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INSIDE IR35 ROLE, HYBRID TRAVEL TO BRISTOL & LONDON, SC CLEARANCE NEEDED** Develop and maintain web applications: Design, code, test, and deploy scalable and efficient web applications using modern technologies. Collaborate with cross-functional teams: Work closely with designers, product managers,

2* Senior Backend / Full Stack Ruby Developer – Profitable SaaS Scale-Up | Up to £85k + Excellent Benefits | Hybrid (London) I am working with a long term client of Opus, who is a profitable, investment-backed SaaS company with serious growth plans! We’re hiring Backend-focused Ruby Developers or Full Stack Ruby Developers with modern JavaScript experience (React, Vue, etc.) to join their tech team in London. This is a rare opportunity to be part of a company that’s not only profitable but also growing– They have a strong internal progression pathways into tech lead roles as they build out their squads. Why Join? • Profitable & Investment-Backed – Stability meets ambition., • Career Growth – Clear paths to leadership as the team expands., • Tech-Driven Culture – Collaborative squads, modern stack, and autonomy. What they can offer: • Up to £85,000 base salary., • Perks – Life assurance, private healthcare, and more., • Hybrid Working – 1–3 days/week in their London office (flexible based on team needs). What You’ll Bring: • Strong experience with Ruby (Rails or other frameworks)., • Exposure to modern JavaScript (React, Vue, or similar)., • Passion for clean code, scalable systems, and collaborative development., • Mentoring junior and mid-level developers

Full Stack Developer - London - Energy Trading - 140k RJC is working a Full Stack Developer role for a global energy trading company based in London. Working as part of the Global Analytics team within the Front Office, they are looking for someone to collaborate directly with the business and develop analytics applications utilised by commodity trading desks. The role demands expertise in energy market data, developing infrastructural components, and implementing full stack technology for commodities analytics. The ideal Full Stack Developer will have: • Minimum 5+ years of experience working with C# and related .NET technologies, • Strong proficiency with front end development (preferably React), async patterns, and DOM manipulation, • Ability to interact with stakeholders to progress design and satisfy requests, • Experience operating and supporting bespoke trading platforms, • Experience working in an agile scrum development model Apply with an up to date CV below to set up an initial call.

Senior Software Engineer Opportunity - Tech for Good - Up to100k Base + Equity We're looking for a Full Stack Senior Software Engineer to join a mission-driven deep tech spin out from Imperial - think autonomous vehicle-level complexity, but applied to a completely new domain. You will be solving deep technical challenges with real-world impact. The ideal candidate should have some iOS experience—either as an iOS developer or through exposure while working as a software engineer. Role Highlights: 💰 Up to £100k base plus very generous equity 🌍 London / Hybrid 🚀 Backed by serious funding, with 100x growth targets already in motion 🧠 Work alongside top scientists, designers, and engineers in a flat, fast-moving team Looking for: -Software Engineering experience with strong fundamentals and a drive to learn. -STEM degree -Someone who thrives in high-intensity, high-impact environments. -Willingness to learn new technologies -Previous iOS/Swift experience Apply here ot email your CV to

About the company • 8+ years of experience in modern programming languages, preferably Java and TypeScript, working with a variety of technologies, including ReactJS, MongoDB, PostgreSQL., • Experience using Kubernetes, Docker, and Jenkins, for containerisation and CI/CD is a plus., • Knowledge of scalable distributed systems with a deep understanding of object-oriented design and design patterns., • Knowledge of designing APIs and microservices., • Experience working on web technologies., • An exciting opportunity to join an international organisation working with a major financial services organisation. Furthermore, a competitive day rate for this role will be offered in addition to your own dedicated Hays Consultant to guide you through every step of the application process. Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Hi Professionals Hope you are doing great Our client is looking for multiple Forward Deployed Engineer/Full Stack Developer experienced consultants to join a high-growth organization. If you are interested kindly, please share your CV and let me know your rate expectation. Role: Forward Deployed Engineer/Full Stack Developer Location: London, UK Duration: Contract Exp: 10+ years hands-on A Forward Deployed Engineer (FDE) is a hybrid role that combines software engineering, client engagement, and problem-solving to deliver tailored solutions directly to customers, particularly in high-stakes environments like AI. Key Responsibilities of a Forward Deployed Engineer • Client Engagement: FDEs work closely with clients to understand their unique challenges and require…, • Solution Development: They design, build, and deploy customized solutions that leverage advanced te…, • Collaboration: FDEs collaborate with various teams, including engineering, product management, and …, • Troubleshooting and Optimization: They are responsible for troubleshooting issues in deployed solute… Skills Required • Technical Expertise: FDEs must possess strong software development skills, familiarity with data end…, • Communication Skills: Effective communication is crucial, as FDEs need to translate complex technic…, • Problem-Solving Ability: They should be adept at navigating ambiguity and quickly adapting to chang…, • Business Acumen: Understanding business processes and being able to bridge the gap between technical… Conclusion In summary, Forward Deployed Engineers play a vital role in bridging the gap between advanced technology and real-world applications. Their unique blend of technical skills, client engagement, and problem-solving capabilities makes them essential in driving the successful implementation of AI solutions across various industries. As demand for these professionals continues to grow, they are becoming increasingly integral to the success of technology-driven organizations. Thanks & Regards Milan | Talent Acquisition | Europe & UK Ampstek Services Limited Kemp House, 152-160, City Road London-EC1V 2NX Tel - 01339 891247 E-mail-

Senior Full Stack Developer - Hybrid - £650/day Outside IR35 | React | .NET | Python | AWS | API | Asset Management | Wealth Management Looking to speak with experienced Full Stack Developers to join a client of ours within the Asset space. They're looking to build a new division within the tech team and are looking for a Senior/Lead Full Stack Developer. Details • 3 days onsite in London, • Up to £650/day Outside IR35, • Initial 6-month contract Key Skills • Strong experience in full-stack development, with React, and .NET or Python, • Hands-on experience with AWS, • Strong API development and integration experience, • Experience with event-driven architecture Senior Full Stack Developer - Hybrid - £650/day Outside IR35 | React | .NET | Python | AWS | API | Asset Management | Wealth Management

Full Stack Python / JavaScript Developer - London - £60k 1 day per week in office My prestigious financial services client is looking to expand their digital transformation team and require an experienced Full Stack Developer with strong Python & JavaScript to join them working across a range of new initiatives Core skills across Python and JavaScript with experience in Django and/or React are an absolute must for this position Duties: • Work within a small team of developers, contributing to daily code reviews and merge requests., • Develop across the entire product stack, • Take ownership of projects, from requirement gathering through to deployment, • Mentor junior developers to support their technical growth. Skills & Experience: • Minimum of 3 years of experience as a full-stack developer across: Backend: Python, Django Frontend: JavaScript, React, Next.js Version Control: Git Beneficial Knowledge: • Azure, • AI Full Stack Python / JavaScript Developer - London - £60k 1 day per week in office

