business stakeholders to define and deliver new features, • Ensure performance, reliability, and quality across all backend services, • Identify and resolve performance bottlenecks, defects, and system issues, • Adhere to best practices in engineering, including design patterns and architectural principles, • Develop and maintain unit and integration testing frameworks, • Contribute to the technical roadmap and continuously improve SDLC processes, • Support additional ad hoc technical tasks as required Technical Skills: • 5+ years of experience in software engineering with strong Core Java expertise, • At least 2 years of experience working with SQL databases, • Strong experience in API development and automation, • Familiarity with cloud platforms such as AWS, Azure, or GCP, • Experience working in Agile environments, • Hands-on experience with CI/CD pipelines and version control systems, • Experience with Python is a plus Qualifications & Experience: • Bachelor’s or Master’s degree in Computer Science, Data Science, Information Technology, Electrical Engineering, or a related field (must have), • Experience in a regulated industry, preferably within banking or financial services, • Proactive mindset with a strong sense of ownership and a focus on continuous improvement

About This team is building an AI Operating System that autonomously runs entire companies - every revenue motion, every product decision, every operational function - with compounding intelligence across all of them. The core insight: truly consequential AI requires context no outside vendor can access. Real decisions need CRM records, support tickets, customer communications, contracts, finance data, product telemetry, market signals, audit logs – dozens of dimensions, deeply connected. They’ve solved that structurally. Instead of selling software from the outside, they acquire B2B software companies and embed the system directly inside them. That gives the AI full access to live data, real feedback loops, and the organisational depth needed to encode business intuition over time. Every acquisition deepens the intelligence. Every agent compounds it. The work spans enterprise data ingestion, pipeline reliability, model orchestration, agent execution, and the practical architecture trade-offs around latency, cost, and performance. The engineering team is small today (~5, scaling to ~15), so new hires will own core parts of the system early. The founders have a strong track record, including a prior multi-billion exit. The business is already generating meaningful revenue across its portfolio. What you’ll do • Build core backend and product systems for an internal AI operating platform, • Design APIs, data models, integrations, and workflows across messy company systems, • Turn ambiguous business problems into clear technical components that can be automated, • Work across Ruby, Python, Rust, TypeScript, and React depending on the problem, • Ship production features that affect revenue, retention, and operational efficiency, • Improve reliability, scalability, and developer speed as the platform expands, • Collaborate closely with product, commercial, and leadership teams on what gets built What you’ll need • Strong software engineering fundamentals and a track record of shipping real systems, • Experience in a high-bar startup, scale-up, or top engineering environment, • Strength in backend engineering; full-stack ability is useful, • Language agnostic mindset — use the best tool for the job, • Comfort with ambiguity, fast iteration, and making sensible technical trade-offs, • Product sense and the ability to think beyond ticketsWillingness to work mainly from the London office Optional Bonus • Experience with AI products, LLM workflows, or agent-style systems, • Exposure to data-heavy platforms, ontology layers, or workflow orchestration Shortlisted candidates will be contacted within 48 hours.

Senior Software Engineer (Systems & Automation) London, Hybrid, Permanent We are partnering with a high-growth technology firm in London to find a Senior Software Engineer who excels at the intersection of product engineering and operational efficiency. This is a role for an engineer who is naturally bothered by manual bottlenecks and has the drive to automate them away. Our client is looking for a "force multiplier", someone who spends their time both shipping core product features and refining the internal engines that allow the entire engineering org to move faster. The Role This is not a siloed DevOps or Infrastructure role. You will be a core contributor to the application codebase while taking primary ownership of the workflows, tooling, and pipelines that support it. • Workflow Optimization: Identify and resolve friction in the developer experience, from reducing build times to refining CI/CD feedback loops., • Internal Tooling: Design and build bespoke automation, operational dashboards, and scripts that eliminate repetitive manual tasks across the business., • Cross-Boundary Integration: Solve complex problems that span multiple systems, including data onboarding pipelines and API integrations., • Product Delivery: Contribute directly to the core product, shipping high-quality features while ensuring the underlying systems remain robust., • Technical Initiative: Act as a self-starter who notices systemic inefficiencies and independently proposes and implements technical solutions. Technical Focus You will work across various layers of the stack, moving fluidly between application logic and the systems that deliver it. • Environment: High-scale SaaS platforms with a focus on automation and reliability., • Tooling: Expertise in modern CI/CD architectures, automated testing frameworks, and internal tool development., • Application Code: Proficiency in building and maintaining production-grade product features., • Data & Pipelines: Experience building ingestion workflows and connecting disparate internal data sources., • Stack Versatility: You are highly proficient in Python (FastAPI) and TypeScript (React/Next.js), with a solid grasp of SQL and GCP. The Profile • The Practical Automator: You have a track record of saying "this process is slowing us down" and then building the tool to fix it., • Full-Stack Mentality: You are comfortable working in application code, data pipelines, and deployment systems., • Product-Minded: You enjoy building features for end-users, but you care deeply about the engineering discipline required to ship them., • Pragmatic Ownership: You avoid abstract optimization, focusing instead on solving real, measurable operational friction.

