Software developer jobs in Reino Unido - Page 2

Back End Developer / SRE (Java JVM) London / WFH to £110k Are you a Back End Developer / SRE with a strong knowledge of Java and JVM internals? You could be progressing your career in an impactful role at a global Fintech that has been consistently voted as one of the UKs top employers. What's in it for you: • Salary to £110k + Bonus, • Pension, Private Medical Care, Life Assurance, • Option to buy or sell holiday days, • Wellness benefits and gym subsidy, • Childcare vouchers, • Enhanced paternity leave including shared parental pay and leave, • Employee led LGBTQ+, Women's, Black and Parents & Carers networks with an annual budget for organising events and projects that foster an open, diverse and inclusive culture, • Plus a range of other perks Your role: As a Back End Developer / SRE you will collaborate with development teams, as a trusted technical advisor to influence system design, ensuring reliability standards and driving improvements across the platform. You'll have a broad scope including hands-on coding (Java) to build tools and automation, incident response, observability, performance optimisation and operational excellence, working with large scale Java JVM distribution systems and message brokers such as Kafka and ActiveMQ, with a mix of on-premise and cloud (AWS) based services. Location / WFH: There's a hybrid model with 1-2 days on the London office and the rest of the week work from home; when you are in the office you'll be based in the City with an upbeat team environment, casual dress code and a range of facilities including roof terrace, canteen and break out areas. About you: • You have a strong Java software engineering background and a deep knowledge of JVM internals and performance tuning, • You have a good knowledge of Site Reliability Engineering and how to build scalable solutions to improve reliability, productivity and efficiency, • You have strong experience with message brokers (Kafka, ActiveMQ or similar), • You have experience with containerisation (they use Nomad so that would be great but any tools is fine), • You have a good working knowledge of OpenTelemetry and distributed tracing concepts, • You have experience in similar low latency production environments, improving system reliability and performance at scale, • You have a good knowledge of CI/CD and DevOps practices, • You're collaborative and pragmatic with technical leadership abilities Apply now to find out more about this Back End Developer / SRE (Java JVM) opportunity.

Reward Gateway, together with Edenred, are a global market leader in benefits and employee engagement. We help our clients and their leaders to transform employee experience that will attract, engage and retain top talent through employee benefits, strategic reward and recognition, well-being, and much more. With our shared missions of ‘Making the World a Better Place to Work” and ‘Enriching connections, For good’. You’ll be contributing to improving employee engagement and building better, stronger and more resilient organisations to improve people’s daily lives. Our shared mission guides our every action and charts a sustainable path to a better future. We’re looking for a hands-on Solutions Architect with extensive Domain Driven Design experience to contribute to shaping the future of Reward Gateway’s technology landscape. You will be part of the team defining and implementing architectural solutions that support platform modularisation, authentication, CRM and marketing integrations, and scalable system design. You’ll work with engineering and product teams to turn ideas into practical, high-impact solutions. Key responsibilities include: Authentication & Identity Strategy • Design secure, scalable authentication flows, • Lead architectural design for modular monoliths and microservices, based on the DDD approach, • Architect integrations with CRM tools (Braze, Heap.io, LaunchDarkly) and broader ecosystem, • Championing technology standards and patterns across engineering teams, • Contributing to enterprise roadmaps and technology strategy, • Guide engineering teams on architectural best practices, • Regular collaboration with enterprise architects on strategic alignment, • Partnership with security and compliance teams on governance requirements, • Produce architectural blueprints and transition plans, • Accountability for the creation and maintenance of architectural decision records., • Participate in architecture review processes and approval workflows, • Ensure compliance with enterprise architecture standards and patterns, identifying and controlling divergences from established patterns, • Escalate architectural decisions that require broader organisational input Skills and experience required: • A proven track record and senior-level expertise in software architecture roles within large-scale cloud-native platforms., • Deep practical knowledge and experience in domain-driven design, • Strong developer experience and knowledge around PHP is a nice-to-have, • Deep understanding of OpenID Connect, OAuth2, and SAML protocols, • Experience with CRM, Marketing, feature flagging, and analytics tools (Braze, Heap.io, Mixpanel), • Proven ability to lead architectural migrations and manage technical debt., • Excellent communication and stakeholder engagement skills The interview process: • Online interview with the Senior Talent Partner, • Online interview with the CTO, • Online interview with the VP of Engineering and CPO At Reward Gateway | Edenred, we are committed to ensuring an inclusive and accessible recruitment process for all candidates. If you have any specific requirements or need reasonable adjustments at any stage of the recruitment journey, please let your Talent Acquisition Partner know. Your needs are important to us, and we want to ensure an equitable experience for every candidate. Be comfortable. Be you. At Reward Gateway, we want all of our employees to feel comfortable bringing their passion, creativity and individuality to work. We value all cultures, backgrounds and experiences, as we truly believe that diversity drives innovation. Express yourself, join our community and help us Make the World a Better Place to Work.

We have a Full Stack Developer opportunity with a growing technology company building software platforms for complex, data-intensive technical workflows. The organisation focuses on developing user-facing systems that enable large-scale computational processes, replacing fragmented or manual approaches with scalable digital solutions. As a Full Stack Software Engineer, you will work across backend services and frontend applications, contributing to end-to-end feature development in a fast-moving, engineering-led environment. This Will Offer You • End-to-end ownership of features across backend and frontend systems, • Exposure to data-intensive applications and complex technical workflows, • Close collaboration with product, infrastructure, and engineering teams, • A high-autonomy role within a fast-paced development environment, • Opportunities to contribute to platform design and developer tooling, • Competitive compensation and long-term growth opportunities Your Responsibilities • Build and maintain backend services, APIs, and data-processing pipelines using Python, • Develop and extend frontend applications using Next.js and React, • Design and maintain RESTful APIs and client–server integrations, • Write and maintain unit and acceptance tests, integrating with CI workflows, • Collaborate using Git-based workflows and contribute to shared codebases, • Take ownership of features from design through deployment, • Ensure code quality, reliability, and maintainability across the stack You Will Bring • 2+ years of professional experience as a software engineer, • Strong Python skills, including building production-ready services and APIs, • Experience developing frontend applications with React and Next.js, • Understanding of RESTful architectures and backend–frontend integration, • Familiarity with modern frontend tooling (TypeScript, CSS frameworks, component-based design), • Experience writing tests and working with CI/CD pipelines, • Experience with containerisation and cloud environments, • Familiarity with developer tooling or internal platforms, • Exposure to data-intensive or ML-adjacent workflows, • Experience working with databases (SQL and/or NoSQL)

Backend Engineer (AI Platform) - London £80k–£100k + EMI equity About the Role We’re hiring a Backend Engineer to build the core infrastructure behind Revax’s AI-native platform for professional services. You’ll design, optimise, and scale the systems that power multi-agent drafting, knowledge graphs, and auditable AI workflows used by accountants, tax advisors, and consultants at leading firms. This is not a “ticket-taking” role -you’ll work directly with the founders, own critical backend services end-to-end, and help define how AI systems are built responsibly in regulated domains. If you enjoy designing clean APIs, scaling Python services, and building systems that actually ship to paying customers, this role is for you. Compensation: £80,000–£100,000 base + EMI equity Location: London About Revax Revax is building a new class of AI-native software for tax advisory firms. Today, professional services teams spend countless hours drafting, reviewing, and re-drafting work - constrained by fragmented knowledge, manual workflows, and brittle tooling. We turn a firm’s own expertise into structured, auditable, AI-powered systems that draft, analyse, and explain deliverables with full provenance. We’re a fast-moving, well-funded startup backed by leading angels, already working with major firms, and building at the intersection of AI agents, knowledge graphs, and real-world enterprise workflows. What You’ll DoBuild & own core backend systems · Build and optimise databases for complex, real-world data · Design and implement APIs using FastAPI for AI workflows and product features · Build and scale LangGraph-based multi-agent systems with checkpointing, retries, and observability · Integrate and scale vector search, knowledge graphs (Neo4j), and associated retrieval pipelines into production services · Deploy and operate GPU-backed services for AI workloads (e.g. inference, embeddings, or agent pipelines) in production Scale & operate production infrastructure · Deploy services on GCP (Cloud Run / GKE) or equivalent cloud infrastructure · Improve performance, reliability, and cost efficiency (latency, throughput, retries, backoffs) · Implement security-first patterns: auth flows, service-to-service auth, IAM, and access controls · Help prepare the platform for enterprise customers (SSO, auditability, compliance ready patterns) Collaborate closely with founders & product · Shape system architecture and API design alongside full-stack and ML engineers · Translate ambiguous product ideas into robust backend implementations · Iterate quickly based on real customer usage and feedback What We’re Looking For Essential · 2-3 years building backend systems for real users · Production experience with FastAPI (or similar modern Python frameworks) · Solid understanding of API design, PostgreSQL, and distributed systems fundamentals · Experience deploying and operating services on cloud infrastructure (GCP, AWS, and Azure) · High ownership mindset: you care deeply about reliability, correctness, and outcomes Strong Plus · Experience with LangGraph, RAG pipelines, vector databases, or knowledge graphs · Familiarity with Neo4j or graph-based data modelling · Experience working on AI-native or agentic systems · Comfort working in early-stage startups with ambiguity and speed · Experience deploying and working with GPU services for AI workloads Bonus · Exposure to professional services, finance, tax, or regulated workflows · You actively use modern AI coding tools (Cursor, Claude Code, etc.) · Strong instincts for developer experience and internal tooling Why Revax · Real ownership over core backend infrastructure · Work directly with founders on high-impact technical decisions · AI-native product with real customers and immediate feedback · Modern stack: Python, FastAPI, LangGraph, Postgres, Supabase, Neo4j, GCP · Meaningful early-stage equity: we hire owners, not passengers · A lean, low-ego, high drive team that ships fast and cares about their work Practical details · London based (strong preference for in office collaboration) · Visa sponsorship available

Back End Engineer / Developer (Rust High Frequency Trading) London / WFH to £180k+ Do you have expertise with low latency software engineering within finance or gaming environments? You could be progressing your career in a senior, hands-on Back End Engineer role at a hugely profitable High Frequency Trading firm that specialise in crypto markets and earning substantial bonuses. What's in it for you: • Salary to £180k, • Bonus (c50% of base), • Pension, • Hybrid working, • Career progression Your role: As a Back End Engineer you will design and develop high throughput back end services for microsecond real-time risk, pricing, trading engines and market making systems, working across the full software development lifecycle using Rust. You'll collaborate with a small, talented team, problem solving and working on complex and challenging systems with interesting work. Location / WFH: You'll join the team in Central London with flexibility to work from home 1-2 days a week. About you: • You have commercial Rust development experience, • You have strong backend OOP, multithreaded software engineering experience (e.g. C++, Java, Python), • You have experience of working on high throughput, low latency systems with microseconds / nanoseconds, within a finance (or games) environment, • You have a good understanding of low level system design, Operating Systems, Networking, Socket Level programming, hardware, compliers, FPGA, • You achieved a 2.1 or above in Computer Science from a top tier university, • You are collaborative and pragmatic with great communication and stakeholder management skills, also with some leadership or mentoring experience Apply now to find out more about this Back End Engineer / Developer (Rust HFT High Frequency Trading) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