Role: Full Stack Developer Location: London (Hybrid) Position Type: Contract About the Role: We’re seeking a dynamic and skilled Full Stack Developer who thrives in fast-paced environments and is passionate about building scalable, high-performance web applications. You’ll be working across the stack—from crafting intuitive front-end interfaces to architecting robust back-end services—using Node.js, Angular, and Next.js. If you love solving complex problems, collaborating with cross-functional teams, and staying ahead of the tech curve, we want to hear from you! Responsibilities: • Develop and maintain scalable web applications using Node.js, Angular, and Next.js, • Design and implement RESTful APIs and server-side logic, • Optimize applications for speed, scalability, and responsiveness, • Collaborate with UI/UX designers, product managers, and other developers, • Write clean, maintainable, and well-documented code, • Participate in code reviews and mentor junior developers, • Integrate third-party APIs and services, • Ensure cross-browser compatibility and mobile responsiveness, • Stay up-to-date with emerging technologies and best practices Requirements: Technical Skills • Strong proficiency in JavaScript/TypeScript, • Expertise in Node.js for back-end development, • Solid experience with Angular (preferably Angular 15+), • Hands-on experience with Next.js and React ecosystem, • Familiarity with MongoDB, PostgreSQL, or other databases, • Knowledge of RESTful APIs, GraphQL, and WebSockets, • Experience with Git, CI/CD pipelines, and cloud platforms (GCP) Nice to Have: • Experience with Docker and container orchestration (e.g., Kubernetes), • Familiarity with testing frameworks (Jest, Mocha, Cypress), • Knowledge of performance optimization and security best practices, • Contributions to open-source projects or a strong GitHub portfolio Regards Anita

Senior API Engineer - PHP - £90k + Bonus - Full Remote. We’re searching for a talented senior API developer with a background in building scalable web services around the PHP stack to join our team and dive into building a one-of-a-kind platform that manages finances for super yachts and touring bands—pretty cool, huh? This isn’t your average gig; you’ll be working on a complex system that caters to some truly unique industries. Expect to get your hands dirty with a variety of tasks: designing and implementing robust APIs, optimizing database queries to keep things running fast and smooth, and developing features that make life easier for our clients—like automated invoicing systems or real-time expense tracking. You’ll also troubleshoot tricky bugs and collaborate with the team to ensure the platform stays reliable and scalable as we grow. If you enjoy solving real-world problems with clean, efficient code, this could be right up your alley. The best part? This role is fully remote, meaning you can work from literally anywhere in the UK. You’ve got the freedom to set up your workspace wherever suits you best. If you want to there is an office in Manchester where 50% of the business works from but you have the flexibility to make it work your way, as long as you’re based in the UK. On top of that, we’re putting together a compensation package that’s worth your while. You’ll get good benefits to keep you covered, a bonus to reward your hard work, and shares in the company—yep, a little slice of the action to make you feel invested in what we’re building. Our leadership team isn’t new to this game either; they’ve built and sold very successful software companies and worked for names like Amazon and Microsoft, so you’ll be working with people who know how to turn ideas into successes. If you’re ready to tackle some interesting challenges, write code that matters, and join a team that’s doing something a bit out of the ordinary—all from wherever you call home in the UK—then we’d love to hear from you. Venchr is an equal-opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, color, family or medical care leave, gender identity or expression, genetic information, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran status, race, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws, regulations and ordinances.

I'm currently working with a fantastic client in London who is looking to hire a Full Stack Developer on a permanent basis. They're seeking someone with over 4 years of development experience who thrives in a collaborative, office-based environment. Their core software product helps leading industrial organizations enhance asset performance by applying data science and machine learning to minimize waste and boost reliability. Full Stack Developer Opportunity • Location: London (Office-based, collaborative team), • Salary: £55,000 - £65,000, • Industry: Data Analytics / Software, • Start: ASAP As a Full Stack Developer, you will: • Design and implement services using Java and Python., • Collaborate on infrastructure setup and maintenance., • Focus on testing, coding, and refactoring to ensure high-quality solutions., • Work closely with cross-functional teams (developers, DevOps, data scientists, product managers) in an agile methodology. Their Tech Stack includes: • Backend: Spring & Spring Boot, Java, Python, FastAPI, • Frontend: Vue.js, • Cloud: AWS, • Databases: Elasticsearch & Postgres, • And more... This role offers exciting opportunities to dive into various areas, including Natural Language Processing, Random Forest and Monte Carlo Simulations, Classification, Big Data ETL Pipelines, High Volume Event Processing, Predictive Analysis, CI/CD Cloud Ops, Mentoring, UX Design, Data Visualization, and Build Management Systems. This is a brilliant opportunity to join a company at the forefront of data analytics and make a significant impact.

Senior Frontend Developer (Lead-Level) Location: London (Hybrid, 4–6 days in office per month) Type: Full-time | Global Fintech | 80% Hands-On / 20% Technical Leadership About the Role We’re looking for a Senior Frontend Developer with proven lead experience to help shape and scale our next-generation fintech platform. You’ll work across a modern JavaScript and TypeScript stack, using React and Tailwind to build high-performing, visually refined interfaces for a global client base. This role blends hands-on development (80%) with technical leadership (20%), guiding best practices, mentoring developers, and influencing design and architecture decisions. We’re seeking someone with deep technical skill and a mature, business-oriented mindset, who can balance innovation, usability, and delivery in a fast-paced fintech environment. Key Responsibilities • Frontend Development: Lead the build of complex, data-rich UI components and workflows using React, TypeScript, and Tailwind CSS., • Architecture & Design: Shape frontend architecture, enforce design system consistency, and ensure maintainable, scalable codebases., • Leadership: Mentor developers through code reviews, pair programming, and best-practice guidance., • Collaboration: Partner with product managers, UX designers, and backend engineers to deliver seamless, performant user experiences., • Optimization: Drive frontend performance improvements, focusing on load times, responsiveness, and accessibility., • Innovation: Evaluate and introduce modern frontend tools, libraries, and frameworks to improve developer productivity and platform quality., • UI/UX Influence: Contribute to visual and interaction design decisions, balancing aesthetic excellence with practical implementation., • Delivery: Take ownership of features from concept to release, ensuring quality and reliability in a regulated fintech environment. What We’re Looking For Technical Expertise • 6+ years of professional frontend development experience., • Deep proficiency in JavaScript, TypeScript, React, and Tailwind CSS., • Strong UI experience - ability to translate complex workflows and data visualizations into intuitive, elegant, and responsive interfaces., • Deep understanding of component-driven design, state management, and performance optimization., • Experience integrating RESTful and event-driven APIs and handling real-time data., • Skilled in testing frameworks (Jest, Cypress, Playwright, etc.) and modern build tooling., • Familiarity with design systems, style guides, and UI documentation practices., • Prior experience mentoring or leading small frontend teams., • Mature communicator, able to influence technical direction and articulate trade-offs clearly., • Business-minded - understands how design and engineering decisions impact growth and client outcomes., • Collaborative and approachable, fosters a culture of excellence without ego., • Design-aware, an appreciation for usability, typography, and consistent visual design. Why Join • Work in a global fintech with impact across markets and products., • Blend technical depth with creative ownership - influence both the code and the user experience., • Flexible hybrid setup, mostly remote, with 4–6 London office days per month., • Join a talented, fast-moving engineering team solving complex problems at scale.