Job Title: Full-Stack Developer Location: London, United Kingdom Type: Permanent Our client are an AI Start-Up looking to build Agentic Systems for the purpose of auditing and certification. This role would be full time on-site and wouldn't be able to sponsor visas. Responsibilities: Build, test, and ship high-quality, high-velocity code across the full stack (front-end, back-end, and AI-agent infrastructure). Collaborate directly with the co-founders to solve complex architectural problems, like how to capture an auditor's "tribal knowledge" into a self-improving, agentic system. Go beyond simple prompting: You will use LLM coding tools as a partner, understanding how to negate their weaknesses and build robust frameworks around them to maximize your output. Get hands-on with our first design partners, understand their real problems (not just what they ask for), and build solutions that they will actually use. The Ideal Candidate BSc in Computer Science or relevant subject A sophisticated user of LLM tools (e.g., Claude Code, Cursor, etc.) for coding - you understand their strengths, weaknesses, and how to build systems that leverage them effectively. Candidates can use whatever language they feel most comfortable in but ideal would be Python/React alongside heavy usage of an AI coding tool such as Claude If this sounds like it could be of interest, please apply below or reach out to

Full Stack Developer £80,000-£110,000 London – Hybrid (4 days in office, 1 day WFH) Initial contract period with perm switch after 6-12 months. A leading investment management firm is seeking a Full Stack Developer to join their lean, high‑impact technology team. In this role, you’ll build and enhance tools that automate operational workflows across treasury, collateral, FinOps, and middle‑office functions. This is a hands‑on position where you’ll work closely with risk, treasury, and operations teams to identify inefficiencies, replace legacy/manual processes, and build scalable solutions that support a fast‑paced trading environment. What you’ll work on • Automating workflows across treasury, accounting, trading and middle‑office operations., • Building tools to improve collateral & margin management, capital usage reporting, and trade reconciliation., • Designing and implementing API integrations across internal and third‑party systems., • Developing in‑house solutions to replace outsourced or legacy technology., • Creating data pipelines that improve reporting and analytics for portfolio managers., • Owning projects end‑to‑end — from gathering requirements through to deployment. What you’ll need • 5–6 years’ experience as a software engineer in financial services (buy‑side preferred, sell‑side also welcome)., • Solid background in treasury, collateral, middle‑office, or financial operations technology., • Strong programming skills in C# + Python, • Front‑end experience with Vue.js, React, or Angular., • Experience with databases such as SQL Server, Databricks, or Azure SQL., • Strong understanding of data structures, automation, and workflow optimisation., • Familiarity with Git / CI/CD pipelines., • Ability to operate independently in a fast‑moving, high‑ownership environment. Nice to have: • Experience with Broadridge, Sentry, or other treasury/risk platforms., • Exposure to data warehousing, security master systems, or trade booking automation., • Experience in quant or systematic trading environments. Why this role? You’ll have direct ownership, real influence, and the opportunity to modernise critical operational infrastructure in a high‑performing financial environment. Ideal for someone who enjoys autonomy, solving operational pain points, and building robust tools that have immediate business impact.

Here at Venator, we are working with an eCommerce company who have UK's biggest technology platform - they have a live mobile application as well as a web based application- the company is now looking to grow! Please Note- this is a hybriod role but will require you to be in the office (London) 4 days per week. You will have 20 work from anywhere days added on top which you can use to make soime weeks 2 days a week from home. Please also note - sponsorship is not an option here unfortunately. The role As a Frontend Developer, you will: • Understand complex business problems then propose and implement technical solutions, • Have input into the architecture, working closely with the Head of Technology and other senior team members, • Work with other engineers and the business to improve user experiences, • Bring your experience and enthusiasm to our engineering culture, • Promote excellence with technical mentoring, feedback, and code reviews, • Participate in planning sessions, retrospectives, stand-ups and demos, • Join us in curating a codebase to be proud of, driving for quality, maintainability and testability The candidate • You have built great products for the web and/or mobile, • You have analysed business problems then scoped and built technical solutions to solve them, • You can quickly become productive using our frontend technologies, • You’re excited about understanding the real problems working people come up against and fixing them with technology, • You can work well in small teams to deliver radical improvements, • You will be proud to show how you’ve impacted other parts of a business and delivered results, • You will be pushing frameworks and languages for good business reasons, • You stay up-to-date with developments in AI and are comfortable using AI tools to boost your productivity and problem solving The tech Our core technologies are: • Angular and TypeScript on the client side for our mobile apps and booking flow, • Next.js and React for parts of our marketing website, • Ionic for hybrid and progressive mobile apps, • Bootstrap and Chakra UI for styling, • Cypress for end to end testing, • Python on the server side, using Django Rest Framework for our API and PostgreSQL for our database, • Metabase for analysis and self-serve data exploration, • GitHub, Codeship and Heroku for seamless code review, integration and deployment, • Claude Code for agentic coding Our tech culture We follow an agile development process with fortnightly sprints. We keep meetings to a minimum, but the ones we do have are highly valuable. We strongly believe in ownership and you will be responsible for taking your features from development through to testing, deployment and design review with end users. We take code quality seriously. We have a preferred code style and we use automated linting, code formatting and other code inspection tools to detect common errors and ensure consistency. We run an extensive suite of unit, integration and end-to-end tests on every git push and deploy. Perks • Share options, • 25 days holiday allowance + bank holidays, • Flexible hours and work-from-anywhere days, • Free trial cleans and discounted recurring cleaning, • Cycle to Work scheme, • Salary sacrifice gym membership scheme, • Access to Employee Pricing Programs, • Sponsored learning, including conference tickets and travel, • Choice of hardware, OS and IDE – you do you, • Posh Christmas and Summer parties, • Tons of sponsored team socials, • Casual dress code