Aries Global At Aries Global, we’re driven by a singular ambition - to build one of the world’s truly exceptional software groups. A high-performing culture where we’re able to deliver transformative value to our group, and a place where every team member can grow, thrive, and achieve their full potential. A company that operates with unmatched precision, creativity, and impact. That creates enduring value while upholding the highest standards of integrity and responsibility. Our mission is simple: we don’t just acquire companies - we build enduring, AI-native software platforms. We partner with founders who have built great products and help them unlock their next chapter through our AI-native operating system, centralised GTM engine, and world-class execution capabilities. We bring together exceptional operators, product builders, and leaders - people who insist on the highest standards and excel in a culture of fast pace, focused execution, and deep ownership. In return, you’ll experience extraordinary growth, meaningful impact from day one, and a career trajectory far steeper than you thought possible. Some Of Your Responsibilities • Build and ship real product features that meaningfully improve the user experience and drive business impact., • Collaborate with senior engineers, product managers, and designers to turn ideas into polished, scalable solutions., • Dive into modern technologies and development practices, learning rapidly while contributing to production-quality work., • Debug, test, and optimise systems to enhance performance, stability, and maintainability., • Participate in code reviews and team rituals to strengthen engineering excellence and learn best practices., • Explore new tools and frameworks to help the team innovate and improve developer productivity. What We’re Looking For • Analytical Foundations. A strong analytical foundation built through experience in start-ups, investment banking, PE/VC, strategy, or management consulting - environments that demand rigorous thinking, structured problem-solving, and rapid synthesis of information., • Action Bias. You thrive in ambiguity, form clear mental models quickly, take ownership instinctively, and enjoy diving deep into unfamiliar software categories. You operate with autonomy, intensity, and a strong internal drive., • Culture & Velocity Fit. You’re energized by environments defined by ambition, precision, and ownership and a high standard of integrity and responsibility., • Communication & Reasoning Clarity: You communicate in a structured, concise, and compelling way - verbally and in writing. You’re highly organized, detail-oriented, and able to manage multiple workstreams without sacrificing quality or momentum. Why Join Aries • Unmatched talent density - be amongst and learn from the brightest., • High-trust, high-autonomy environment with real ownership - exposure you won’t get anywhere else., • A company with global reach, meaningful work, and potential for long-term growth. Our Process Joining Aries Global means stepping into a culture that values excellence, curiosity, and potential above all else. Our selection process reflects that. If you excel at our initial screening, you move forward to interviews that dive deeper into your ambitions, mindset, and how you can shape growth with us. You’ll take on a few challenges designed to see how you think, learn, and adapt under pressure. They’re demanding by design - because the work we do is, too. We set the bar high and only make offers when we’re confident it’s an extraordinary fit - for both you and Aries Global. And if you’re hesitating because you don’t tick every box - don’t. Talent, drive, and the will to grow matter most here. If you’re inspired by our mission and believe you can make an impact, we want to meet you. Aries Global is proud to be an equal opportunity employer. We celebrate diversity, foster inclusion, and ensure every candidate has equitable access to succeed. If you need accommodations during the process, simply let us know, we’ll make it happen.

Senior Backend Developer – Node.js, TypeScript, Kafka - up to £70k Leading E-commerce Brand | Up to £70,000 | Hybrid (2 days/week in London) We’re partnering with a leading e-commerce business that’s scaling a modern, event-driven platform to support high transaction volumes and continued growth. They’re looking for a Senior Backend Developer to join a highly capable engineering team working with Node.js, TypeScript and Kafka. This is a hands-on role where you’ll be building and evolving distributed backend services in a fast-paced, product-focused environment. The Role • Build, maintain and improve backend services using Node.js and TypeScript, • Some experience with React, • Develop and support event-driven architecture, with Kafka at the core, • Collaborate with product, frontend and platform teams to deliver scalable e-commerce solutions, • Contribute to system design, performance optimisation and best engineering practices, • Take ownership of services from development through to production What We’re Looking For • Strong commercial experience with Node.js and TypeScript, • Practical experience working with event-driven systems (Kafka experience preferred), • Good understanding of distributed systems, scalability and reliability, • Experience working in complex backend environments (e-commerce is a plus), • A collaborative mindset and a desire to build high-quality software Salary & Benefits • Salary up to £70,000, • Hybrid working: 2 days per week in London, • Opportunity to work on a large-scale, high-impact e-commerce platform, • Modern tech stack with room to influence technical decisions, • Clear progression within a growing engineering function Senior Backend Developer – Node.js, TypeScript, Kafka - up to £70k

Top global trading firm looking for a DeFi developer to join a small, highly technical trading team building high-performance systems that operate directly on decentralized markets. The role is hands-on and focused on building production systems in Rust and Python, covering execution, on-chain integrations, and performance-critical components where latency and reliability are key. There is strong end-to-end ownership and clear visibility across the full trading stack. They are looking for someone with a solid software engineering background and several years of experience (typically around 3–7). Experience with trading systems or DeFi is beneficial but not required.

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

The immense cost and complexity of GxP validation has locked the Life Sciences industry out of the modern software and AI revolution. We are building the GxP-native foundation that lowers this barrier by orders of magnitude. But a platform alone does not change an industry. Transformation happens when software meets reality inside regulated labs, QA teams, and operations groups. This role follows the Palantir Forward Deployed Engineer model. You are the force that makes that collision productive. This is not a general developer role. You are an engineer who ships in the field. You embed with customers, understand their systems at first principles, and turn messy, high-stakes workflows into production software on our platform. You write code in real environments. You prototype. You debug. You re-architect. You ship. Most of our customers are in the US. You will travel. Often. You will sit on-site with regulated teams, observe how work actually happens, and translate that reality into robust, compliant systems. You are the person who turns “this is impossible in GxP” into “it’s live.” Your work closes the loop between the world and the platform. You uncover edge cases no roadmap can predict. You pressure-test our abstractions. You surface the primitives the core platform must support next. Every hard deployment you complete makes the product stronger for every future customer. We are a team of owners. You will not be handed tickets. You will be given missions: unlock a flagship account, prove a new workflow, make an impossible deployment succeed. Within that, you have absolute ownership over outcomes. If something is missing, you build it. If something is broken, you fix it. If something is unclear, you define it. You must like to travel. You must like being on-site. You must be hungry. This is a role for people who want to be where the hardest problems live, who learn fastest in the real world, and who measure themselves by impact, not comfort. The Forward Deployed Engineer is the spearhead of our mission. If the Palantir FDE model excites you and this intensity compels rather than intimidates you, you belong here.

Senior Python Developer / Engineer (Python AWS) London / WFH to £130k Are you a Python technologist with experience of Front Office trading environments? You could be progressing your career on the Asset Management side of a global Japanese bank as they expand this product offering within the UK. As a Senior Python Developer you will take ownership of a Greenfield trading systems build, in an impactful role that will directly affect the PnL and success of the business. You'll design, build and maintain highly performant, robust, scalable trading systems including cloud infrastructure, collaborating with front, middle and back office teams to discover requirements and deliver technical solutions that drive business growth. You will lead and deliver high profile software projects and champion best practices in software engineering, DevOps and cloud architecture across the wider technology team. Location / WFH: You'll be based in the London, Bank office three days a week with flexibility to work from home twice a week. About you: • You have advanced backend Python development skills, • You have a strong knowledge of AWS, DevOps practices, CI/CD, Containerisation, • You're comfortable with occasional front end work, • You have experience of owning the end-to-end software delivery lifecycle, are proactive in bringing solutions problems identified, • You have experience of working in Front Office trading environments, • You're pragmatic with great communication skills What's in it for you: As a Senior Python Developer / Engineer you will earn a competitive package including: • Salary to £130k + bonus, • Pension, • Career advancement Apply now to find out more about this Senior Python Developer / Engineer (Python AWS) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

About Mirantis Mirantis is the Kubernetes-native AI infrastructure company, enabling organizations to build and operate scalable, secure, and sovereign infrastructure for modern AI, machine learning, and data-intensive applications. By combining open source innovation with deep expertise in Kubernetes orchestration, Mirantis empowers platform engineering teams to deliver composable, production-ready developer platforms across any environment—on-premises, in the cloud, at the edge, or in sovereign data centers. As enterprises navigate the growing complexity of AI-driven workloads, Mirantis delivers the automation, GPU orchestration, and policy-driven control needed to manage infrastructure with confidence and agility. Committed to open standards and freedom from lock-in, Mirantis ensures that customers retain full control of their infrastructure strategy. Job Description Mirantis is inviting an experienced and client-focused Senior Solution Architect to join our dynamic client-facing technical team. You will develop trusted advisor relationships with prospects and customers by educating, presenting, demonstrating, and conducting POCs of Mirantis’ AI Infrastructure platform. This role offers the opportunity to work on ambitious, cutting-edge technology within the fast-evolving AI and cloud-native ecosystems. Responsibilities Partner with sales to support enterprise opportunities, and help customers understand the value of Mirantis’ industry-leading AI and Kubernetes-based solutions. Lead technical discovery sessions, demos, and proof-of-concept engagements with customers and partners. Translate customer requirements into solution architectures leveraging Mirantis’ products and best practices. Deliver engaging technical presentations and live demonstrations that showcase Mirantis’ platform capabilities, business value, and open-source innovation. Provide field feedback to influence product direction and go-to-market strategy. Serve as a trusted technical advisor – building and maintaining long-term relationships with client stakeholders while representing their needs within Mirantis. Represent Mirantis at industry events, conferences, and community meetups by delivering technical sessions, demonstrations, and thought leadership content. Qualifications 5+ years’ experience in a pre-sales, solutions architecture, or technical consulting role for cloud-native or enterprise software. A working knowledge of: Cloud infrastructure, including Kubernetes, OpenStack, Docker, microservices, and public cloud services (AWS, GCP, Azure) AI/ML infrastructure tools (e.g., Kubeflow, MLflow, NVIDIA AI), and how they integrate with cloud-native platforms DevOps and automation tools, including CI/CD pipelines Observability tooling, including open-source monitoring, logging, and alerting systems Strong understanding of the competitive landscape within the cloud infrastructure and open-source ecosystem. Track record of delivering outcomes for Fortune 500 clients and influencing senior IT/engineering leaders (CIO, CTO). Exceptional written, verbal, and presentation skills with the ability to communicate complex ideas clearly to technical and business audiences. Ability to travel to customer sites and events as needed. Preferred Qualifications Strong hands-on experience with Kubernetes, Docker, containers, virtualization technologies (vSphere, OpenStack), and leading public cloud platforms such as AWS, Google Cloud Platform, and Azure. Industry certifications (AWS, Azure, Kubernetes), especially Certified Kubernetes Administrator (CKA) Proven experience with enterprise-grade security, compliance, and regulatory frameworks. Comfortable operating in global, remote, and hybrid environments, with a demonstrated ability to manage complex projects across multiple teams and stakeholders. Soft Skills and Team Fit Proven problem-solving, consultative, and relationship-building skills. Entrepreneurial drive with a passion for learning and continuous improvement. High integrity, transparency, and a collaborative mindset. Additional Information What does Mirantis offer you? • Work with an established Silicon Valley leader in the cloud infrastructure industry;, • Work with exceptionally passionate, talented and engaging colleagues, helping Fortune 500 and Global 2000 customers implement next-generation cloud technologies;, • Be a part of cutting-edge, open-source innovation;, • Thrive in the high-energy environment of a young company where openness, collaboration, risk-taking, and continuous growth are valued;, • Professional development and training;, • Attend conferences and working groups;, • Company outings, happy hours, hackathons, and tech talks;, • Receive a competitive compensation package with a strong benefits plan. It is understood that Mirantis, Inc. may use automated decision-making technology (ADMT) for specific employment-related decisions. Opting out of ADMT use is requested for decisions about evaluation and review connected with the specific employment decision for the position applied for. You also have the right to appeal any decisions made by ADMT by sending your request to By submitting your resume, you consent to the processing and storage of your personal data in accordance with applicable data protection laws, for the purposes of considering your application for current and future job opportunities. We are a Leader for Container Management in G2 (#2 after AWS)!