Position: Lead Azure Developer - Acturis API / Insurance products MS Stack - Developing frontend applications Salary: 80k-90k GBP Industry: Financial Services - Insurance Remote: 1 day in the office per month Location: Bristol or London If you're Senior Software Engineer who enjoys working with Acturis API and you're looking to join a small team of engineers, for a leading insurer, then please apply! It's an Azure environment, so you'll need to have a background working in this, as well as being well-versed in C#. They want someone who's hands-on, so ideally you'll have experience building public facing Blazor WASM sites, to create scalable, high-performing, user friendly solutions that are secure and reliable. Must have..... • Blazor frontend web framework, • C#, HTML, CSS, • UI/UX design, • Google Analytics integration, • TDD; APIs;, • Azure environment, • Agile methodology Nice to have...... Experience working in the insurance industry If the above sounds like you and you're open to a remote role with occasional (once a month) visits to the office for meet-ups, then send me your cv on here or email it to I can send you the full position description, once we've had a chance to discuss the company and role over a call. Thank you for reading our advert. #blazor #csharp #azure #agile #insurance #softwareengineer #acturis

Job description Java Full-Stack Developer Location: London (Hybrid) Salary: £85,000 – £90,000 + benefits I’ve partnered with an exciting tech firm who are building software that transforms how stakeholders make important decisions. What started as a consultancy has evolved into a SaaS platform that helps organisations cut through hundreds of pages of board packs and focus on what matters. Their products combine Java, AI, and modern web technologies to deliver clarity and speed for decision-makers. They’re estimated at nearly $30M, annually, and have 3 offices globally, with the view to grow their UK footprint. Having recently doubled down on AI-driven tools, they are tackling the biggest pain points stakeholders have, information overload and poor decision-making efficiency. What You’ll Do • Develop and enhance their core services built in Java (Spring Boot)., • Work on full-stack features using React (or similar modern JS frameworks)., • Collaborate on new product initiatives, including AI-powered tools., • Contribute to architecture decisions and help shape the future Tech Stack • Backend: Java (Spring Boot), Ruby on Rails (legacy), Golang, Python (AI services), • Frontend: React, TypeScript, • Other: Kubernetes, modern CI/CD pipelines What We’re Looking For • Strong experience with Java and Spring Boot., • Full-stack skills with React or similar frameworks is desired, • Bonus points for Kubernetes, cloud-native development, or exposure to AI-driven products., • Someone curious, collaborative, and excited to work on modern, evolving products! The successful Java developer can be paid upto £85k, private medical cover, life insurance, 25 days leave plus bank holidays, training budget and mental health / wellbeing benefits available too. Interested in learning more? Or know people who might be interested? Please get in touch via Rebeka.mulk @ opusrs.com or add me on Linkedin – Rebeka Mulk @ Opus recruitment solutions to have an informal chat. Please note, this is a hybrid role in London (can also offer flexibility for the right individual). No Sponsorship on offer.

Full-Stack Developer Hybrid London (3 days per week) Up to £55,000 + Benefits Are you a motivated developer who enjoys working across the full stack, learning new technologies, and building solutions that make a real impact? We’re working with Olus, a fast-growing digital consultancy helping law firms and corporate legal teams embrace technology and transform how they work — and they’re looking for a Full-Stack Developer to join their expanding team in central London. This is an exciting opportunity to work on varied, high-impact projects in a collaborative environment where your ideas and growth truly matter. 💡 Why this role? • Be part of a growing, innovative consultancy combining business change, data, and software expertise., • Work on a variety of projects — from building web apps to exploring low-code and automation platforms., • Hybrid working: 3 days per week in a premium central London office near Covent Garden, Soho, and Southbank; 2 days remote., • Join a small, close-knit team where your work has real visibility and purpose. 👩 💻 What you’ll be doing: • Supporting the development of applications and digital tools across the full stack., • Collaborating with consultants and stakeholders to translate business needs into technical solutions., • Helping to build scalable, secure applications using traditional frameworks and low-code tools (e.g. Microsoft Power Platform, Outsystems)., • Writing, testing, and maintaining code while following agile best practices., • Contributing to proofs of concept and prototypes, exploring new technologies and ways of working., • Learning continuously and taking on more responsibility as you grow within the team. 🎯 What we’re looking for: • 1+ years’ experience as a software developer (Ideally with exposure to both frontend and backend development.), • Strong experience in at least one of: Python, JavaScript, Java or C#., • Computer Science BSc., • Strong educational background, attending a Russell Group University., • Basic knowledge of relational databases (e.g. Postgres, MySQL, SQL Server)., • Familiarity with building or consuming RESTful APIs., • Understanding of software testing principles, performance, and security best practices., • Strong communication and problem-solving skills, and a willingness to learn., • A degree in Computer Science, Engineering, or a related field. ✨ Nice-to-haves: • Exposure to data engineering concepts such as ETL processes or integration pipelines., • Experience with low-code development (Power Platform, Outsystems, Mendix)., • Interest in automation, data visualization, or digital transformation projects. 💰 Package & Benefits: • Salary up to £55,000, depending on experience., • Hybrid working – 3 days per week in the London office, 2 from home., • Private medical insurance.