Blockchain is connecting the world to the future of finance. As the most trusted and fastest-growing global crypto company, it helps millions of people worldwide safely access cryptocurrency. Since its inception in 2011, Blockchain has earned the trust of over 90 million wallet holders and more than 40 million verified users, facilitating over $1 trillion in crypto transactions. We are looking for a Infrastructure Security Engineer with a proven track record in keeping systems safe. You will play a critical role in building and providing tooling that monitors our entire stack, from supporting our consumer-facing products and our institutional offerings to ensuring that we are capable of rapidly responding to cyber attacks on our colleagues and endpoints. Throughout our company, Security is a well-established mindset that leverages novel engineering approaches - as a Senior Infrastructure Security Engineer, you will lead by example and drive technical discussions with engineering teams and influence the overall architecture of our platform. Our day-to-day work is interesting and dynamic, driven by a focus on proactive threat actor identification and in-depth investigation of security issues. These practices are key to ensuring strong product security and fostering continuous, iterative improvement. WHAT YOU WILL DO: • Design, build, and implement security controls, automation, and processes across product, platform, and infrastructure environments., • Identify operational and technical security gaps, propose solutions, and drive engineering initiatives to close them., • Collaborate with the SRE and engineering teams to integrate security into CI/CD pipelines, deployment workflows, and cloud-native architectures., • Build automated tooling and services to enforce secure configurations, detect misconfigurations, and support continuous compliance., • Assist in threat modeling, design reviews, and architectural assessments for new and existing systems., • Contribute to internal security documentation, best practices, and developer guidance., • Participate in security incident response when engineering expertise or automation support is needed. WHAT YOU WILL NEED: • 4+ years of experience in security engineering, platform security, or DevSecOps roles., • Hands-on experience implementing security controls and automation within cloud environments, GCP or AWS are preferred., • Proficiency in modern scripting, automation and infrastructure as code e.g. Python, Bash, Go, Terraform, or similar., • Ability to collaborate closely with engineering teams and translate security requirements into practical, scalable solutions., • Strong analytical and problem-solving skills, with a bias toward automation over manual workflows., • Curiosity, ownership, and a drive to continuously improve the security posture of complex systems., • Familiarity with some of the following: Cloudflare (DDoS protection, WAF), OSS SIEM tools (Splunk, Elastic, etc), Incident management platforms (e.g. Incident.io, PagerDuty), • Familiarity with at least one of the following CI/CD systems (Github Actions, Concourse, CircleCI), • Familiarity with maintaining HIDS systems (Wazuh preferred). NICE TO HAVE • Knowledge of security standards and governance frameworks (e.g., CIS Benchmarks, NIST, SOC2, ISO 27001, PCI DSS) and how to operationalize them., • Hands-on experience with building and maintaining a SIEM comprised of open-source and hosted components, • Experience securing consumer-facing web and iOS / Android applications, • Experience designing policies and administering Vault & other Hashicorp products., • Experience managing security vendors COMPENSATION & PERKS • Full-time salary based on experience and meaningful equity in an industry-leading company, • This is a role based in our London office, with a mandatory in-office presence four days per week., • Work from Anywhere Policy: You can work remotely from anywhere in the world for up to 20 days per year., • ClassPass, • Unlimited vacation policy; work hard and take time when you need it, • Apple equipment, • The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an emerging field, • Flexible work culture Blockchain is committed to diversity and inclusion in the workplace and is proud to be an equal opportunity employer. We prohibit discrimination and harassment of any kind based on race, religion, color, national origin, gender, gender expression, sex, sexual orientation, age, marital status, veteran status, disability status or any other characteristic protected by law. This policy applies to all employment practices within our organization, including hiring, recruiting, promotion, termination, layoff, recall, leave of absence, and apprenticeship. Blockchain makes hiring decisions based solely on qualifications, merit, and business needs at the time. You may contact our Data Protection Officer by email at . Your personal data will be processed for the purposes of managing Controller’s recruitment related activities, which include setting up and conducting interviews and tests for applicants, evaluating and assessing the results thereto, and as is otherwise needed in the recruitment and hiring processes. Such processing is legally permissible under Art. 6(1)(f) of Regulation (EU) 2016/679 (General Data Protection Regulation) as necessary for the purposes of the legitimate interests pursued by the Controller, which are the solicitation, evaluation, and selection of applicants for employment. Your personal data will be shared with Greenhouse Software, Inc., a cloud services provider located in the United States of America and engaged by Controller to help manage its recruitment and hiring process on Controller’s behalf. Accordingly, if you are located outside of the United States, your personal data will be transferred to the United States once you submit it through this site. Because the European Union Commission has determined that United States data privacy laws do not ensure an adequate level of protection for personal data collected from EU data subjects, the transfer will be subject to appropriate additional safeguards under the standard contractual clauses. Your personal data will be retained by Controller as long as Controller determines it is necessary to evaluate your application for employment. Under the GDPR, you have the right to request access to your personal data, to request that your personal data be rectified or erased, and to request that processing of your personal data be restricted. You also have the right to data portability. In addition, you may lodge a complaint with an EU supervisory authority.