We are partnering with one of London’s most selective and highest-performing quantitative investment funds to appoint a Senior Quant Developer to their core systematic trading group. This is a confidential mandate for a team renowned for world-class engineering standards, scientific rigour, and a culture built around high impact and low ego. The successful candidate will work at the intersection of quantitative research, data engineering, and high-performance software development — with code that moves rapidly from prototype to production and directly influences trading performance. The Role As a Quant Developer, you will: • Collaborate closely with quant researchers to productionise models and design scalable research/tooling infrastructure, • Develop high-performance, robust code across Python and C++, • Build and maintain data pipelines, research platforms, and components of the live trading stack, • Optimise system performance, reliability, and throughput across large-scale datasets, • Contribute to architectural decisions across the full research-to-execution workflow What We’re Looking For • Exceptional programming skills in Python and/or C++, with a focus on writing clean, performant production code, • Strong understanding of core CS fundamentals (algorithms, distributed systems, profiling, testing), • Experience in a systematic trading environment or quantitative data domain is highly advantageous, though not essential, • A problem-solver with the ability to work collaboratively in a highly technical, research-driven environment, • Humility, curiosity, and a desire to build systems that have real, measurable impact, • Computer Science or STEM degree from a good university Why This Role Stands Out • Opportunity to join a top-performing fund with a deeply technical culture, • Work directly with elite researchers and developers on complex, meaningful problems, • Highly competitive compensation with significant performance-based upside, • Exposure to world-class infrastructure, datasets, and compute environments, • A role where strong engineering truly drives investment performance

Android Developer (Testing-Focused) - Video Streaming We are hiring an Android Developer to join a greenfield video streaming project, building a modern SDK used across multiple native platforms. This role is best suited to an engineer who sees testing as a core part of software development, not a separate function. You'll be writing production Android code while also shaping how testing frameworks, services, and infrastructure are embedded into the platform. Key Information * Location: London * Day Rate: £600 INSIDE IR35 * Office Days: Hybrid (London) * Contract Length: 6-month initial contract • Start date: ASAP What You'll Be Doing * Developing Kotlin-based Android features for a video streaming SDK * Designing and implementing testable, maintainable Android code * Integrating Android components with existing test frameworks * Improving and expanding test infrastructure alongside feature development * Supporting physical device testing strategies * Collaborating with iOS and Roku teams on cross-platform quality * Helping define engineering and testing best practices What We're Looking For * 4+ years Android development experience (Kotlin, Gradle, Android Studio) * Strong experience writing and maintaining Android tests * Deep understanding of testable architecture and automation principles * Comfortable owning features end-to-end * Strong collaboration and communication skills Nice to Have * Video streaming experience (DASH / HLS) * ADB protocol knowledge * Experience with Swift, Go, TypeScript, or BrightScript • Device farms, Docker, WebSockets If you are available for a contract role and have the required skills, please apply online!

Senior Software Engineer (.Net & Angular) - £70,000 – £85,000 pa + 25% Bonus + Benefits I am working with a leading professional services client in London that are looking for a Senior Software Engineer with full stack capabilities to join a small but talented team. The team is responsible for maintaining and developing their core platform. This is concentrated on 3 main technologies. SQL for Data, .Net stack for microservices and Angular for front end applications. All of which are the latest releases. This is a really exciting opportunity to join a growing team, work with the latest technologies and developer your skills and career. Hybrid Working: 3 days a week in the office. Experience Required: • Expertise in C# and .NET development., • Good level of Angular development and principles (TypeScript, HTML, CSS/SCSS), • Strong SQL Server (T-SQL), • Experience of building and consuming web services and APIs (SOAP, REST using, • XML, JSON ) In line with the Conduct Regulations 2003, when advertising permanent vacancies JNC Recruitment are acting as an Employment Agency, and when advertising temporary/contract vacancies JNC Recruitment are acting as an Employment Business

Software Engineer London | Full-time | Hybrid | Shoreditch/Liverpool Street Create the Future of Travel With Us Whether it's visiting the people closest to us, starting an exciting adventure, or a career-defining business trip, travel is essential. Yet we've all experienced the aches and pains of getting to our destination. More than 4 billion airline passengers rely on technology that hasn't kept up with modern expectations. That's why we're rebuilding the infrastructure that underpins the travel industry - simplifying systems and building tools that will make the future of travel effortless. We were part of Y Combinator S18's cohort and we're backed by Benchmark, Blossom, Index Ventures, and Kima Ventures - a fantastic set of investors that has helped build some of the world's largest companies. Our London team is growing, and we're looking for talented people to join us on our journey. Engineering at Duffel We're building tools to simplify travel distribution, search, and booking through one seamless API. The technical challenge? Design a beautiful API, then integrate it with hundreds of travel providers - each with different systems and requirements - whilst delivering a fantastic developer experience. We work with Elixir, Phoenix, Kubernetes, and Google Cloud Platform, but we value strong engineering fundamentals over specific tech experience. You'll Thrive Here If: ✅ You're passionate about designing beautiful APIs and creating great developer experiences ✅ You have a high bar for code quality and API design ✅ You have opinions on good engineering standards and processes as we define ours at Duffel ✅ You think big picture - making tradeoffs between technical work and business impact ✅ You communicate clearly, articulating what you're working on and why in a structured way ✅ You thrive collaboratively - you believe in your methods but stay open to feedback and suggestions Bonus: Experience in travel, flights, hotels, or cars What You'll Get: 💰 Competitive salary + equity (you'll own part of Duffel) 🏝️ Work from anywhere policy 🛩️ Duffel travel allowance (use what we build) 🍼 Matched parental leave 🧘 ♂️ Sabbatical programme (3 months full pay) 🌎 Visa sponsorship available 🪩 Office in Shoreditch + regular team socials Why Now Matters You'll work on the core API powering millions of travel bookings. Early-stage role = outsized impact on how we build and scale.

We're building the infrastructure that makes autonomous AI safe for enterprise deployment. Not governance theatre. Not compliance checkboxes. Actual technical systems that can monitor, quantify, and govern AI agents operating with autonomy in production environments. If you've been following the trajectory from static models to agentic systems—and the corresponding explosion in risk surface area—you know why this matters now. About governr governr is the AI risk platform for regulated enterprises. We provide complete AI visibility, real-time risk eval and quantification, and audit-ready compliance docs for enterprises deploying agentic AI. We've built the industry's most comprehensive AI risk assessment framework: We're currently in active discussions with tier-1 financial institutions and have secured design partners with leading firms navigating the shift from analytical AI to agentic systems. The market timing is critical: enterprises are deploying agents at scale, regulators are demanding governance frameworks, and existing Third-Party Risk Management (TPRM) platforms have near-zero AI-risk depth. We have an estimated 18-24 month competitive window before large incumbents build comparable capabilities to stay relevant. The Role As an Agentic Developer at governr, you'll build the core systems that monitor, analyse, and govern autonomous AI agents in production. This isn't traditional software engineering with well-worn patterns. You're designing architectures for problems that didn't exist 18 months ago. You'll be responsible for: • Agent Monitoring Infrastructure: Build real-time systems that track agent behaviour across risk factors including agent-to-agent interactions, privilege escalation attempts, emergent capability detection, and behavioural drift from baseline parameters, • Risk Assessment Engine: Design algorithms that quantify AI risk in financial terms (£X exposure), map behaviours to regulatory requirements, and detect cascade failures before they propagate through multi-agent systems, • Protocol Integration: Implement monitoring for agent communication protocols (Model Context Protocol, Agent2Agent, Agent Connect Protocol) as they mature, ensuring authenticated and logged inter-agent communications, • Anomaly Detection: Develop ML systems that identify when agents exhibit unexpected strategies, attempt unauthorized actions, or drift from intended behaviour—catching issues before regulators do, • Evidence Generation Systems: Build architectures that automatically capture audit trails, decision provenance, and compliance evidence without impacting agent performance Core Requirements (Non-negotiable) Technical Depth: • 3 - 12+ years building production systems at scale • Expert-level proficiency in Python, Rust, or Go (you write systems that can't fail) • Deep understanding of distributed systems, real-time data processing, and observability architectures • Production ML/AI experience: You've deployed models, debugged their failures, and built monitoring around them • System design mastery: You can architect for reliability, scalability, and auditability simultaneously Domain Knowledge: • Understanding of agent architectures: autonomous decision-making, goal-directed behaviour, tool use, memory systems • Familiarity with AI safety concepts: alignment, interpretability, robustness, adversarial examples • Experience with monitoring/observability: instrumentation, logging, tracing, alerting in complex systems Working Style: • You ship to production regularly and own what you deploy • You write documentation that others can actually use • You thrive in ambiguity and define requirements through first principles • You communicate technical concepts clearly to non-technical stakeholders Highly Valued (Differentiated Candidates) • Publications or research in multi-agent systems, reinforcement learning, AI safety, or agent architectures • Experience at AI labs (Anthropic, OpenAI, DeepMind) or leading AI research groups, • Production experience with agents: LangChain, AutoGPT, CrewAI, or custom agent frameworks • Regulated industry background: Financial services, healthcare, or other domains with compliance requirements, • Security/threat modelling expertise: Understanding of adversarial AI, prompt injection, or system security • Real-time systems experience: Trading systems, fraud detection, or other low-latency critical infrastructure, • Open source contributions in relevant domains (AI frameworks, monitoring tools, security infrastructure) Bonus Points (Nice to Have) • Understanding of regulatory frameworks (EU AI Act, California AI, GDPR, DORA, FCA, OCC, FINRA guidance), • Experience with compliance/audit systems or GRC platforms, • Background in formal verification or theorem proving, • DevSecOps or infrastructure-as-code expertise, • Track record of technical leadership or architecture ownership Who Thrives Here You read AI safety papers for fun. You've built production systems where failure has real consequences. You're excited by the idea of being the first person to solve a category of problems that didn't exist last year. You care about getting it right, not just getting it done. When someone asks "can we monitor that?" your first instinct is to figure out how, not to explain why it's hard. You're comfortable with the early-stage start-up reality: fewer guardrails, more ownership, rapid iteration, and direct impact on company trajectory. You want to define the product, not just implement specifications. You're intellectually curious about the intersection of AI capabilities and regulatory constraints. You find it genuinely interesting that the EU AI Act requires "human oversight" but doesn't define what that means for autonomous agents. You're mission-aligned: You believe AI agents will transform how organizations operate, but only if we solve the governance problem. You want to be the person who solves it. Why Now / Why governr Market Timing: Autonomous AI is moving from research to production. McKinsey estimates $2.6T-$4.4T annual value from agentic AI. 80% of organizations report risky agent behaviours. Regulators are demanding guardrail frameworks. The infrastructure layer doesn't exist yet. We're building it. Technical Challenge: You'll solve problems that have no Stack Overflow answers. Agent-to-agent security. Cascade failure prevention across multi-agent systems. Emergent capability detection. Financial quantification of non-deterministic systems. This is legitimately hard, novel work. Category Leadership: We have 18-24 months before large incumbents build comparable depth. First-mover advantage in category creation is real. You'll help define what "AI governance" means. Team Quality: Co-founders with deep financial services + AI expertise. Advisors including Dr. Ayman Hindy, Marcel Cassard, and leading figures in AI, high frequency risk management and financial regulation. Early team of sharp, mission-driven builders. Learning Curve: You'll gain expertise in cutting-edge AI architectures, enterprise software, regulatory frameworks, and category creation simultaneously. This is one of those roles you look back on as career-defining. Impact Leverage: Every system you build enables safe AI adoption for enterprises managing billions in assets. Your code directly influences whether organizations can deploy autonomous agents responsibly. What We Offer Compensation: very competitive salary + equity in a fast-growing company with clear path to Series A Team: Reporting to Co-Founder Chief Product Officer, working directly with founders on product direction Work Environment: London, New York - focus on outcomes over presence Growth: Ownership of major product areas from day one. Technical leadership opportunities as team scales. Direct exposure to customers, investors, and strategic decisions. Resources: Modern tech stack, freedom to choose tools, Mission: Build the infrastructure that makes autonomous AI safe for society. Not many teams can say their technical work has direct regulatory impact. How to Apply If you're excited about building unprecedented monitoring systems for autonomous agents, working at the intersection of AI safety and enterprise software, and defining an emerging category—let's talk. Send your resume, GitHub/portfolio, and a brief note on what excites you about this problem space to and . Include: • Links to relevant work (code, papers, projects, or systems you've built) • What you're currently reading/learning in the AI agent space • One technical challenge you'd be excited to solve at governr We review applications on a rolling basis and move quickly for strong candidates. First round is a technical conversation with the Co-Founder, not whiteboard hazing. We're evaluating you as much as you're evaluating us. Come with questions about our technical approach, roadmap, or market positioning. The best conversations are mutual discovery. governr is an equal opportunity employer. We believe diverse teams build better products and welcome applications from candidates of all backgrounds. Ready to build the governance layer for autonomous AI? We're ready for you.