Microsoft Dynamics 365 CE Developer – Permanent Salary: £70,000 to £95,000 per annum - Benefits - Healthcare options – Hybrid – Bonus! Location: UK-Wide Offices (London, Bristol, Birmingham, Manchester, Blackpool, Newcastle)| Hybrid working / 2-3days Remote Working We are excited to be offering this opportunity for a talented Senior Dynamics 365 CE Solutions Developer to join my clients rapidly expanding cloud team. My client is looking for multiple Dynamics 365 CE Developers to join their teams in Manchester, Newcastle and Blackpool. This is a permanent position and represents a unique opportunity for someone to enhance their digital career. Essential skills • The role is delivery focused, working on a single client project at a time (with the opportunity to support sales and pre-sales activities if of interest)., • Oversee and shape user needs gathering to ensure technical fit, helping inform the wider architecture of the solution to meet client objectives and goals as well as user needs., • Own the high level and low-level solution design of end to end Microsoft Dynamics 365 projects., • Design solutions with focus on security, accessibility and performance to ensure safety and scalability., • Design the integration architecture and interfaces required using the full capabilities of the Microsoft technology stack., • Be a key person interacting with client stakeholders, building relationships and customer trust in the capabilities of Dynamics 365 and the Power Platform and demonstrate the art of the possible that inspires clients and colleagues to deliver the best technical solution possible. Your Profile We are looking for individuals who can bring the following to our team: • Energy and excitement about the technologies and capabilities provided by Dynamics 365 and the Power Platform. The out of the box capabilities and limitations. As well as a wider understanding of the Microsoft technology stack, including but not limited to Azure and SharePoint., • Knowledge of software engineering best practices as well as Microsoft Dynamics CRM SDK, C#, Visual Studio and Team Foundation Server., • Full implementation lifecycle experience of CRM based programmes within Microsoft Dynamics 365 and the Power Platform., • Experience with Continuous Integration (CI) and Continuous Delivery (CD), ideally using Azure DevOps., • A passion for delivering according to an agile methodology, planning projects and releases in sprints and writing Epics, Features and User Stories. To apply please click the “Apply” button and follow the instructions. For a further discussion, please contact Ellis Dowden on 83zero Limited is a boutique consultancy specialising in Software Development & Agile within the UK. We provide high quality interim and permanent IT professionals.

A global trading organisation is seeking a skilled C# Developer to join a high-impact team dealing with business critical projects. This an exciting opportunity to contribute to strategic solutions while being part of a broader modernisation programme into a cloud and data platform focused environment. As the business moves away from legacy systems and invests in modern architecture, you’ll work at the intersection of stability and transformation — ensuring continuity in existing applications while helping shape the future tech landscape. What You’ll Be Doing: • Develop and maintain full-stack solutions using C#, SQL, and front-end technologies like React., • Support mission-critical regulatory applications as part of a collaborative, Agile feature team., • Contribute to the strategic migration from legacy platforms to a cloud-based architecture using Python, Azure, and Databricks., • Apply best practices in DevOps, CI/CD, and test-driven development., • Participate in technical governance and architectural decision-making., • Collaborate with cross-functional teams to deliver high-quality, scalable software in a Kanban Agile environment. What We’re Looking For: • 3–6 years’ experience as a software engineer or similar., • Strong skills in C#, SQL, REST APIs, and single-page web applications., • Hands-on experience with Azure, Git, CI/CD, and DevOps tooling., • Exposure to or interest in Python and Databricks as part of a modern data ecosystem., • Familiarity with tools such as Jira, Docker, Kubernetes, Octopus, Artifactory, Oracle, and SQL Server., • A problem-solver with a strong understanding of software development practices., • Experience working in Financial Services is a plus, but not essential. Why Join? • Play a pivotal role in a cloud transformation journey using modern data and analytics platforms., • Gain experience with emerging technologies including Python, Azure, and Databricks., • Join a stable, globally recognised organisation with a strong culture of innovation., • Enjoy a flexible hybrid working model and inclusive, collaborative culture.

Join a leading options market maker with a global trading footprint! Position: Cloud Platform Engineer Industry: Financial services Work Type: Full-time, On-site Location: London, UK Salary: Up to £70,000 basic salary What You’ll Be Doing: • Build and scale a cloud foundation, including networking, IAM, security, and “everything as code” with Terraform/Terramate., • Implement and maintain self-healing architectures, focusing on Kubernetes., • Support critical engineering platforms: multi-tenant Airflow, BigQuery, and PostgreSQL clusters., • Enhance developer experience via remote dev environments, self-hosted CI/CD pipelines, and observability tools. What They're Looking For: • Hands-on experience with a major cloud provider (preferably GCP), Kubernetes, and Infrastructure as Code (Terraform)., • Strong Python skills for automation and operational problem-solving., • Customer-focused approach to building stable, well-documented platforms., • Pragmatic focus on efficiency, velocity, and leveraging AI tools for problem-solving., • 2–4 years in Cloud, Platform, or DevOps roles, with excellent communication skills., • Familiarity with CI/CD and data/observability platforms is a plus., • Minimum 2:1 STEM degree or equivalent professional experience. Tech Stack: • Cloud: GCP, • Orchestration: Kubernetes, • IaC: Terraform/Terramate, • Dev Environments: Remote development tools, • CI/CD: Self-hosted pipelines, Argo Workflows, • Data Platforms: Airflow, BigQuery, PostgreSQL, • Observability: Grafana, Prometheus, • Deployments: Helm For more information, contact Maria Ciprini at Harrington Starr, or click "Apply" to start your application.

Our client, an innovative AI startup bringing frontier technology to the adult social care sector, have developed cutting-edge products to enhance the quality and efficiency of care services. They are now seeking a talented entrepreneurial Engineer to join in scaling their technology and making a difference in the community. Experience: Background: ● Proven experience as a Full Stack Developer, Founding Software engineer or similar role. ● Bachelor's or Master's degree in Computer Science, Engineering, or a related field. ● Experience building your own start up or product is a huge plus! Backend & Infrastructure: ● Full proficiency in Python. ● Experience with Google Cloud Platform (GCP); or confidence in transferring experience from AWZ or Azure. ● Familiarity with microservices architecture and serverless computing. ● Understanding of DevOps principles and infrastructure as code (IaC). AI Expertise: ● Strong interest in Generative AI with the ability to understand and articulate key concepts. ● Experience working with LLMs, LangChain and other AI technologies. ● Familiarity with machine learning frameworks like TensorFlow or PyTorch is a bonus. — What They Offer: ● Impactful Work: Contribute to a mission-driven company revolutionising adult social care. ● Equity Opportunity: Competitive salary with equity options. ● Growth Potential: Grow into a leadership role as they expand. Apply today!