Senior C# .NET Front Office Developer | Pricing & Risk Analytics | £150k | Front Office Location: London (Central) Working Pattern: Hybrid (3 Days Office / 2 Days Remote) Sector: Global Financial Services – High-Performance Analytics Salary: Up to £150,000 + Bonus + Benefits The Mission: Architecting High-Performance Risk Engines Our client is seeking a Senior C# .NET Software Engineer to join their Analytics Development team, a group at the intersection of high-scale technology and quantitative finance. This is an opportunity to lead the design of advanced pricing and risk platforms, including a high-performance distributed computing system used for real-time market data and trading support. As a Senior C# Software Engineer, you will collaborate directly with Trading and Quantitative teams, ensuring that complex business objectives are met through robust architecture and continuous innovation. Your Impact • Architectural Strategy: Lead the design of technology solutions that form the bedrock of the firm’s analytics., • Distributed Systems: Build and optimize scalable, high-performance systems using modern C# .NET frameworks., • Best Practices: Define and uphold software engineering standards to ensure consistency and quality across the global team., • Project Leadership: Work with the Development Manager to shape the roadmap and define strategic priorities for the Analytics squad. The Technical Bar • Core Languages: Expert in C# / .NET paired with a strong proficiency in Python., • Full-Stack Visualization: Hands-on experience with React, TypeScript, and JavaScript for front-end development., • Domain Depth: A solid understanding of derivative products and risk sensitivities (Greeks)., • Cloud & DevOps: Experience with AWS, Terraform (Infrastructure as Code), and modern CI/CD pipelines., • Rigor: Proven ability in software architecture using Design Patterns, SOLID principles, and TDD/BDD. About You • The Analytical Thinker: You are a Senior C# .NET Developer with exceptional mathematical and analytical abilities., • The Collaborative Professional: You are approachable, self-efficient, and excel at building relationships with demanding stakeholders., • The Resilient Engineer: You thrive in a fast-paced environment where you take a high level of technical responsibility. Why Join? • High-Performance Focus: You will work on distributed computing systems that require deep Senior C# .NET expertise, not just standard business logic., • Modern Ecosystem: Engage in Agile ceremonies (Scrum) within a team that prioritizes robust architecture and innovative product development., • Front Office Impact: Direct visibility into the trading P&L and a seat at the table with the Quants and Traders. Senior C# .NET Front Office Developer | Pricing & Risk Analytics | £150k | Front Office

Role: We are looking for an experienced Backend Developer with strong core-java experience, skilled in building scalable, high-performance APIs and used to working with large code-bases. Proficient in designing robust system architectures, the successful candidate will work in a small team directly with the dev-ops resources and the Head of Engineering. They will play a key part in developing and enhancing a large micro-service-based bespoke code-base used to handle risk and backend operations for corporate and retail trading, as well contribute to the overall technical road-map and the SDLC. Key Responsibilities: • Develop and maintain high-performance backend services for complex data processing workloads, • Design scalable architectures for large-volume calculations and data pipelines, • Optimize database tables, write SQL queries and optimize existing database architecture, • Work directly with the business to define and deliver new features, • Ensure optimal performance, quality, and reliability across backend services, • Diagnose and resolve performance bottlenecks and defects, • Follow best-practice engineering standards, design patterns, and architectural principles, • Develop unit and integration test frameworks, • Use knowledge and experience to contribute to the technical road-map of the products, and the overall structure of the SDLC, • Any other ad hoc duties that may be required Technical Skills: • 5+ years of software engineer experience working with core-java, • Minimum 2 years working with SQL databases, • Strong API automation experience, • Experience with cloud platforms (AWS, Azure, or GCP), • Experience working in Agile delivery environments, • Experience with CI/CD pipelines and version control, • Experience with Python, a plus Qualifications & Experience: • Bachelor’s or Master's degree in Computer Science, Data Science, Information Technology, Electrical Engineering, or a related field, or equivalent experience, essential, • Experience working in a regulated industry, preferably banking or finance, • Proactive approach towards identifying opportunities for improvement and taking ownership to deliver solutions