Leading Investment Bank - Software Developer - Finance Technology We’re hiring a Software Developer to join a Greenfield, next-generation Regulatory Technology platform within a leading global investment bank. This role sits within the Finance Technology – Regulatory Reporting organisation, focused on building and evolving a critical regulatory reporting platform used globally. While the platform is built around Axiom, prior Axiom experience is not required. We’re looking for strong engineers who are keen to learn a new, specialist technology and grow their skillset within a complex, high-impact environment. Full training on Axiom will be provided. You’ll work closely with international engineering teams, contributing to platform development, automation, and infrastructure, while helping drive modern engineering practices across a mission-critical system. What You’ll Do • Build and support a Greenfield, next-generation regulatory reporting platform, • Develop and maintain backend services, tooling, and automation supporting regulatory processing, • Implement platform upgrades, releases, and security patches across global environments, • Coordinate testing cycles with engineering and delivery teams, • Expand CI/CD, test-driven development, and release automation practices, • Contribute to architectural decisions, standardisation, and platform design, • Support a high-availability, business-critical regulatory reporting system Skills & Experience • 2–5 years’ experience as a Software Developer or Engineer, • Strong Python development skills, • Solid Linux / Shell scripting experience, • Database development experience (Sybase or other relational databases), • Understanding of application infrastructure and system architecture, • Experience designing and building web-based applications, • Background working in large-scale, enterprise environments Nice to Have • Interest in regulatory systems, financial platforms, or enterprise technology, • Exposure to CI/CD tooling (e.g. Jenkins) and Agile delivery methodologies, • Strong SQL and ETL knowledge, • Experience with database performance analysis and tuning, • Axiom experience is a plus, but not essential – full training provided This is an excellent opportunity for engineers looking to learn a niche, in-demand technology, work on a next-generation platform, and develop their career within one of the world’s leading investment banks.

Software Developer / Engineer (C# .Net SQL) to £180k+ Are you a technologist with a record of academic achievement? You could be progressing your career working on complex and challenging systems at a Hedge Fund with over $17 billion under management. As a Software Developer you'll collaborate with a team of highly intelligent technologists and finance professionals to develop algorithmic trading systems working with a modern tech stack, with opportunities for technical ownership from day one. You'll partner with Quant teams to help architect valuation, risk and pricing systems, delivering massively scalable, high performance streaming compute operations. You'll be equipped with all the latest kit to help you succeed as well as learning from industry experts on world finance. Location / WFH: You'll join the team in fantastic London (Soho) based offices that offer a wide range of facilities including nutritionally balance breakfast, lunch and all day snacks. Please note this role is full-time office based (Monday to Friday). About you: • You have an outstanding record of academic achievement - minimum 2.1 in a STEM discipline from a top tier university (i.e. Russel Group or top 100 global university), backed by A grades at A-level, • You have advanced C# .Net programming skills including .Net Core (will also consider Java, Python or C++ background if happy to use C# going forward), • You have a strong knowledge of SQL databases, • You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Design Patterns, Algorithms, • You're entrepreneurial with good business acumen, keen to take ownership and lead projects, • You're collaborative, enjoy problem solving and sharing ideas What's in it for you: As a Software Developer / Engineer you will earn a competitive package: • Salary to £180k, • Significant bonus earning potential, • Fund performance share, • Personal training budget and mentoring, • Family friendly benefits that include unlimited emergency backup childcare as well as care for elderly relatives, • Various social groups including sports teams, • Private healthcare and wellness activities Apply now to find out more about this Software Developer / Engineer (C# .Net SQL) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

See here for more info: ⚡ TL;DR Description: We are building the go-to AI services company for healthcare Role: Forward Deployed AI Engineer, who can help us discover, gain clarity and build AI solutions for healthcare clients. We want to answer the question of what patient care looks like in the AI age. Role Overview The Forward Deployed AI Engineer role at Sanctuary Health is a pivotal, both forward-deployed work and internal developer role responsible for the end-to-end lifecycle of technical solutions, from deep-dive customer discovery and project scoping to delivery and eventual internal productisation for future customers. This role will be crucial in ensuring long-term system scalability and stability of Sanctuary’s technical products, requiring a high degree of independence and proficiency in applying AI models in products. The ideal candidate embodies an entrepreneurial spirit demonstrating proactivity, idea generation, and comfort with fast learning, ambiguity, and regular pivots. Responsibilities • Customer facing projects, including Forward Deployed work. Discovery, scoping and delivery of these projects, working with customers to understand their technical problems deeply and build software solutions to resolve., • Internal productisation of customer projects. Taking capabilities created for customer work and building these out into products to then be sold on to future customers., • Work on internal systems to ensure long term scalability and stability for customers., • Support ongoing customer facing and internal product and system maintenance. Requirements Required, technical: • 2 years working with LLMs, RAG, and/or voice AI., • 3 years experience in Typescript, • 3 years experience in React, • NextJS, • Tailwind, • Express, • PostgreSQL, • GraphQL, • Retrieval Augmented Generation systems, • Ability to travel, at short notice, sometimes for extended periods (e.g. 4 weeks), • Experience operating independently to investigate and resolve complex issues, • Entrepreneurial attitude to work, including proactivity, idea generation, flexibility and agility, • Discretionary effort in work, seeing it as an exciting venture not a day-job, • Willingness to learn fast and off your own back, • Comfortable with ambiguity and regular pivots; we know the direction we’re heading, but not where we’ll end up 🌤️ Benefits: • Generous holiday allowance 🌴, • Hybrid working (twice per week in-office), • New tech will be provided 💻, • WeWork ‘All Access’ setup (and associated perks), • Company pension contributions

Captur helps software understand real world scenes in real-time with an SDK for flexible, on-demand visual recognition. We’re a small, rapidly scaling team backed by top-tier investors; we recently closed a $6M seed round to accelerate product and go-to-market growth. We are global leaders in edge ML and have validated +150M images on-device for enterprise customers such as Lime. Next, expanding as a horizontal platform across use cases that require real-time speed, high volume and coverage across a wide range of mobile devices. Role Snapshot We’re hiring a hands-on Head of Product — the solo product lead today, with a Product Designer reporting to you. You’ll own the roadmap, ship high-impact SDK features, design pilots, build repeatable product processes and recruit our first PM. You’ll work closely with Sales/CS/Engineering and be the product voice for customers. This is a rare chance to scale a product function from the ground up and directly influence ARR. This role reports directly to the CEO (based in New York) — expect fast decisions, visible impact and a close partnership with the founder. The ideal candidate will have a strong background in product management, excellent leadership skills and a proven track record of bringing successful AI products to market. Key Responsibilities Product Strategy & vision (30%) • Define and communicate the product vision and strategy working alongside the CEO, • Own the full product lifecycle: you’ll be our sole product lead day-to-day and accountable for product outcomes., • Ship reliably: write concise, testable specs and acceptance criteria, enforce ticket hygiene, unblock Engineering, publish release notes and run short post-release reviews (PRRs) to validate outcomes., • Hire, onboard and mentor the first Product Manager (target end of Q2); create the PM JD, interview plan and a 30/60/90 onboarding., • Design experiments that measure monetisable outcomes (conversion, pilot → paid, ARR influence). Own hypothesis, experiment design and go/no-go decisions., • Design convertible pilots with Sales/CS: define success criteria and deliver the evidence pack (dashboard, playbook & acceptance tests). Product owns the evidence pack; Sales/CS own negotiation and contracting., • Act as product sponsor on strategic pilots to remove technical blockers and shorten time-to-value. What Success Looks Like (First 6 Months) 30 Days: Stabilise and prioritise • Rapidly map the product surface, backlog, active pilots and outstanding technical debt; meet customers and Sales to surface urgent blockers., • Deliver a 30/60/90 plan to the CEO that includes one priority revenue experiment and a pragmatic triage of the top 5 product issues to fix immediately., • Ship 1–2 high-impact fixes or small features that demonstrate clear business value or shorten pilot time-to-value., • Put in place the minimum viable product rhythms (weekly planning, weekly sync, short PRR checklist) and enforce them for the team., • Own a pilot/feature with a validated outcome (go/no-go) and a recommended roadmap change., • Codify at least three lightweight process artifacts the team uses (e.g. scoping template, release checklist, decision log)., • Product rhythms are running consistently and the team adheres to the decision log., • Multiple validated experiments and an evidence-pack library for pilots., • Demonstrable product contribution to pilot → paid or clear ARR influence. Core Requirements • Typically 7+ years’ product management experience shipping enterprise AI/SaaS features, ideally at fast-moving startups (Series A–C); we prioritise scope and outcomes over exact years., • Proven solo product leadership — you’ve been the primary product lead on a product area and have hired or mentored PMs., • Hands-on SDK / developer-facing experience — shipped SDKs/APIs (iOS, Android, React Native), sample apps, docs and integration guides., • Experience shipping ML/AI features to production; you understand model outputs, evaluation and basic monitoring., • You write short, testable specs, enforce ticket hygiene and own acceptance criteria., • Commercial orientation — you’ve supported pilots with measurable commercial outcomes (conversion, ACV, trial → paid)., • Excellent communicator; comfortable reporting to a product-focused CEO and working asynchronously across time zones., • Based in the UK (London preferred) and able to work from our London office at least 1 day per week.

Senior Python Quantitative Developer sought by a specialist and multi-award-winning Systematic Hedge Fund in a brand-new Core team designing and implementing a greenfield centralised Python/SQL/Linux/Docker platform for Backtesting, Pricing, Risk and Performance to be used across all Funds and Investment teams. Our client is an early Quantitative Investment Firm, managing around $10BN+ and with a focus on Scientific Investing and new ideas. They also boast a rare and highly reputable culture and working environment geared towards collaboration and communication, with zero siloes, and industry-leading tenure. The firm totals around 150 staff, all of whom are office-based three or more days per week. This is a more technical Senior QD role which will involve collaborating with Quantitative Researchers and Portfolio Managers to architect, design and implement scalable solutions, addressing complex business needs. Primarily, you will be charged with delivering and maintaining critical components of the investment infrastructure, including the Data Interface Layer, Central Risk Calculations, and Backtesting Frameworks which will be a key tool for the Investment teams. Essential Skills & Experience: • Excellent Python skills, as per 5+ years of professional experience in a technically and/or scientifically complex and competitive environment, especially in Financial Markets., • Hands-on experience with continuous integration and delivery systems such as Jenkins and GitLab CI/CD and a strong understanding of Software Development Life Cycle (SDLC) best practices., • Knowledge of SQL for database management and query optimization., • Proficiency in Linux and Docker, ideally including system administration and containerization for deployment and scaling. Preferred Skills & Experience: • Quantitative Finance experience and knowledge strongly preferred, most especially to include a deep understanding of Futures and Systematic Trading, • Experience in developing financial Backtesting systems for Quantitative Strategies., • PhD/MSc level education in a numerate discipline from a top institution., • MATLAB experience highly desirable. This is an outstanding opportunity to join a world-class boutique Systematic Investment business, playing a key role in the delivery of a crucial core platform for use by cross-functional teams across multiple investment platforms.

Full Stack Engineer | Algo Trading | London (On-site 5 days per week) I'm partnered exclusively with a Trading firm in London who are looking for a Full Stack Developer to join their algo trading team, helping to deliver a next generation trading and analytics platform. Previous experience working within a trading environment is highly preferred! What you’ll be doing • Building and shipping full-stack features across UI, backend services, APIs and data, • Taking ownership of work from idea → implementation → deployment, • Working closely with quantitative developers, researchers and traders What you need • 1–3 years’ commercial software engineering experience, • Strong Python experience on the backend, • Frontend experience with React (or similar modern frameworks), • Familiar with APIs, databases, Git and CI/CD, • Prior exposure to trading or financial services is beneficial What you'll get • Up to £120k base salary plus PnL focused bonus, • Direct impact on live algorithmic trading systems, • Greenfield platform work with real ownership, • Fast moving, high-bar engineering environment, • Excellent compensation and benefits 📩 If this sounds like you, apply here or drop me a message.