Job Title: Golang Developer Location: Address: 1-13 St Giles High St, London WC2H 8AG Mode of working: Hybrid (3 Days in the Office) Duration: 6+ Months contract initially Job description: As a Web Solutions Engineer (WSE) you are responsible for building, designing, and deploying scalable, modern, web applications. You deliver full pieces of functionality on moderately complex projects with minimal assistance. You architect high quality web applications, and design key tools and systems that support said web applications. Top Responsibilities: • Write and review code in JavaScript or TypeScript, Golang/C#, and/or SQL, Angular, • Test, debug, maintain and/or update full-stack web applications., • Write and review technical documents, including design, development, and revision documents., • Collaborate with Product, UX, QA, and engineering teams, to deliver new features Mandatory Skills/Qualifications: • 3+ years experience writing JavaScript or TypeScript, Golang, and/or SQL, • 3+ years experience developing resource oriented APIs, • 3+ years experience designing and debugging databases

A fantastic opportunity has arisen for a Head of Integrations to join a pioneering software company that is transforming how global enterprises leverage cutting-edge technologies. This innovative business, backed by top-tier investors and recognised among the world’s most promising AI companies, is expanding their technical team to support continued growth and success. They are looking for an experienced technical leader to take full ownership of integrations with third-party systems. This is a hands-on, client-facing role ideal for someone who can combine deep technical knowledge with excellent communication and leadership skills to optimise client implementations. Note this is an individual contributor role – leading clients opposed to team leadersership. Location: London office with hybrid working options (must be able to travel to London regularly) – must be UK-based Salary: Generous package + excellent benefits package Requirements for Head of Integrations • Significant commercial experience in SaaS companies, in a role relating to Software Integrations into customers, • A strong academic history (2.1/1st top Uni, A's at A Level etc) - the management team is made up of some of the brightest minds in AI (many with Ph.D.s from internationally leading Unis), so they need someone who can technically joust at this level, • Proven track record in software development, system integrations, and creating developer resources such as APIs, SDKs, and technical documentation., • Strong experience across Integrations, Full Stack Web Development, and Cloud Architecture., • Proficiency with one or more of the following technologies: JavaScript, NodeJS, Python (or equivalent modern frameworks/languages)., • Outstanding interpersonal and communication skills, with the ability to convey technical concepts clearly to a range of audiences., • Highly organised with excellent time management, attention to detail, and a proactive, problem-solving mindset., • Comfortable working in a fast-paced, innovative environment with shifting priorities and tight deadlines. Responsibilities for Head of Integrations The dream is to reach the pinnacle of Software Integrations, where customers can see this happen seamlessly with the touch of a button (we appreciate not an easy task!). To start making steps on this journey, the successful applicant will: • Take complete ownership of integration processes with external systems, ensuring seamless connectivity and high levels of client satisfaction., • Collaborate closely with Client Solutions and other internal teams to fully understand client requirements and deliver tailored technical solutions., • Design and implement scalable, future-proof architectures for new third-party connectors and integrations., • Enhance system observability by improving diagnostics, logging, and tracing to aid technical support teams in resolving issues swiftly., • Oversee the ongoing development and management of the public API, covering REST and event streaming functionality to support bespoke client integrations., • Produce comprehensive technical documentation for both internal stakeholders and external users, leveraging tools like Swagger for clarity and accessibility., • Drive the development of ‘self-serve’ capabilities to empower clients to independently manage their integrations wherever possible. What the role offers: • Join an award-winning, high-growth tech company at the forefront of AI innovation., • Work on exciting projects that directly impact the efficiency of global enterprise operations., • Collaborate with a passionate, talented team in an inclusive and supportive environment., • Enjoy excellent opportunities for personal and professional development within a growing organisation. Applications If you would like to apply for this exciting Head of Integrations opportunity, please send your CV via the relevant links! We’re committed to creating an inclusive and accessible recruitment process. If you require reasonable adjustments for your application or during the interview process, please let us know by separately emailing (if this email address has been removed by the job-board, full contact details are readily available on our website). Keywords – Head of Integrations / Technical Integration Lead / API Integration Manager / SaaS Integration Engineer / Full Stack Developer / Solutions Architect / Cloud Engineer / Platform Integrations Lead / NodeJS / JavaScript / Python / API / Cloud Architecture / Swagger / Computer Science / Software Engineering / Integration Architect / API Solutions Lead / Technical Project Manager / SaaS Platform Engineer / Systems Integration Specialist RedTech Recruitment Ltd focus on finding roles for Engineers and Scientists. Even if the above role isn’t of interest, please visit our website to see our other opportunities. We are an equal opportunity employer and value diversity at RedTech. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

Job Title / Corporate Title: C# .NET Full Stack Developer Contract: £750 - £950 / day (Inside IR35) Location: London (Hybrid) You’ll be joining a major financial services organisation to design, build, and support Full Stack C# .NET applications used across core regulatory and reporting systems. Your mission — develop, integrate, and enhance enterprise-grade software that underpins finance and regulatory reporting processes. You’ll work across the stack using C#, .NET, SQL Server, and Oracle, collaborating with DevOps and cloud teams to deliver high-performance, resilient solutions in a highly regulated environment. This is a hands-on development role for someone who knows how to turn business requirements into robust, scalable applications — and can code, design, and integrate at a high technical standard. What you’ll be doing: • Develop and maintain .NET applications (both Windows and web-based)., • Build and optimise SQL Server and Oracle database components (PL/SQL & T-SQL)., • Support integration and automation initiatives across financial systems., • Apply best practices in design, testing, and DevOps CI/CD pipelines., • Work closely with business and technical teams to ensure accurate, compliant delivery., • Proven C# and .NET development expertise (Framework & .NET Core)., • Strong understanding of object-oriented programming, design principles, and best practices., • Solid experience with SQL Server and Oracle databases., • Experience in financial or regulatory reporting systems within banking., • Familiarity with DevOps, CI/CD, and automation tools., • Cloud computing experience (Azure, AWS, or GCP)., • Knowledge of AQR Reporting (ECB)., • Exposure to Agile delivery environments.

Full-Stack PHP Developer – £80,000 – Hybrid Overview A global digital marketing and technology agency specialising in online gaming is seeking a Software Developer to join its high-performing development team. This role offers the opportunity to work on scalable, high-throughput systems that power real-time user experiences in the iGaming sector. You’ll play a key part in the next stage of their platform evolution, helping to build a premium look and feel for customer-facing sites. Role and Responsibilities • Work across the full stack, with an even split between frontend and backend development., • Contribute to the transition from a PHP-heavy stack towards TypeScript/React-based frontend applications., • Deliver scalable, performant, and reliable solutions for high-traffic platforms., • Collaborate with designers, product teams, and fellow engineers to raise the standard of customer-facing experiences., • Write clean, testable code and follow modern development best practices., • Contribute ideas for technical improvements and new greenfield builds. Essential Skills and Experience • Strong commercial experience with PHP (backend)., • Solid hands-on skills with TypeScript and React (frontend)., • Exposure to Node.js or NestJS desirable (but not essential if TypeScript is strong)., • Background in greenfield development projects, • Comfortable working in collaborative, agile teams., • DevOps/cloud experience (e.g., Docker, AWS) is a bonus. Package • c£80,000, • Discretionary bonus, • Hybrid (4x week in London), • Benefits: Private healthcare & dental, pension scheme, income protection, stock options, gym & yoga studio, wellness initiatives, retail discounts, 25–30 days holiday, and more.