About Indicium AI Indicium AI was Anthropic’s first European launch partner - and sits among a handful of organisations globally trusted by Anthropic to deploy Claude at enterprise scale. We are also one of the first four OpenAI partners in the UK, and Databricks Ventures has invested in our business and holds a seat on our board. Our engineers have access to the latest AI tools and models, partner technical teams, and early capability previews that the wider market does not. We are deploying production AI systems into the world's most complex organisations across Financial Services, Energy, and Healthcare. We exist to make AI a genuine competitive advantage for our clients, not in a presentation but in production. We invest seriously in our people. Every FDE at Indicium AI has access to Anthropic training, and a flexible learning budget to go with it. All of our staff are equipped with Claude licenses for Chat, CoWork and Claude Code. We are building a team of engineers who are at the frontier - and we support that with the investment to match. The Role AI is not just changing what software can do - it is changing how software gets built. The best engineering organisations in the world are rewriting their operating models around AI native development: Claude Code in every workflow, agents across the SDLC, and a fundamentally different relationship between engineers and the tools they use. Most enterprises know this matters. Very few know how to make it work. The Forward Deployed Software Engineer at Indicium AI embeds directly with client engineering teams to transform how they build software. You do not wait for a brief. You watch how a team actually works, find the problems they have not articulated yet, and ship the changes that make AI native engineering real - not as a presentation, but in their daily workflows and production pipelines. This is a role for an experienced software engineer who is passionate about how AI is transforming the craft of software engineering. You will help organisations redesign their engineering capability - from how they use Claude Code and agentic tooling, to how they structure teams, review code, test, and ship. Then you will co-engineer alongside their teams to integrate these new ways of working into their product engineering workflows. You will lead engagements at some of the most complex organisations in the UK. Technically, commercially, and in the room with engineering leaders who have built serious systems and are not easily impressed. What You Will Do • Lead engagements that transform how enterprise engineering organisations build software - from discovery and assessment through to embedded co-engineering and operational handover, • Design and implement AI native development workflows: Claude Code integration, agentic coding assistants, AI-augmented testing, automated code review, and intelligent CI/CD pipelines, • Define and roll out operating models for AI native engineering across client organisations - covering tooling, process, team structure, and best practice at scale, • Co-engineer with client product engineering teams, working shoulder to shoulder to integrate new ways of working into their existing codebases and delivery cadence, • Own the client technical relationship at senior engineering leadership level - you are the person the VP Engineering or CTO calls, not one of the people copied on the email, • Navigate organisational complexity - procurement, security, resistant teams, shifting priorities - without losing delivery momentum, • Identify and shape new opportunities within existing client relationships - commercial awareness is part of the role, not separate from it, • Codify repeatable patterns and playbooks for AI native engineering transformation that let the practice scale beyond individual engagements, • Mentor engineers on your engagements and raise the bar for the practice through knowledge sharing, • Work alongside Anthropic field teams on joint client engagements - representing Indicium AI at the highest level What We Are Looking For • 5+ years as a software engineer with strong production experience - you have built and shipped real systems, not just advised on them, • Deep passion for how AI is transforming software engineering - you are already using Claude Code, Copilot, or agentic development tools daily and have a clear view on where this is heading, • Experience in a client-facing technical role - forward deployed engineering, technical consulting, solutions architecture, or engineering leadership with external stakeholders, • Strong proficiency in modern software engineering stacks - Python, TypeScript, or Java - with comfort across cloud platforms (AWS, Azure, GCP), • Experience driving engineering process change or transformation within organisations - you have helped teams adopt new tools, practices, or ways of working at scale, • Genuine enterprise experience - you have navigated the realities of large engineering organisations: legacy systems, compliance requirements, multi-team coordination, and stakeholder management, • High agency - you do not wait to be told what to do in an ambiguous situation, you make a call, communicate it, and deliver, • Vertical depth in at least one of Financial Services, Energy, or Healthcare - enough to be a credible peer, not just a technology generalist Nice to Have • Experience with MCP server development, Claude Code enterprise deployment, or AI agent integration into development workflows, • Track record of defining engineering best practice or developer experience within a scaling organisation, • External presence - writing, speaking, or community contribution in the software engineering or AI tooling space, • Experience working alongside or within partner ecosystems such as Anthropic, Databricks, or AWS Why Indicium AI Access to leading AI Labs: Anthropic’s first European launch partner. One of the first four OpenAI UK partners. Databricks Ventures invested and on our board. Our engineers work with capabilities before the wider market does and work jointly with teams from leading AI Labs on customer delivery. We are builders: We embed, we architect, we build - and we stay until it works. Our engineers make real decisions on live systems, for clients in industries where getting it wrong has consequences. There are no layers between you and the work. Problems worth solving: No two engagements are the same. The variety and complexity of enterprise AI problems at Indicium AI is something a product company simply cannot offer. If you want engagements that test every dimension of what you can do, this is where they are. Investment in staying at the frontier: The best engineers we know are relentlessly curious - and we build an environment that supports learning and growth. Every engineer has access to leading AI training and tools, career development pathways, and a flexible L&D budget. We think that’s how it should be.