A Top-tier London quant fund is hiring a Quantitative Developer to build its reporting and analytics platform that delivers real-time trading insights to hundreds of researchers across all their asset classes. If you've already been writing production code in a systematic trading environment, you know what this means: resilient tools that quants and traders depend on to understand PnL, monitor strategies, and make decisions fast. This is your chance to move from feature work to owning the analytics infrastructure that shapes how an entire research organization sees its performance. What You'll Own: • Production reporting tools in C# and React used across all desks, • Analytical dashboards that turn performance data into trading insights, • The platform roadmap - you decide what gets built next, • End-to-end ownership from design through deployment, • Engineering standards that let the firm scale fast What You Bring: Experience • 3+ years building production software, • Background in quantitative finance or trading environments preferred Technical Skills • C# and Python, • React, • SQL

Software Engineer London | Full-time | Hybrid | Shoreditch/Liverpool Street Create the Future of Travel With Us Whether it's visiting the people closest to us, starting an exciting adventure, or a career-defining business trip, travel is essential. Yet we've all experienced the aches and pains of getting to our destination. More than 4 billion airline passengers rely on technology that hasn't kept up with modern expectations. That's why we're rebuilding the infrastructure that underpins the travel industry - simplifying systems and building tools that will make the future of travel effortless. We were part of Y Combinator S18's cohort and we're backed by Benchmark, Blossom, Index Ventures, and Kima Ventures - a fantastic set of investors that has helped build some of the world's largest companies. Our London team is growing, and we're looking for talented people to join us on our journey. Engineering at Duffel We're building tools to simplify travel distribution, search, and booking through one seamless API. The technical challenge? Design a beautiful API, then integrate it with hundreds of airlines - each with different systems and requirements - whilst delivering a fantastic developer experience. We work with Elixir, Phoenix, Kubernetes, and Google Cloud Platform, but we value strong engineering fundamentals over specific tech experience. You'll Thrive Here If: ✅ You're passionate about designing beautiful APIs and creating great developer experiences ✅ You're interested in working with Elixir (previous experience not required—we value strong engineering fundamentals over specific languages) ✅ You have a high bar for code quality and API design ✅ You have opinions on good engineering standards and processes as we define ours at Duffel ✅ You think big picture - making tradeoffs between technical work and business impact ✅ You communicate clearly, articulating what you're working on and why in a structured way ✅ You thrive collaboratively - you believe in your methods but stay open to feedback and suggestions Bonus: Experience in travel, flights, hotels, or cars What You'll Get: 💰 Competitive salary + equity (you'll own part of Duffel) 🏝️ Work from anywhere policy 🛩️ Duffel travel allowance (use what we build) 🍼 Matched parental leave 🧘 ♂️ Sabbatical programme (3 months full paid) 🌎 Visa sponsorship available 🪩 Office in Shoreditch + regular team socials Why Now Matters You'll work on the core API powering millions of flight bookings. Early-stage role = outsized impact on how we build and scale.

Job title: C++ 20/23 Software Engineer Client: Elite Tech Driven Trading Firm Salary: Up to £200k + Bonus Location: London (Hybrid Working) Sells: Cutting-edge tech, ownership of multiple greenfield projects, no red tape, gold medal Olympiads, exceptional technologists, option to research and develop your own models, a friendly/collaborative environment, beautiful offices. An Elite Tech Driven Trading Firm is looking for a highly talented C++ Software Engineer to join an elite group of individuals This team have an unlimited tech budget, promote a great culture and are made up of fantastic like-minded technologists! Role: They’ll find the best team to suit your skillset/interests but you could be working on: • Some of the world’s most performant ML pipelines that deal with millions of data points every second, • Building software solutions/products with scale, reliability and latency considerations in mind Skills: • 2 - 15 years of experience as a C++ Developer, • Strong knowledge of optimization/performance, • An interest in Rust is a nice plus, • Experience working at a large scale scale

Technical Quantitative Developer / Software Engineer with deep Computer Science expertise applied to Python, its libraries and ecosystem as well as professional experience with SDLC tooling, Linux, Docker, and SQL sought to join a specialist London Headquartered Quantitative Hedge Fund. You will join as a more junior member, as part of a small team designing and implementing a central platform for Backtesting, Pricing, Risk and Performance, to be used across all Funds and Investment teams. Finance experience is not an essential criterion. This new, core team collaborate with Quantitative Researchers and Portfolio Managers to design and implement scalable solutions, addressing complex business needs, in particular delivering and maintaining critical components of the Investment Infrastructure, such as the Data Interface Layer, Central Risk Calculations, and Backtesting Frameworks, to be used by diverse Investment teams as part of their daily work. The target architecture will be written in pure Python, with SQL RDBMS, a Dockerised On-Prem RedHat Linux platform. Python is the primarily required skill, however solid professional profiency of building and shipping software in Linux/Docker environments as well as SDLC tooling such as GitLab CI/CD are also required. In return for your Computer Science and Engineer nous, full training on the Quantitative Finance, Hedge Funds and Systematic Investing will be provided. Essential Skills & Experience: • Undergraduate degree in Computer Science, Computing, Software Engineering or similar with top grades from a reputable institution. MSc or possibly PhD level academics in said subject(s) preferred., • Strong Python skills, as per 3+ years of professional experience in a technically and/or scientifically complex and competitive environment., • Proficiency in Linux and Docker including system administration and containerization for deployment and scaling., • Hands-on experience with continuous integration and delivery systems such as Jenkins and GitLab CI/CD and a strong understanding of Software Development Life Cycle (SDLC) best practices., • Knowledge of SQL for database management and query optimization. This is an outstanding opportunity to join a world-class boutique Systematic Investment business, playing a key role in the delivery of a crucial core platform for use by cross-functional teams across multiple investment platforms.

Java Developer Join a high-impact Core Technology team at a leading hedge fund. About the Company This firm is a major player in the space, a multi-strategy hedge fund with a strong focus on systematic and quantitative trading. Founded by industry veterans, it combines deep financial expertise with advanced software engineering to manage institutional capital globally. What You’ll Do • Design and build high impact internal systems using Java, • Own projects end-to-end: from architecture to deployment, • Collaborate with analysts to solve real-world business problems, • Support and mentor junior team members on coding and data skills, • Deliver clean, maintainable, and scalable solutions Who They’re Looking For • 1-5 years of experience with Java (essential) and Python, • Familiarity with databases, (e.g. SQL Server, Postgres), • Experience with developing, testing, or deploying with cloud providers (e.g. AWS,, • GCP, Azure), • Excellent problem-solving skills and clean coding habits, • Prior experience in finance, or high-performance environments 📩 Apply now! If you don't hear back within three working days, unfortunately, your application has not been successful.

Quantitative Developer – HFT (C++) | Ultra-Low-Latency Trading | High-Performance Systems We are looking for an experienced C++ engineer to join a high-performance trading team focused on building ultra-low-latency systems that operate at global scale. This is a unique opportunity to work on cutting-edge technology where every nanosecond counts. ⭐ The Role As part of the HFT team, you will: • Design, develop, and optimize latency-critical C++ systems for trading, market data, and infrastructure., • Work on end-to-end ultra-low-latency architectures, including kernel-level tuning, network optimization, and highly efficient system components., • Collaborate with FPGA engineers and hardware teams to integrate hardware and software pathways., • Profile and fine-tune performance across CPU, cache, and memory layers, ensuring maximum efficiency., • Contribute to the evolution of a high-throughput, front-office tech stack. 🎯 What We’re Looking For • 5+ years of experience in performance-critical C++ (C++17 or newer)., • Strong expertise in systems programming, memory management, and CPU architectures., • Deep knowledge of Linux internals, kernel parameters, and low-level profiling., • Passion for high-performance computing, networking, and hardware-software optimization., • Experience in systematic trading, HFT, or quantitative environments is a plus., • Proven ability to architect, optimize, and scale ultra-low-latency systems. 🌍 Why This Opportunity Is Exceptional • Work in a front-office, revenue-driving engineering environment., • Build and optimize state-of-the-art HFT systems across software, FPGA, and infrastructure., • Join a culture that values innovation, autonomy, and technical excellence., • Direct impact on strategy performance and technology evolution., • Opportunities to work in global offices. If you’re a C++ engineer excited by ultra-low-latency systems, HFT, and high-performance software design, this is a rare opportunity to make a tangible impact on a top-tier trading desk.

React Front-End Developer Canary Wharf – Three days a week in the office. £550 - £600 a day (Inside IR35) We’re pleased to be working with one the largest financial institutions in the world as they look for multiple UI Software Engineers to support a key team build & expand their existing platform & services. The contracts will be an initial 6-9 months with a high expectation that they will be extended further. The right candidates will be responsible for implementation of new functionality across the platform, working with engineers, testers and product managers to deliver high-quality, scalable UI solutions. What we’re looking for: • Extensive experience with React & TypeScript, • Strong understanding of front-end architecture, • Experience working with API’s & git-based workflows, • Experience working within a regulated environment (banking/finance) preferred but not essential. If you’re interested in the position, please apply & your CV will be reviewed over the next day or two.

Senior C++ Developer / Engineer (C++ Rust Low Latency Trading) London / WFH to £180k+ Are you a Senior C++ Developer to progress your career and transfer your skills to Rust? You could be joining a hugely profitable High Frequency Trading firm that specialise in crypto markets and earning substantial bonuses in a senior, hands-on Senior C++ Developer role. What's in it for you: • Salary to £180k, • Bonus (c50% of base), • Pension, • Hybrid working, • Career progression Your role: As a Senior C++ Developer you will design and develop high throughput backend services for microsecond real-time risk, pricing, trading engines and market making systems, working across the full software development lifecycle using Rust (and some C++ for legacy systems). You'll collaborate with a small, talented team, problem solving and working on complex and challenging systems with interesting work. Location / WFH: You'll join the team in Central London with flexibility to work from home 1-2 days a week. About you: • You have strong backend OOP, multithreaded software engineering experience with C++ and are comfortable working with Rust going forward, • You have experience of working on high throughput, low latency systems with microseconds / nanoseconds, within a finance (or games) environment, • You have a good understanding of low level system design, Operating Systems, Networking, Socket Level programming, hardware, compilers, FPGA, • You achieved a 2.1 or above in Computer Science from a top tier university, • You are collaborative and pragmatic with great communication and stakeholder management skills, also with some leadership or mentoring experience Apply now to find out more about this Senior C++ Developer / Software Engineer (C++ Rust High Frequency Trading) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