Senior Java Developer – FX Algorithmic Trading | £825/day Inside IR35 | London | 3 Days Onsite Our client, a global leader in the financial services industry, is seeking a highly skilled Senior Java Developer to join their FX Automated Client Execution team. This is a 6-month contract based in London, requiring 3 days per week onsite. You’ll work directly on the trading floor alongside quants and traders, developing and maintaining algorithmic trading strategies for FX and listed derivatives, deployed across platforms including Cortex iX. Key Requirements: • Strong server-side Java development experience, • Solid understanding of Java architecture and design patterns, • Excellent debugging and unit testing skills, • Experience in front-office environments, • Knowledge of multi-threading, performance tuning, and memory management, • Exposure to FX, listed derivatives, smart order routing, and FIX order flow Rate: Up to £825/day, inside IR35 Contract: Initial 6 months Location: London, 3 days/week onsite

Full Stack Node.js/React Developer - FinTech Innovation Team 📍 London (Victoria) - Hybrid | UK Remote considered 🏦 Join a regulated FinTech transforming global payments 🚀 Shape the Future of Financial Services Join our new strategic team at a cutting-edge FinTech backed by Banking Circle's international payment rails. We're transforming how businesses access account-to-account payments, card issuing, and financial services across UK, EU, and US markets. You'll rebuild critical client-facing applications from the ground up, pioneering our move to Node.js/React and API-first architecture. 🏦 About Us • Regulated EMI in UK & EU, with US sponsor bank partnerships, • Visa & Mastercard member - card issuer, • Global reach with homogeneous services across three major markets, • Dual client base serving both direct clients and strategic partners, • 40-person product & tech team driving innovation in financial services 🎯 What You'll Build Client Portal & Onboarding Transformation • Redesign complex financial workflows into intuitive, user-friendly interfaces, • Build secure, compliant applications handling sensitive financial data, • Pioneer Node.js adoption within our established Ruby/MySQL/AWS infrastructure, • Architect robust middleware solutions connecting frontend experiences to financial services, • Implement secure OIDC/OAuth flows for multi-tenant financial applications Strategic Impact • Lead migration from legacy technologies to modern React/Node.js ecosystem, • Establish development patterns for our expanding Node.js capabilities, • Showcase innovations to stakeholders in bi-monthly London sessions 🧠 The Developer We're Seeking Financial Services Mindset • Curious nature with deep interest in how financial technology works, • Customer UX first approach - understanding that in FinTech, user experience directly impacts business success, • Security-conscious thinking appropriate for regulated financial service, • Experience in financial services highly desirable Technical Excellence • 3-5 years full stack development experience, • Strong Node.js skills for middleware development (new to our stack - you'll help shape our approach), • React.js expertise with modern development practices, • Frontend design skills - ability to create professional, trustworthy financial interfaces, • OIDC/OAuth knowledge essential for secure financial applications 🛠️ Our Tech Ecosystem Current Stack • Ruby backend with MySQL database, • AWS infrastructure with containerised deployments, • GitHub for version control and collaboration Your Focus Node.js/React frontend transformation (new strategic direction) • Integration with existing Ruby services, • Modern frameworks: Next.js, Vue.js experience valuable How We Develop • Product-led approach with 2-week agile sprints, • CI/CD pipelines for rapid, reliable deployment, • Collaborative planning and regular innovation showcases 🏢 Working Arrangements 🇬🇧 London-based (Preferred): 3 days Victoria office + 2 days WFH 🇬🇧 UK Remote: Welcome with twice-monthly London visits for planning & showcases Compensation varies based on experience and location 🎁 Why Join Our FinTech Journey? • Founding member of our Node.js/React transformation, • Regulated industry experience with global compliance exposure, • Cutting-edge financial services - payments, card issuing, multi-currency operations, • International scope across UK, EU, and US markets, • Product-focused culture with rapid iteration and innovation, • Strong backing from Banking Circle's established infrastructure 🌟 Ready to Revolutionise FinTech? If you're a creative developer passionate about financial technology, user experience, and building secure, compliant applications that power global commerce, we want to hear from you. Apply with your CV and tell us what excites you about building the next generation of financial services technology. We're committed to diversity and inclusion in FinTech. All backgrounds welcome. #FinTech #NodeJS #React #London #Payments #CardIssuing #RegulatedTech #UKRemote #BankingTech Please note: We do not accept unsolicited CVs or applications from recruitment agencies for this role.

I'm working with a fantastic software company that's looking for a Principal Software Engineer to join their team. They've developed a powerful product that utilises data analytics and machine learning to optimise inventory data, built primarily on Java. This is a key role where you'll take ownership of the technical roadmap and manage solutions architecture, acting as a vital link between leadership and the engineering team. Job Title: Principal Software Engineer Location: Central London (Office Based) Salary: £80,000 - £95,000 Industry: Software/Data Analytics Requirements: • Over 7 years of experience as a Full Stack Developer., • Proven track record in leading product development and architecting solutions., • Demonstrated expertise in scaling and managing production systems., • Provides comprehensive technical development support, both broad and detailed., • Highly proficient in: Python, Java, Spring, JavaScript, Vue, Elasticsearch, PostgreSQL, cloud computing (AWS, Azure), Terraform, ML, GitHub Actions, Jenkins, and Linux. Responsibilities: • Own the technical roadmap, aligning it with the product strategy to achieve key business objectives., • Architect and manage robust solutions and APIs., • Deliver critical software engineering, with a focus on rapid prototyping., • Inspire and mentor a highly motivated, polyglot on-site development team., • Lead R&D initiatives and technical debt reduction, actively supporting team members., • Facilitate and lead sprint retrospective routines, fostering continuous improvement., • Drive the investigation and adoption of new technologies, tools, and processes to enhance product and solution delivery. If you are an highly experienced Full Stack Java Developer and have brilliant experience with Architecture and Roadmaps then Apply!