🔥 Who We Are At ___, we relentlessly drive innovation in AI, building the world's leading ___. We're looking for passionate individuals obsessed with AI, eager to make a global impact, and ready to excel in a dynamic, high-energy environment. Join ___ and help ___. 🌎 Location and Legalities This full-time Solutions Engineer position is based onsite in our brand-new ___ in London, UK, with a hybrid model of 3 days in-office and 2 days remote. Applicants must have legal authorization to work in the UK, as Ultralytics does not provide visa sponsorship. 🚀 What You'll Do As a Solutions Engineer at Ultralytics, you will be the technical face of our organization, working directly with clients to architect and deploy computer vision solutions using the ___. Key responsibilities include: • Collaborating with clients to understand their use cases and challenges, architecting end-to-end solutions using ___., • Delivering high-quality technical demos, onboarding sessions, proof-of-concepts, and workshops that demonstrate the power of ___., • Designing annotation strategies and ___ tailored to client data, goals, and deployment constraints., • Debugging client issues and delivering effective solutions with deep understanding of ___, Python, ___, and model behavior., • Supporting pre-sales efforts by participating in technical discovery calls and helping shape proposals and SLAs., • Serving as a key technical advisor during customer engagements, ensuring successful integration and continued satisfaction., • Interfacing with Sales, Marketing, Engineering, and Product teams to advocate for customer needs and influence roadmap priorities., • Acting as a strategic technical advisor to clients, shaping computer vision solutions that drive tangible business outcomes., • Representing Ultralytics at conferences, webinars, and customer events while contributing to technical blog posts and educational materials. Your strategic vision and technical expertise will be essential in supporting ___ of delivering top-tier machine learning tools and models like ___ to the community. 🛠️ Skills and Experience • 5+ years of experience in Computer Vision, Machine Learning, or applied AI roles., • Excellent client-facing skills: patient, resilient, and able to communicate clearly with technical and non-technical stakeholders., • Proficiency in Python and familiarity with the ___., • Hands-on experience with ___, ___, and classical ML/CV concepts., • Strong understanding of end-to-end ___, including data collection, preparation, ___, ___, and ___., • Experience with ___ and comfort working across Linux, macOS, and Windows environments., • Demonstrated ability to teach or mentor teams and developers through courses, bootcamps, workshops, or community engagement., • Comfort leading workshops, writing technical guides, or presenting to developer audiences. 🌟 Cultural Fit - Intensity Required Ultralytics is a high-performance environment for world-class talent obsessed with achieving extraordinary results. We operate at a relentless pace, demanding exceptional dedication and an unwavering commitment to excellence, guided by our ___. Our ___ thrives on audacious goals and absolute ownership. This is not a conventional workplace. If your priority is predictable comfort or a standard work-life balance over the relentless pursuit of progress, Ultralytics is not for you. We seek driven individuals prepared for the profound personal investment required to make a defining contribution to the future of AI. 💶 Compensation and Benefits • Competitive Salary: Highly competitive based on experience., • Startup Equity: Participate directly in Ultralytics growth and success., • Hybrid Flexibility: 3 days per week in our brand-new office - 2 days remote., • Generous Time Off: 24 days vacation, your birthday off, plus local holidays., • Flexible Hours: Tailor your working hours to suit your productivity., • Tech: Engage with cutting-edge ___ and our ___., • Gear: Brand-new Apple MacBook and Apple Display provided., • Team: Become part of a supportive and passionate ___. If you are driven to redefine the capabilities of machine learning and eager to make a significant impact, ___ offers an exceptional career opportunity.