Who We Are At CloudHQ, our mission is to deliver flexible, efficient, and resilient data center solutions to businesses worldwide. Founded by a pioneer in data center REITs, we are a rapidly growing organization with state-of-the-art data center sites globally, with locations in Ashburn, London, Frankfurt, Paris, Milan, Osaka, São Paulo, and more. As we embark on an exciting phase of global growth, we are building a diverse and talented team to drive our success and help shape the future of mission-critical infrastructure at CloudHQ. Role Overview The Associate Electrical Engineer, Development will lead the design, planning, and execution of highly efficient and scalable electrical systems for developer-led data center projects. This critical role focuses on providing technical leadership and oversight across the entire development lifecycle, including concept design, detailed engineering, installation, and commissioning phases. The successful candidate will act as the trusted expert for high-voltage electrical systems, power distribution configurations, redundancy solutions, and operational optimization within hyperscale environments. This role requires advanced technical proficiency, project leadership experience, and the ability to collaborate across multidisciplinary teams to deliver resilient, energy-efficient data center infrastructure for global cloud service providers. Key Responsibilities • Technical Leadership in Electrical Systems Design, • Serve as the technical authority guiding the development and implementation of electrical systems, including:, • High-voltage power systems, • UPS systems (Uninterruptible Power Supply), • Switchgear configurations and redundancy solutions, • Transformers, busbars, and power distribution panels, • Emergency backup generators, • Lead the development of electrical specifications, ensuring all systems meet CloudHQ’s standards for reliability, scalability, and energy efficiency., • Conduct and review advanced calculations on load distribution, fault currents, and energy usage to optimize designs for hyperscale environments., • Manage electrical infrastructure across early-stage design, and procurement phases of data center projects., • Provide guidance to Pre-Development and Development teams to integrate electrical systems into early-stage master planning, feasibility studies, and land acquisition specifications., • Review and evaluate contractor and vendor proposals to ensure compliance with project-specific electrical design requirements., • Collaborate with internal and external engineering teams to ensure seamless integration of electrical systems with mechanical, ICT, and tenant-specific systems., • Lead design team meetings, presenting actionable insights and guiding technical decisions around electrical scopes., • Ensure designs adhere to European building codes, ISO safety directives, and ASHRAE energy efficiency standards., • Monitor and implement standards for energy optimization and carbon reduction in electrical systems, achieving low PUE targets across data center projects., • Oversee factory witness testing for critical electrical equipment, ensuring functionality and compliance before delivery to the site., • Supervise electrical system commissioning, including system validation under peak load conditions to verify operational stability and reliability., • Research emerging technologies such as AI-driven power optimization systems, microgrid integration, and smart energy monitoring, incorporating these innovations into new projects., • Identify opportunities for improving electrical redundancy strategies and fault tolerance capabilities to ensure uptime in mission-critical environments., • Implement IoT-based infrastructure to enable real-time performance monitoring and predictive maintenance for electrical systems. Skills & Experience Technical Expertise Advanced knowledge of electrical systems for mission-critical facilities, including high-density power distribution, backup power integration, and fault tolerance strategies. Proficiency in electrical load calculations, short-circuit analysis, and power path optimization for hyperscale environments. Familiarity with electrical equipment such as: • UPS configurations, • High-voltage transformers, • Switchgear systems and breakers, • Emergency generators and fuel systems, • Busway systems for large-scale distribution panels Software Skills • Expertise in electrical design and analysis tools, including:, • AutoCAD, • Revit, • ETAP for power system modeling, • Other BIM platforms for integrated design coordination. Compliance Knowledge Thorough knowledge of European electrical standards, such as IEC, DIN, ISO, and ASHRAE TC9.9 for mission-critical facilities. Strong understanding of environmental regulations related to electrical system design for energy-efficient operations. Project Management Skills Proven ability to manage multiple data center projects simultaneously while maintaining strict timelines and budgets. Skilled in developing technical reports, progress documentation, and compliance certifications for audits and regulatory submissions. Collaboration & Leadership Exceptional communication skills for stakeholder engagement, team mentoring, and technical presentations to diverse audiences. Ability to guide multidisciplinary teams and influence technical decisions during complex project milestones. Flexibility & Travel Willingness to travel across Europe for on-site inspections, commissioning oversight, and stakeholder meetings, with travel requirements up to 50%. Preferred Qualifications Education: Bachelor’s or Master’s Degree in Electrical Engineering, Power Systems, or related technical fields. Certifications: Professional certifications such as PMP, LEED AP, CEng, or equivalents are highly desirable. Experience: Minimum 10+ years’ experience in designing and delivering electrical systems for developer-led data center or mission-critical projects. Languages: Proficiency in English; fluency in German, French, or other European languages preferred for regional collaboration. At CloudHQ, we deliver cutting-edge data centers that power the modern digital economy. As an Associate Electrical Engineer, Development, you’ll lead the creation of resilient electrical systems for hyperscale environments, collaborating with global experts to build highly efficient infrastructure solutions. Join our growing team and help shape the future of mission-critical technology development in Europe. Visit our LinkedIn page or contact for more information.

Job Title: Big Data Developer Location: UK Experience: 2–5 years Education: Bachelors in Science (IT/Computer Science/Engineer) Employment Type: Full-Time UK based candidates only. Essential skills required : • Designing and implementing the systems of the software., • Load operations by using Extract Transform (ETL Process)., • Developing systems for collecting and processing the data., • Should have the ability to research new methods for gaining valuable data and improving its quality., • Developing structured data solutions by using multiple programming languages and tools., • Developing data architecture that meets the needs of the business., • Collaborating with the other team members, data analysts, and data scientists., • Mining data from various resources to construct efficient business models. Soft skills required : • Developing, maintaining, testing, analysing, and evaluating a company's data., • Gathering large amounts of data from multiple sources., • Ensuring data pipelines are scalable, secure, and able to serve multiple users., • Converting structured, unstructured, and semi-structured data into actionable insights for a business. Educational Criteria : • Bachelor’s degree in computer science, Maths, IT, statistics or physics related field., • You should be entitled to work in the UK with legal work authorization status., • Must be willing to travel within the UK as per project/client requirements., • Excellent communication skills and teamwork skills.

Senior C++ Developer / Software Engineer (Linux SQL C++17) London / WFH to £110k Global-leading FinTech is seeking a Senior C++ Developer to take ownership of strategic enhancements on their core platform, as well as directly on bespoke client projects. The organisation is a pioneer in the field of cross-asset securities and derivatives post-trade processing technology, and have created ground-breaking, adaptable software that produces secure and scalable solutions for peak operational efficiency and optimum business performance for their clients. This is a great opportunity to accelerate your career alongside established business and technology leaders, and gain / deepen your finance experience. As a Senior C++ Developer, you'll be responsible for designing and building unique technical solutions, meeting user requirements and contributing to the evolution of the cutting-edge platform. Not only can you take advantage of working in a modern, technology-driven environment, but you will be granted a great deal of autonomy across the full development lifecycle, influencing key technical decisions and working with a highly collaborative, experienced team. Location / WFH: You'll join colleagues in the London office three days a week with flexibility to work from home the other two days. About you: • You have strong C++ development experience on Linux or UNIX, C++14 and above, • You have good SQL skills, • You're a passionate technologist who is motivated by working on cutting-edge systems and engineering complex solutions, • You're a positive, proactive team member who excels when working collaboratively, • You have a strong knowledge of software engineering best practices, • You're degree educated, having achieved a 2.1 or above in a STEM discipline, • You experience working in a financial services or trading environment What's in it for you: As a Senior C++ Developer you will receive a competitive package: • Salary to £110k, • Pension (to 9% contribution), • Healthcare, • Volunteer / charity days, • Hybrid working, • Career development and training Apply now to find out more about this Senior C++ Developer / Software Engineer (Linux SQL C++17) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

Front End Engineer / Developer (TypeScript React Native AI) London / WFH to £80k Want to work on intellectually and technically challenging AI systems at the cutting edge of what is possible, whilst learning and collaborating with an amazing team and enjoying flexible working and a range of other perks? You could be progressing your career as a Front End Developer at a well-established AI company acting as tech incubator within the World Economic Forum to tackle issues like climate change, AI, battery technology and other real world problems. What's in it for you: • Salary to £80k, • Bonus, • Pension, • Healthcare, • Work with the latest cutting-edge AI technologies, • Excellent training and career development opportunities Your role: As a Front End Engineer you'll design and develop new features and enhancements on the core product that uses Artificial Intelligence to harness knowledge for strategic advantage. You'll work alongside a talented team contributing ideas, collaborating with designers and prototyping new features. There's a modern tech stack, you'll be mainly using JavaScript / TypeScript and React but will be able to pick new technologies and skills up on the job. Location / WFH: You'll be joining a friendly and supportive team in London with flexibility to work from home one day a week. About you: • You are degree educated in Computer Science, from a top tier university (e.g. Russel Group, Oxbridge), • You have Typescript experience combined with strong React and React Native skills, • You're proficient with HTML5 and CSS3, • You have experience of responsive design for desktop and mobile, • You're keen to work in a start-up environment, • You have excellent communication and collaboration skills, • You are a passionate technologist, keep up to date with the latest innovations and learn new things, • You have solid knowledge of software engineering principles, Agile practices, CI/CD and ideally have experience within a cloud environment (AWS preferred), • You are a bright, proactive individual and a strong problem solver with commercial acumen Apply now to find out more about this Front End Engineer / Developer (TypeScript React Native AI) role. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

About Locai Labs Locai Labs is The British Foundational AI Company, based in Paddington, London. We are dedicated to building world-class large language models at the forefront of cost, efficiency, and capability. Our mission is to advance cutting-edge AI from within the UK by combining deep technical innovation with engineering excellence, creating scalable models and intelligent systems that power next-generation applications for consumers and enterprises alike. Our work spans across: • Foundational AI model development, • Bespoke agentic applications for enterprise and consumer domains, • APIs and developer tools that enable intelligent automation The Role We are seeking a Software Engineer (Backend, AI Systems) to design and build the backend systems, APIs, and tools that power Locai Labs’ AI models and agentic platforms. You will work on a diverse range of challenges, from model-serving APIs and data pipelines to infrastructure for intelligent agents and automation frameworks. This is a hands-on engineering role for someone who enjoys solving complex technical problems and shipping impactful products. You will collaborate closely with the CTO and engineering team to design, build, and scale production systems that integrate AI into real-world applications. Responsibilities • Design and develop backend systems and APIs for AI-driven products and agent frameworks, • Integrate LLMs into scalable, production-ready systems, • Build internal tools and services to manage agents, workflows, and orchestration logic, • Collaborate with frontend, infrastructure, and research teams to deliver cohesive product experiences, • Contribute to system architecture, technical design, and engineering best practices, • Write clean, maintainable, and well-tested code Required Experience • 2–5 years of professional software engineering experience, ideally working on backend systems, APIs, or AI-related products, • Proficiency in Python and JavaScript/TypeScript (Node.js), • Strong understanding of backend architectures, REST/GraphQL APIs, and data modelling, • Experience with containerisation (Docker) and cloud platforms (GCP, AWS, or similar), • Familiarity with LLM or AI APIs, • Exposure to agentic frameworks (LangChain, LlamaIndex, Semantic Kernel, etc.), • Practical experience with databases (SQL / NoSQL), • Strong foundation in software design principles and systems thinking, • Comfortable working in a fast-paced, early-stage start-up environment with ownership and autonomy Nice to Have • Experience with vector databases or embedding pipelines, • Understanding of event-driven or real-time systems (Kafka, Pub/Sub, etc.), • Knowledge of API authentication, access control, or multi-tenant architectures, • Familiarity with React or other front-end frameworks (for internal tools), • Interest in applied AI research, model fine-tuning, or reasoning agents Environment and Culture You will join a small, highly technical team where your contributions directly shape the company’s technology and products. We value ownership, curiosity, and pragmatism; every engineer at Locai Labs helps define architecture, infrastructure, and product direction. You will work on-site at our Paddington HQ, collaborating closely with the CTO and engineering team in a transparent, fast-moving, and innovation-focused environment. Application Process • Application Review – We evaluate your background and experience., • Take-Home Technical Assessment – A short exercise to demonstrate your engineering approach., • Technical Interview – Discussion of technical depth, design thinking, and problem-solving., • On-Site Session at HQ – Collaboration exercises and technical discussions with the team., • Offer – Formal offer and next steps. If this sounds like you, we would love to hear from you. Apply directly via the form below: (Strictly no agencies or recruiters. We are only accepting direct applications.)