Senior Java Developer – London / Hybrid – Up to £90,000 + Benefits We’re partnered with an innovative fintech scale-up that’s redefining the credit and lending space. Backed by leading VC investors and operating successfully for the past decade, the business is now entering a new growth phase and looking for a Senior Java Developer to join their talented engineering team. This is a hybrid role based in central London, typically requiring 3 days per week in the office (with flexible hours). You’ll have the opportunity to work on a modern product roadmap, building next-generation platforms and payment systems that are shaping the future of digital lending. Tech Stack • Java 11+, • Spring Boot, • AWS, • Microservices architecture, • Docker / Kubernetes, • Kafka (or similar messaging tools) Key Responsibilities • Design and develop high-performance, low-latency software components., • Contribute across the full software development lifecycle., • Write and maintain clean, testable, scalable code., • Manage and enhance CI/CD and development process tooling., • Collaborate in agile ceremonies and foster a culture of teamwork., • Mentor junior engineers and promote engineering best practice., • Work closely with cross-functional teams (Product, QA, DevOps, Data)., • Champion continuous improvement and innovation. Projects You’ll Work On • Migration from monolithic to microservices architecture., • Upgrading core systems to newer Java versions., • Enhancing UI frameworks (e.g., Vaadin)., • Building a new lender platform and modern payment systems. Who You Are • A hands-on, pragmatic engineer who thrives in collaborative, fast-moving teams., • A self-starter who enjoys autonomy and contributing ideas that drive real change., • Experienced in modern Java development with a solid understanding of scalability and performance., • Comfortable working in a startup or scale-up culture with light process and strong ownership. If this sounds like you, please apply now!

C# / React Risk Developer City of London – Global Investment Bank Hybrid Set up. Department – Risk Management, Derivative and Analytics – Must have experience. C#, JavaScript, React, Python, TypeScript, Risk, Analytics – VaR, Greeks, Front Office, CI/CD, SQL, AWS, Derivatives Permanent Hire - £100,000 - £150,000 basic plus bonus and benefits Harrington Starr is working with an International Investment Bank based in City of London who are looking to hire a Senior.Net/C# Developer to join the a Risk Management team for their Derivatives Trading space. This is a Front Office Development team and you will be working alongside a Quants and Traders for Multi Asset Derivative Products. As the Senior C#.NET (WCF/.WPF) Developer you will join a small and very productive .NET Development team that work on a range of Risk Reporting and Data Capture software for the Bank. You will be working on the company’s bespoke Risk & Performance application for positioning and Fixed Income & OCT Derivatives trading application. As the senior .NET C# developer you will have experience with the Microsoft Stack including JavaScript, TypeScript and React. Any experience with Python Development would also be beneficial. Key Technical Skills: • Proven track record in C#.NET development, • Experience with React and JavaScript / Typescript, • Experience with T-SQL and SQL Server, • Experience with Risk Management for Pre and Post Trading Risk Services., • Solid knowledge of Risk Protocols such as VaR, Greeks etc., • Business knowledge of Derivatives Products and Trade Lifecycle. .

Role: Senior .Net Developer Comp: £65,000-£75,000 Location: Central London (On-site). About the Role: As a Senior .NET Developer, you’ll play a key role in designing, developing, and maintaining software applications. You’ll collaborate closely with cross-functional teams to translate user needs into technical solutions that are robust and user-friendly. Key Responsibilities: • Translate user requirements into effective technical solutions, • Develop and maintain high-quality APIs and backend services, • Collaborate with stakeholders to ensure seamless integration between systems, • Contribute to documentation, testing, and bug fixing as part of the development lifecycle, • Support junior developers and promote knowledge sharing across the team Tech Stack & Requirements: • Strong experience in C#, .NET Core, and Entity Framework, • Solid understanding of RESTful APIs and backend service architecture, • Skilled with SQL and relational database design, • Experience with writing standalone distributed services, • Experience working with IIS, • Exposure to working with on-premises/self managed environments (desirable) You must be UK based & have full right to work in the UK. If this role sparks an interest and you're keen to learn more, Please apply or email me on

Full Stack | Angular | C# | .NET | Energy Trading | £750/Day OUTSIDE IR35 | 6-month rolling | Hybrid | LDN Our client is looking for a C# .NET Engineer for a 6-month rolling project, working at a leading Energy Trading house. This client deals in both physical and non-physical Energy products as well as trading Commodities. They have recently seen a requirement to add head count to their operations and trading team to enhance the Energy trading capability within the company. This has resulted in the need for this Full Stack Angular C# .NET developer to join them as they enhance their energy trading desk within the company. This developer will be needed to come into the team as an established Energy Trading specialist developer as well as leading and upskilling peers around them. Having previous trading experience in the Energy Trading space is going to be essential for this role. This Full Stack Angular C# .NET engineering role is: 💸This role is paying up to £750/day Inside IR35 💻This hybrid role is 3 days in office 📍The office is in Central London Technology Stack / Experience: • C#, • Angular, • .NET 4+ / .NET Core, • Azure, • SQL Server T-SQL, • Microservices / Event Driven Architecture, • Previous ENERGY Trading experience As a member of the Energy trading team, you'll be responsible for designing, developing, and delivering production software as well as contributing to the wider technical architecture. This role requires a good communicator, someone who has experience facing off to the business in Energy Trading companies and someone who can face off to traders and operations directly. If you are interested in finding out more about the Full Stack Angular C# .NET role. Please send your latest CV to C# | .NET | Energy Trading | £750/Day OUTSIDE IR35 | 6-month rolling | Hybrid | LDN

We are working with a global Energy trading company based in London dedicated to accelerating the transition to greener energy. They are seeking a Full Stack Developer experienced in Python and React to join their CRM & Business Origination applications team. You will be sitting in the Front Office alongside the Traders in a fast-paced and dynamic environment. Responsibilities: • Maintain and clean the Python database, • Deliver technical requirements from business solutions, • 3+ years commercial experience in Python, • Strong commercial experience with React, • Ideally some experience with SQL, • Up to 140K, • Fantastic trading bonus structure, • Great relocation package, • 5 days a week in office, dropping to 4 after onboarding

Senior Full Stack Developer Introduction Wipro is seeking a Senior Full Stack Developer to join our high-performing engineering team. As the Senior Full Stack Developer, you will focus on both frontend (Angular/React) and backend development with .NET Core, driving scalable and efficient digital solutions. You'll work closely with a dynamic, Agile team that thrives on continuous improvement and innovation. About Wipro Wipro is a global leader in technology services and consulting. Recognized as a "Top Employer" by the Top Employer Institute 2024, we are committed to inclusive workplace practices, business excellence, and continuous growth. Join a culture that celebrates innovation and empowers your career. Your Benefits As the Senior Developer, you’ll receive a competitive salary, training and development opportunities, a generous benefits package, up to 6% employer contributory pension, and access to quarterly bonuses. Your Responsibilities As a Senior Full Stack Developer, you will: · Develop and maintain modern full stack applications using .NET Core and Angular/React · Contribute to Agile ceremonies and collaborate on sprint planning, coding, testing, and reviews · Implement Infrastructure as Code (IaC) and CI/CD pipelines with Azure DevOps · Apply design patterns, best practices, and the Well-Architected Framework to improve performance · Act as an individual contributor, delivering hands-on development and analysis Mandatory Skills You’ll bring expertise in: · Full stack development (.NET Core backend, Angular/React frontend) · Azure DevOps CI/CD pipelines and YAML configuration · Unit testing frameworks for .NET applications · Agile methodology and cloud design patterns · Azure services (minimum of 3) such as App Services, Azure Functions, Cosmos DB, or Event Grid Desirable Skills Ideally, you’re also experienced in: · Azure Bicep and Infrastructure as Code · Cost optimization in Azure environments · Microservices architecture and containerization · Well-Architected Framework and design best practices Equal Opportunities Wipro is an advocate for positive change and conscious inclusion. As a global employer, we strive to create a diverse Wipro family by remaining committed to the development of our culture, diversity, equality, and inclusion in the workplace. All applicants welcome.