Contract AI & Data/Jr Forward Deployed Engineer | Up to £500.00 Outside IR35 | 3 months (rolling) | Hybrid Monthly (UK) A fast-growing UK-based FinTech scale-up is looking for 2x Contract AI & Data Engineers to join their financial analytics platform team. Haven't held the title yet? No problem... if you've been doing the work, we want to hear from you. Responsibilities: • Build and maintain scalable data pipelines and AI/ML solutions, • Develop, test, and deploy data models and machine learning workflows, • Implement reporting/data solutions to ensure visibility, accuracy, and integrity, • Strong Python and SQL skills, • Familiarity with Azure or AWS, • Some exposure to ML frameworks (e.g. scikit-learn, TensorFlow, or PyTorch), • ETL/ELT pipeline experience, • Microsoft Fabric / Data Lake knowledge, • BI tools (e.g. Power BI, Tableau), • £500.00 per day Outside IR35, • 3-month contract (rolling), • Hybrid monthly - (UK) A great opportunity for a Data Analyst moving into engineering, or a Developer pivoting into the data space - if the skills are there, the title doesn't matter. **Due to high volume of applications, not all applicants will receive feedback Contract AI & Data/Jr Forward Deployed Engineer | Up to £500.00 Outside IR35 | 3 months (rolling) | Hybrid Monthly (UK)

We are partnering with a top-tier global quantitative trading firm operating at the forefront of technology, data, and financial markets. They are seeking a C++ Market Access Developer to join a world-class engineering team responsible for building and evolving ultra-low latency systems that power global trading connectivity. In this role, you will work on the core infrastructure that connects internal trading systems directly to global exchanges and liquidity venues. You will design, build, and enhance high-performance market access gateways and market data systems where precision, speed, and reliability are critical. You will take ownership of end-to-end exchange connectivity, including onboarding new brokers and venues, implementing protocol changes, and ensuring production stability of mission-critical trading flows. The work spans high-performance systems engineering, real-time optimisation, and hands-on production support in a fast-moving environment. This is a highly collaborative role working closely with traders, quants, and infrastructure teams, where engineering decisions have direct impact on live trading performance across global markets. 🧠 Required Skills & Experience 5+ years of professional C++ development on Linux Strong experience with Python and Bash scripting Proven experience designing multithreaded and/or distributed systems Hands-on experience with trading gateways or market data feed handlers Strong understanding of low-latency system design and optimisation techniques Experience working with production-grade, high-availability systems Strong debugging skills in complex real-time systems Experience with exchange connectivity, broker integration, or market access systems Solid understanding of software engineering best practices (version control, testing, CI/CD) Excellent communication and ability to work across technical and business teams

Senior Quant Developer (Python) - Equities StatArb - London - Up to £500k+ TC Custom-built, high-performance Python DAG framework powering everything from research to live execution. Same codebase, same infrastructure, zero friction between backtesting and production P&L. A global systematic investment manager ($6bn+ AUM) is expanding their Equities StatArb platform. Live since 2021, trading 24/6 globally. Unified graph-based framework (DAG) across research, production, analytics, risk, and P&L. Deep Numpy/Numba work, processing vast historical datasets and real-time tick data. You'll contribute to shared tooling that researchers actually rely on. You'll sit between researchers and the live trading desk, designing and owning critical pieces: portfolio construction, execution optimisation, transaction cost analysis. Direct line of sight to P&L. Brand new City offices. Open floor plan, non-siloed. 60% of staff have 6+ years tenure. Technology is front-line, not a cost centre—real scope for mobility between desks, strategies, and business lines. What you'll need: • 5+ years as a Quant Dev in a systematic hedge fund (StatArb/equities experience ideal), • Deep Python expertise (Numpy/Numba), • Strong grasp of statistical methods, numerical optimisation, and equity market microstructure, • Experience with Unix internals and graph-based data processing frameworks What you'll be doing: • Building and supporting complex StatArb strategies across large-scale data processing, modelling, portfolio construction, and execution, • Contributing to the design of the DAG framework used across the entire stack, • Working closely with researchers to build tooling, shared libraries, and frameworks that they actually rely on, • Taking ownership of system components in a fast-paced, agile setup Compensation is genuinely uncapped, this could go north of £500k TC for the right person. No fixed budget, just a question of fit and impact. We encourage you to apply even if you don't tick every box, proven academics, willingness to learn, and genuine intellectual curiosity count for a lot here. Note: if you haven't received a reply within 3 days, your application was unfortunately not accepted. Senior Quant Developer (Python) - Equities StatArb - London - Up to £500k+ TC

Python Developer Day Rate: £400 Outside IR35 Duration: 6-months Start Date: ASAP (No long notice periods please) Are you actively looking for your next Python contract and ready to start within the next few weeks? We're working with a Data-Driven Technology Business who are looking for additional support due to customer demands. They're looking for highly experienced Python Developers to support them during this busy period and be able to add value to their Python team. The Python Developer will need to have worked with Python, Kafka, Open APIs. They need a solid engineer who will hit the ground running and be able to get on with the tasks in hand. Experience Needed • Highly experienced Python Engineer/Developer, • Can hit the ground running and make an impact from early, • Technology needed: Python, Kafka, Flask, OpenAPI + FastAPI, • Excellent communication and collaborative skills needed Python Developer Day Rate: £400 Outside IR35 Duration: 6-months Start Date: ASAP (No long notice periods please)