Backend Developer / Software Engineer (TypeScript Node.js) London / WFH to £100k Are you a senior technologist looking for an opportunity to progress your career in a hands-on role where you can make an impact? You could be joining a scaling tech company that has developed a digital distribution platform transforming electronic trading in the institutional FX options market via a central marketplace where institutions can place, discover and match option interests electronically - improving liquidity and efficiency for all participants as the platform scales. As a Backend Developer you will collaborate with a small team of technologists and successful entrepreneurs to design and implement intelligent solutions to business needs, with a focus on TypeScript and Node backend systems but also with exposure to and occasional frontend work. You'll help to ensure best practices are maintained and participate in code reviews to maintain sound engineering practices and share knowledge with the team. Location / WFH: There's a remote first policy, with the caveat that you'll meet up with the team in London once every two months, so you can work from home most of the time. About you: • You have experience of building enterprise grade systems that are reliable, secure, maintainable and observable, • You have strong TypeScript and Node.js backend development skills - Python is also desirable for data related work, • You have experience of building event-driven systems and public APIs, • You have a strong appreciation of SaaS, Kubernetes, Infrastructure as Code, GitOps, CI/CD practices and Cloud infrastructure (they use GCP but AWS experience is also fine), • You have some experience with front end work using React (or similar), • You're comfortable in a fast paced, sometimes ambiguous start-up environment with changing priorities, • You have used AI tools and are comfortable and interested in how to use them to improve efficiency, • You're collaborative and pragmatic with great communication skills What's in it for you: • Salary to £100k, • Stock options, • Impactful role with excellent career growth, • Remote working Apply now to find out more about this Backend Developer / Software Engineer (TypeScript Node.js) opportunity.

If you like building Python systems that make machine learning research actually work at scale - this one's for you. You'll develop and improve the internal tooling that researchers rely on daily: distributed compute workflows, data pipelines, and robust infrastructure that connects research code to real environments - including hardware/prototype devices on-site. What's in it for you • £98,000 - £110,000 annual salary, • 12-month contract - inside IR35 - PAYE, • Fully on-site in Cambridgeshire - hardware-heavy environment, • Proper engineering role: ownership, impact, and technical depth What you'll do • Build and maintain scalable Python tooling that supports ML research workflows, • Improve reliability: fix bugs, optimise performance, and ship iterative enhancements in sprints, • Integrate with distributed compute, data storage, and internal development systems, • Work closely with researchers as your "users" - gather requirements, translate ambiguity into working software, • Write clean, maintainable code and debug problems that span systems Must-haves • 4+ years of commercial experience building software in Python, • Hands-on with PyTorch or TensorFlow in production or applied ML environments, • Experience with distributed or high-performance computing, • Comfortable working with large/complex ML datasets and research-style workflows, • Good communicator: you can explain what you're building and why, not just ship code Nice to have • Audio / DSP-adjacent ML exposure, • ML tooling/pipelines built for researchers or data scientists, • Linux/Windows scripting, • CI/CD and deployment experience in complex environments How does your day looks You'll spend time building new features into internal tools, responding to researcher requests, fixing what's broken, improving what's slow, and collaborating with the infra team in a sprint cadence. This is hands-on engineering with real ownership. How to apply? If you're a Python engineer/developer who enjoys solving real systems problems for ML teams, share your CV, and we'll talk through fit, on-site expectations, and the interview process.

At Champion Data, our dedicated team are united by sport and driven by data. We strive to revolutionise and transform sport data globally by leveraging our cutting-edge technology and expert team, ensuring we deliver the best possible outcomes for our partners and clients. About the job Champion Data has an exciting opportunity for a capable and motivated Developer (Mid-Level) to join our engineering team. This role is ideal for someone who has moved beyond graduate or junior level and is looking to deepen their technical capability while contributing meaningfully to production systems used in elite sport. As a mid-level developer, you will design, build, test, and maintain software solutions under the guidance of senior engineers and technical leads. You’ll take ownership of well-defined components, contribute to team discussions and technical decisions, and steadily grow towards greater autonomy and responsibility. This is a full-time permanent role based in the United Kingdom. We operate a hybrid model, with developers typically spending 1–2 days per week in our central London office or client locations to support collaboration and team connection. The role reports into the Technology Leadership team (via the CTO) and works closely with senior developers, product managers, and delivery leads. The role may include participation in a rostered on-call support rotation for scheduled sporting events, with appropriate support and escalation. Key Responsibilities • Software Development: Design, develop, test, and maintain software applications using agreed technologies and patterns, following established best practices and coding standards., • Task Delivery: Deliver assigned tasks and user stories within agreed timeframes and quality expectations, raising risks or blockers early., • Collaboration: Work closely with other developers, testers, product managers, and delivery leads to build effective and reliable solutions., • Code Quality: Write clean, maintainable, and well-tested code, contributing to peer code reviews and continuous improvement of team standards., • Learning and Growth: Actively develop your technical skills and domain knowledge, learning from senior engineers and applying feedback to improve your work., • Reuse and Consistency: Leverage shared libraries, frameworks, and existing patterns where appropriate to ensure consistency and efficiency across systems., • Problem Solving: Investigate and resolve technical issues within your area of responsibility, escalating more complex problems when needed., • Operational Support: Assist with supporting and maintaining production systems, including diagnosing issues and contributing to fixes under guidance., • Documentation: Contribute to technical documentation to support maintainability, onboarding, and knowledge sharing. About You • Solid commercial experience with .NET / .NET Core and C#, • Practical experience building and maintaining applications in AWS environments, • Experience working on production systems with real users and operational constraints, • Familiarity with CI/CD pipelines and Git-based workflows, • Experience working within Agile delivery teams, • A willingness to learn and grow into greater technical responsibility, • Clear written and verbal communication skills, • Strong problem-solving ability and attention to detail, • Experience with data-intensive or distributed systems is advantageous but not required. Tell me more about Champion Data For over 20 years, Champion data has been at the forefront of delivering sports stats globally.With a global presence in Australia, the USA, the UK, and Asia, we specialise in real-time data collection, storage, analysis, distribution, and visualisation. We track every play and movement, delivering unbeatable game intel through seamless integration systems. Our unrivalled visual packages, in partnership with leading media outlets, ensure a sensational sports broadcast experience. We work across numerous major sports, including AFL, NRL, Football, Horse Racing, World Netball, LIV Golf, Tennis, and Lacrosse. As we continue to expand globally, we aim to solidify our position as the leading sports data company. At Champion Data, our people are at the core of our success, driving the innovation and passion that underpin our company culture. By joining our team, you will be part of a motivated group with a ‘can-do’ attitude, eager to embrace challenges and committed to personal and professional growth. At Champion Data we will enable you to be your own champion. Our Core Values: To challenge the Playbook / To be an Elite Partner / To Champion Team Why Join Champion Data? We offer flexible hybrid working arrangements, financial support for setting up a remote workspace and a strong focus on health and wellbeing. Our team culture is vibrant and supportive, including regular social events, team lunches, and more. We also provide extensive employee benefits, including access to our wellness program and additional leave through Mindful Me Days. What benefits does Champion Data offer the team in the UK? • Mindful Me Days: Four days per year dedicated to your wellbeing, • Flexible Working: Our team works globally in a hybrid environment, which includes two weeks per year, during which you can work remotely from anywhere worldwide., • UK Office: Access to a co-working space in Soho, London., • Our spaces: all of our offices have great end-of-journey facilities; including showers, wellness/prayer room & games, • Employee Assistance Programs: 24/7 Access to financial support and counselling, • Wellness Incentive: To help support your home office setup or contribute towards a wellness activity/service of your choosing, • Get to the Game: Funds towards tickets for you and your family/friends to attend sporting events globally., • Advance You Learning and Development: Annual budget to spend on learning and development activities plus Brain Block Time, this is time set aside monthly to learn or study., • Social Events: Including an annual Family Day & Volunteer Day, • Paid Parental Leave When you join Champion Data, you will have the opportunity to step into a fast-growing, dynamic business during an exciting period of expansion. Each day brings new challenges and opportunities to collaborate with diverse clients across the sports, technology, and broadcast media industries. We look forward to hearing from you and welcoming you to Champion Data. #thestorybehindthegame

🚀 Senior Python Engineer Location: London / Hybrid / Remote (UK & NL time zones) Type: Full-time Salary: Up to 85k + benefits Are you a Python engineer who loves tackling complex problems with math and analytics? 🧠💻 We’re searching for a Senior Python Engineer to help build cutting-edge software used by top global brands for forecasting, optimization, and analytics. This isn’t a data science role, it’s all about engineering powerful, scalable Python solutions that bring mathematical models to life. 🛠 What you’ll do: • Build, maintain, and improve Python modules for analytics and optimization., • Implement advanced algorithms for forecasting, econometrics, and marketing mix modeling., • Handle large-scale data and optimization challenges while keeping performance and scalability in mind., • Apply software engineering best practices—SOLID principles, design patterns, unit & integration testing., • Work with modern tech: NumPy, SciPy, Pandas, SQL, Docker, Kubernetes, cloud platforms, CI/CD., • Collaborate with an international team across the UK, Netherlands, and US., • Take ownership of key product modules and influence software architecture. 🏆 What we’re looking for: • 5+ years Python experience, especially with scientific libraries (NumPy, SciPy, Pandas)., • Relevant degree (Maths, Computer Science, or related quantitative field)., • Strong maths/statistics/analytics background, with experience translating theory into production-ready Python code., • Experience building analytics/optimization solutions in a product environment., • Bonus: familiarity with marketing mix modeling, forecasting, or econometrics., • Bonus: experience with SQL, Docker, Kubernetes, cloud platforms, CI/CD pipelines., • Excellent communicator and team player, able to problem-solve and share knowledge. Why this role is exciting: 🎯 Shape the analytics engine behind tools used by leading global brands. 🌱 Opportunities to mentor others and own critical modules. 🚀 Work in a fast-paced, performance-driven environment with room for growth. 📚 Training, workshops, and conferences to keep your skills cutting-edge. Why you’ll love this team: Join a highly skilled, international engineering team where your work directly impacts product success. Flexible working options make it easy to balance life and work, while challenging problems will keep you engaged every day.

6 months contract/Hyrbid/2 days in office London/750 per day Inside Ir 35 Senior Java Developer (VP) Role Overview We are seeking a Senior Java Developer with deep Electronic Trading expertise to join our E-Fixed Income (eFI) Development Team in London. The team builds and operates low-latency, high-performance electronic trading systems that sit at the heart of the bank’s Fixed Income business. This role will play a key part in expanding and optimising our TransFICC connectivity, enabling faster time-to-market, improved pricing distribution, and enhanced trading workflows across Fixed Income products. You will work closely with traders, quants, financial engineers, and technology partners, contributing directly to the performance, resilience, and evolution of a mission-critical e-trading platform. What You’ll Be Doing • Design, build, and enhance a robust, ultra-low latency Fixed Income electronic trading platform, • Lead the adoption and optimisation of TransFICC connectivity within the eFI ecosystem, • Identify and eliminate performance bottlenecks through profiling, tuning, and architectural improvements, • Develop lock-free, allocation-free, performance-critical Java components, • Deliver high-quality software using Test-Driven Development and Domain-Driven Design, • Partner with Traders, Financial Engineers, and Business Analysts to translate trading requirements into scalable technical solutions, • Own the full software lifecycle: design, development, testing, release, and production support, • Provide 3rd-line support for production systems and continuously improve platform stability and service levels, • Collaborate with external electronic market technology providers and internal connectivity teams, • Influence the future direction of the platform by proposing and delivering strategic enhancements Essential Skills & Experience • Extensive experience in Electronic Trading systems, ideally within Fixed Income or FX, • Strong expertise in low-latency Java development and concurrent/multi-threaded systems, • Proven experience with RFQ workflows integrated into broader trading platforms (pricing, algo trading, STP), • Deep knowledge of Core Java, object-oriented design, and low-latency design patterns, • Hands-on experience with:, • Performance profiling and monitoring, • Building fault-tolerant, high-throughput systems, • Linux-based environments, • Network protocols: TCP, UDP, Ethernet, HTTP, • Experience with Infrastructure as Code (AWS, Ansible), • Strong understanding of e-trading workflows, controls, and operational risk, • Ability to communicate complex technical concepts clearly to senior traders and non-technical stakeholders, • Self-starter mindset with strong ownership and delivery focus, • 8+ years working on trading systems, with at least 5 years in electronic trading Desirable • Hands-on experience with TransFICC, • Agile delivery experience (Scrum, CI/CD, automated testing, BDD/TDD), • Exposure to large-scale, distributed trading architectures Why Join Us? • Work on business-critical, high-performance trading systems, • High visibility role with direct exposure to Front Office stakeholders, • Opportunity to shape the future of the Fixed Income electronic trading platform, • Technically challenging environment with real-world performance constraints, • Collaborative culture that values engineering excellence and innovation If you want, I can also: • Shorten this for LinkedIn posting, • Create a headhunter pitch (30-second sell), • Build Boolean strings for TransFICC / e-Trading Java talent, • Calibrate whether this is true VP vs strong AVP/Senior Engineer #java developer @trading #FX #Fixed income

Captur helps software understand real world scenes in real-time with an SDK for flexible, on-demand visual recognition. We’re a small, rapidly scaling team backed by top-tier investors; we recently closed a $6M seed round to accelerate product and go-to-market growth. We are global leaders in edge ML and have validated +150M images on-device for enterprise customers such as Lime. Next, expanding as a horizontal platform across use cases that require real-time speed, high volume and coverage across a wide range of mobile devices. Role Snapshot You’ll be the technical authority customers speak to when integrating our SDK. Your day will include live debug sessions, ticket triage, onboarding calls, running demos on technical sales calls and sharpening our release and onboarding playbooks. You’ll help the business move faster by reducing engineering context-switching and by making sure problems are reproduced, scoped and prioritised correctly. This is a hands-on, customer-facing, technical role — ideal for someone with mobile/SDK experience who likes to unblock teams and customers. You’ll report to the Head of Mobile and work closely with our Account Executives and Customer Success Managers based in New York. Key Responsibilities Customer onboarding & enablement • Run and own technical onboarding for new customers: integration documentation, sample apps and hands-on sessions with client engineers, • Triage SDK-related issues raised by clients: reproduce where possible, identify root causes and create clear, prioritised tickets for Engineering (with logs, repro steps and impact), • Own release communications for customers: versioning notes, migration guidance, and rollout coordination, • Use Datadog to monitor SDK health, investigate spikes, de-duplicate low-signal crash reports and escalate real issues with clear repro and impact, • Create one-page troubleshooting guides for the most common integration and crash issues, • Create and maintain onboarding docs, troubleshooting guides and sample apps, • Act as the technical point of contact for CS and Sales; feed product/engineering with customer requests, usability issues and feature ideas, • Proactively suggest improvements to the SDK, onboarding flow and monitoring to reduce churn and integration time, • Run periodic “integration health” reviews with customers and internal stakeholders What Success Looks Like (First 3 Months) 30 Days: Learn and connect • Get familiar with internal processes, crash reporting and monitoring (Datadog), • Meet key customers and document current onboarding pain points, • Be the technical point of contact for existing clients; respond to incoming tickets with clear repro steps and prioritisation, • Deliver a formalised bug reporting and triage process (template + SLAs), • Scope and agree release technologies and process ahead of the SDK revamp, • Proactively drive iterative improvements in onboarding and release management (playbooks, sample apps, troubleshooting guides) Core Requirements • Strong customer-facing skills - you have experience with enterprise pre-sales / technical sales support (joining sales calls, scoping proof of concepts, managing integrations) and can run technical calls with client engineers and commercial teams, • Experience with CI/release tools, package managers (CocoaPods, Swift Package Manager, Maven, npm) and clean versioning/migrations, • Experience using crash/monitoring tools (Datadog, Sentry, Crashlytics or similar), • Practical knowledge of networking/auth/API interactions common in mobile SDK integrations, • Experience with native mobile development (Kotlin or Swift), • Comfortable debugging mobile issues and reading logs — able to reproduce simple issues locally or via sample apps, • Solid ticketing discipline: able to write clear bug reports with repro steps, impact, logs and prioritisation, • Based in the UK (London preferred) and able to work from our London office at least 1 day per week on an ongoing basis Bonus Points • Built or maintained SDKs used by external developers, • Familiarity with common Computer Vision pipelines and ML Ops basics for mobile development, • Exposure to Datadog dashboards and metrics instrumentation best-practices, • Able to work from our London office 3 days per week during the first 3 months to speed up pairing and knowledge transfer

Title: Developer (Braze) Type: Contract (12 months) Salary: £400-£500 Hybrid: London This role focuses on leading the technical delivery of modern, data-driven marketing campaigns using Braze. You’ll own complex customer journey implementations and play a key role in shaping how marketing technology is designed, integrated, and executed at scale. You will operate as a hands-on technical lead within an active delivery team, working closely with marketing, data, and engineering stakeholders. The emphasis is on high-quality execution, technical leadership, and measurable campaign impact. Key Responsibilities • Lead technical delivery of multi-channel Braze campaigns, • Design and build customer journeys using Braze Canvas, • Implement personalisation using Liquid, events, and attributes, • Provide technical leadership, QA oversight, and optimisation Required Experience • 5+ years’ experience in marketing technology or software delivery, • 2+ years hands-on Braze implementation experience, • Strong knowledge of Braze Canvas, campaigns, APIs, and SDKs, • UK work eligibility required. NO SPONSORSHIP AVAILABLE Title: Developer (Braze) Type: Contract (6 Months) Salary: Competitive Hybrid: London

🚀 Java Back-End Developer (Azure / AWS) – Contract | London (Hybrid) Contract: 12+ months IR35: Outside IR35 Location: London (Hybrid – 3 days onsite) We are supporting a consultancy delivering enterprise-scale technology programmes for a major client. They are seeking an experienced Java Back-End Developer with strong cloud (Azure/AWS) expertise to join a long-term engagement working on modern, microservices-based systems. This role suits a senior engineer who enjoys hands-on development, cloud-native architectures, and working within agile, high-performing teams. 💡 Key Responsibilities • Collaborate closely with fellow developers and technical stakeholders, • Design and implement microservices using the Spring Boot framework, • Work across the full Software Development Life Cycle (SDLC), • Integrate microservices with databases and external systems, • Work with streaming technologies such as Kafka, • Build and maintain CI/CD pipelines in Azure and/or AWS, • Identify, troubleshoot, and resolve software defects, • Write and maintain automated test cases to ensure design and quality standards are met, • Produce clear and well-structured technical documentation for microservices ✅ Essential Skills & Experience • Strong development experience with Java (SDK 8 or later), • Proven experience building microservices using Spring Boot, • Hands-on experience with Azure or AWS, including service integration and development, • Experience working with relational databases (Oracle or similar), • Understanding of Agile methodologies and the full SDLC, • Strong analytical and problem-solving skills, • Proactive, delivery-focused mindset with a positive attitude ⭐ Desirable (Nice to Have) • Front-end development experience with React, • Familiarity with financial markets, instruments, or trade lifecycle, • Ability to write and optimise SQL, • Experience with event-driven or streaming architectures 🎓 Qualifications & Background • Bachelor’s degree in Computer Science or a related discipline, • 10+ years of overall IT industry experience, • Proven experience working in Agile delivery environments, • Strong track record of collaborating effectively within high-performing teams 🤝 Why Consider This Role? • Long-term Outside IR35 contract, • Opportunity to work on complex, enterprise-scale systems, • Hybrid working model based in London, • Consultancy-led environment with strong engineering standards 📩 Interested? Apply with your CV or contact us for a confidential discussion.

We are looking for an experienced Developer with strong computer vision experience to design, build, and maintain a high-performance Software Development Kit (SDK) used in security-critical mobile applications. This role sits at the intersection of mobile engineering, applied computer vision, and SDK architecture, and will play a key role in delivering reusable, secure, and developer-friendly components used by third-party teams and partners. Key Responsibilities SDK Design & Development • Design and develop a cross-platform mobile SDK (iOS & Android) using Swift and Kotlin, • Create clean, modular, well-documented SDK APIs for external developers, • Ensure the SDK is easy to integrate, versioned correctly, and backward compatible, • Own the full SDK lifecycle: design, development, testing, packaging, and release Computer Vision & Biometrics • Implement and optimise computer vision pipelines on mobile devices, • Work with camera frameworks, image processing, and real-time analysis, • Integrate vision-based features such as:, • Face detection / liveness detection, • Image validation and anti-spoofing, • Multi-signal identity verification (where applicable), • Optimise performance for low latency, low power usage, and on-device processing Security, Quality & Performance • Apply secure coding practices suitable for identity, authentication, or trust-based systems, • Write comprehensive unit, integration, and performance tests, • Profile and optimise memory usage, CPU/GPU usage, and battery impact, • Support internal and external developers during SDK integration Collaboration & Documentation • Collaborate with product, security, and backend teams, • Produce clear SDK documentation, sample apps, and integration guides, • Contribute to technical design discussions and architectural decisions Required Skills & Experience Core Technical Skills • Proven experience building and maintaining SDKs or developer platforms, • Hands-on experience with computer vision on mobile, • Deep understanding of mobile performance constraints Computer Vision Experience • Experience with mobile CV frameworks such as:, • Apple Vision / CoreML, • OpenCV (mobile), • Custom ML or image processing pipelines, • Experience working with real-time camera input, • Understanding of lighting conditions, motion, spoofing, and edge cases, • Experience in using Tensaflow Software Engineering • Strong knowledge of software architecture and API design, • Experience with CI/CD for mobile libraries, • Versioning, semantic releases, and dependency management, • Comfortable working in high-assurance or security-focused environments Nice to Have • Experience with biometrics, identity verification, or liveness detection, • Experience writing SDKs consumed by external customers or partners, • Familiarity with cryptography, secure enclaves, or trusted execution, • Experience with cross-platform SDK strategies, • Background in regulated industries (finance, legal, insurance, defence, healthcare) What Success Looks Like • A robust, secure, and performant SDK that external developers enjoy using, • Vision features that work reliably across devices and environments, • Clear documentation that reduces integration friction, • SDK releases that are predictable, stable, and well-supported Ideal Seniority • Senior or Lead level, • Comfortable owning complex technical problems end-to-end, • Able to balance performance, usability, and security trade-offs

Are you a recent Computer Science graduate looking to kickstart you career in tech? Interested in FinTech? Graduate Software Developer in Test (SDET) - FX Solutions 📍 Location: London 3 days a week 💰 Compensation: Up to £60k + bonus + benefits We're once again partnering with our long-term FinTech partner as they're looking for a recent Graduate to join their engineering team as a Software Developer in Test (SDET). This is an excellent opportunity to step into the financial space, joining one of the most successful FinTech scale-ups in the UK and gain face-to-face experience with hedge funds, asset managers and leading banks all around the world. As a Graduate SDET, you must have: • BSc in Computer Science, • Degree from Russell Group University, • Strong comprehension of Core Java concepts and Computer Science fundamentals, • Hard-working & driven mindset In this position, you will gain extensive knowledge across a broad variety of technological topics: • ✅ Automation testing knowledge of REST APIs, • ✅ Software development experience in Java, • ✅ Identifying opportunities and executing improvements to quality process, • ✅ Developing automated tests and test frameworks, • ✅ Improving Continuous Integration pipeline, • ✅ Exposure to Docker, Kubernetes, SQL, Linus, Cloud deployments You will be joining a highly collaborative and smart engineering team, learning from some of the brightest minds in London. You will also enjoy a fantastic benefits package, including: generous bonus, private healthcare, pension, life assurance, enhanced & increasing holiday allowance, personal development budget, long service awards & more! If you graduated this year and are looking to use your Computer Science degree in an impactful, fast-paced environment with brilliant opportunities to progress your career, apply now for this exciting Graduate SDET opportunity! 🚀 Please note: Due to compliancy reasons, we will only be able to consider applications based in the UK.

This is an exciting opportunity to work in a collaborative and innovative environment, contributing to the design, development, and deployment of high-quality software solutions.

C++ Software Engineer / Developer (C++ Mac Extensions API) WFH / London to £80k.Are you a C++ Software Engineer with experience of developing and integrating Apple Mac Extensions and APIs?.You could be progressing your career at a rapidly expanding scale-up software house that is developing a highl