Role We are looking for an experienced Principal Engineer to help scale a high-performance data processing and workflow platform used by enterprise customers. You will play a key, hands-on role working closely with technical leadership to: • Evaluate and improve backend architecture for reliability, scalability, and security, • Design core systems and abstractions to support rapid product and customer growth, • Scale infrastructure to handle increasing workloads and high-throughput processing, • Ensure robust handling of sensitive data in a secure, compliant manner, • Drive backend engineering best practices and build developer-friendly systems, • Contribute to long-term technical direction while remaining hands-on Key Skills • 8+ years of experience building and scaling backend systems, • Strong software engineering fundamentals and system design expertise, • Recent experience with Python and modern cloud infrastructure, • Experience in SaaS or product-led environments, • Exposure to working with large-scale or sensitive datasets, • Ability to design and implement scalable, secure architectures, • Comfortable contributing individually while influencing technical direction, • Pragmatic and solutions-oriented mindset Nice to Have • Experience with data pipelines or distributed systems, • Exposure to regulated environments or compliance considerations, • Familiarity with multi-tenant architectures Benefits • up to £280k + equity, • Hybrid working Next steps Please apply below or reach out directly

Location :London Contract : 6 Months + Extension Type : outside IR35 Years of Experience: 6+ JobMode- : Hybrid -3 days Maintain and improve AWS cloud infrastructure for 24/7 bank operations, focusing on stability, performance, security, and compliance Enhance connectivity between AWS accounts, client, and third parties to ensure secure and reliable customer experiences Design and create automation scripts and tooling using Bash, Python, and Go Language mandatory Build and support cloud platforms for application developers, improving SDLC and developer experience Manage vendor relationships and coordinate project efforts across business areas Participate in on-call rotation to support platform reliability Required Qualifications, Capabilities, and Skills: Formal training or certification on software engineering concepts and advanced applied experience Hands-on experience with AWS and infrastructure as code (Terraform) Understanding of AWS networking concepts Analytical and problem-solving abilities Working knowledge of Kubernetes cluster operations (EKS) Experience with service mesh technologies (Istio) Experience configuring and managing reverse proxies (Traefik, NGINX, HAProxy) Proficiency in Go programming language Understanding of network protocols (TCP/IP, DNS, DHCP, ICMP, VPN) Familiarity with network monitoring and diagnostic tools Commitment to DevOps principles and SDLC best practices

This role sits within a global, technology-driven investment firm running systematic and quantitative strategies across financial markets. The firm builds its own trading, research, and data platforms in-house. As a Quant Developer, the role bridges quantitative research and engineering. You’ll work closely with researchers to turn ideas and models into robust, scalable software used in research and live trading. This includes building tools and workflows for data analysis, backtesting, and production trading systems, as well as owning and supporting critical components throughout their lifecycle. What they’re looking for • Degree in computer science, engineering, mathematics, physics, or similar, • 2+ years’ experience with Python, C++, or kdb+/q, • Understanding of financial data, storage, and analysis, • Experience with modern software development practices, • Strong technical communication skills Nice to have • Strong quantitative skills, • Experience designing software solutions and workflows, • Exposure to CI, monitoring, and databases

My clients is seeking an experienced Quantitative Developer to design, build, and optimise high-performance trading systems within prediction markets and market-making environments. This role is suited to candidates with a proven track record delivering high Sharpe strategies in HFT or similarly latency-sensitive domains. You will work on end-to-end system development, including signal research, execution infrastructure, and real-time risk management. The ideal candidate combines strong engineering discipline with a deep understanding of market microstructure, probabilistic modelling, and alpha generation. Key Responsibilities: • Develop and maintain low-latency trading systems in Java, Python, or Rust, • Design and implement predictive models for pricing and execution, • Optimise market-making strategies across multiple venues, • Build robust backtesting and simulation frameworks, • Collaborate closely with researchers and traders to deploy live strategies, • Continuously improve system performance, reliability, and scalability Requirements: • Extensive experience in HFT, market making, or prediction markets, • Demonstrated ability to generate high Sharpe ratio strategies, • Strong programming skills in Java, Python, or Rust, • Deep knowledge of data structures, algorithms, and concurrency, • Solid understanding of market microstructure and execution dynamics, • Experience working with large datasets and real-time data pipelines, • Degree in a quantitative field (Maths, Physics, Computer Science, Engineering) Desirable: • Experience with exchange connectivity, FIX protocols, or crypto markets, • Background in statistical modelling, ML, or probabilistic forecasting, • Familiarity with Linux systems, networking, and performance tuning Location & Flexibility: • Preferably London-based, but open to remote candidates within compatible time zones This is a high-impact role in a fast-moving environment, offering significant autonomy and the opportunity to directly influence trading performance.