Python Developer - Python, Django, REST API's, AWS, JavaScript OB are partnered with a Global Financial Services company, who are looking to add a highly skilled Python Developer to their team. In this role, you'll be working their Python backend systems, developing new features and collaborating with different teams, to ensure product goals are met. Python Developer - Python, Django, REST API's, AWS, JavaScript Key Skills and Experience: Strong knowledge of Python Experience with Python frameworks (Django preferred) PostgreSQL REST API'S Docker Cloud experience (AWS preferred) Knowledge of Frontend Technologies (JavaScript, HTML, CSS) This is a hybrid role with 2-3 days a week required in a London based office Base salary of £75k-£90k depending on skills and experience To be considered, you must be UK based Python Developer - Python, Django, REST API's, AWS, JavaScript

Job Title: Full Stack Developer Client: Leading FinTech Firm Compensation: Up to £180k + Bonus Location: London (Hybrid) Perks: Modern tech stack, flat team structure, collaborative culture, beautiful workspace We're working with a top-tier FinTech client who is looking for outstanding Full Stack Developers to join their high-performing team. You'll be building complex, enterprise-level applications that are essential to supporting trading operations across the world! In this position, you'll be responsible for developing real-time web applications from front to back. It’s a great chance to work with a skilled team of technologists in a fast-paced and technically engaging environment! What You'll Be Doing: • Building responsive and interactive user interfaces that offer a smooth and intuitive user experience, • Developing scalable and reliable back-end systems for advanced, data-driven applications, • Working closely with product managers, UX/UI designers, and other team members to turn business requirements into functional features, • Writing clean, maintainable, and efficient code that supports long-term scalability What We're Looking For: • A degree in Computer Science or a related field, • Solid experience working as a Full Stack Developer, • Strong proficiency in React and Python, • Experience in the finance sector is a plus, • Excellent written and verbal communication skills, • A proactive approach to learning and a willingness to adopt new technologies Interested? Apply now or get in touch directly at for more details.

We’re looking for a Full Stack Engineer who thrives in a fast-paced environment and enjoys solving complex problems across the stack. You’ll play a key role in designing, building, and maintaining high-quality software that directly impacts our users. Tech Stack You’ll Work With: • Back End: Python (FastAPI / Django / Flask — depending on your stack), • Front End: React + TypeScript, • Other Tools: PostgreSQL, Docker, GitHub, CI/CD pipelines (GitHub Actions, etc.) What You'll Do • Build and maintain scalable APIs and backend services in Python, • Develop dynamic, responsive web interfaces using React and TypeScript, • Collaborate with product and design teams to ship new features, • Contribute to architectural decisions and code reviews, • Help improve performance, scalability, and developer experience, • Write tests and documentation to ensure software quality About You • 4+ years of experience in full stack development, • Strong proficiency in Python (and experience with modern frameworks), • Solid experience with React and TypeScript in production applications, • Familiar with REST APIs, web security best practices, and SQL databases, • Passionate about clean code, performance, and great UX, • Comfortable working in an agile, fast-moving team environment, • Strong communicator who thrives in a collaborative culture

Our client, a pioneering tech company transforming financial and location-based data into meaningful, user-friendly insights. They are looking for someone who has experience providing Full Stack Development engineering duties; especially in support of website as well as customer facing software consoles As a Full Stack Developer, you will work alongside our experienced engineers, contributing to real-world projects that drive meaningful impact. This role is ideal for individuals eager to apply their knowledge in a fast-paced, innovative environment. Key Responsibilities: • Troubleshooting and debugging: Identify and fix bugs in the software to ensure it runs smoothly and efficiently., • Collaboration: Work with other developers, designers, and stakeholders to develop project plans and deliver new features., • Code quality and performance: Write clean, efficient, and reusable code, and optimize applications for speed and security, • Develop and maintain applications: Build, test, and maintain fully functional web applications from start to finish., • Front-end development: Design user-friendly interfaces, build interactive features, and ensure the application is responsive across different devices and screen sizes., • Back-end development: Create and manage servers, databases, and APIs to ensure the application's logic and functionality are sound. Essential Experience: • Front-end: Proficiency in languages like HTML, CSS, and JavaScript, often including modern frameworks like React or Vue.js., • Back-end: Experience with server-side languages and frameworks like Node.js, Python, Java, or PHP., • Databases: Knowledge of both SQL and NoSQL databases., • APIs: Experience with API design and development., • Cloud platforms: Experience with cloud-based solutions is often required Benefits & Working Environment: • Permanent, full-time employment contract from day one., • Hybrid working model (minimum 3 days per week onsite)., • Hands-on experience in a real-world development environment., • Competitive compensation package commensurate with experience This is an excellent opportunity for a technically adept Full-stack Developer to join a forward-thinking organisation within financial services. If you are interested please get in touch and apply.

Senior PHP Full-Stack Developer - £100k - Hybrid Overview We are partnering with a global digital marketing and technology agency specialising in online gaming to hire a Senior PHP Full-Stack Developer. In this senior role, you’ll take technical ownership of solutions end-to-end, mentor junior developers, and ensure delivery of highly scalable, high-availability platforms that drive cutting-edge online gaming experiences. You’ll also play a senior position in driving the move from a PHP-heavy stack to a modern TypeScript/React front end, helping define and deliver greenfield solutions with a premium, customer-first focus. Role and Responsibilities • Drive full-stack development projects, ensuring high-quality delivery across both frontend and backend., • Act as a technical lead for React/TypeScript adoption, mentoring the team (currently PHP-heavy) and raising overall capability., • Architect and implement scalable, performant solutions that power high-traffic, real-time platforms., • Take ownership of key greenfield projects, shaping the technical direction for premium UI/UX., • Collaborate with cross-functional teams to align technical solutions with business goals., • Support DevOps and CI/CD initiatives where possible. Essential Skills and Experience • Proven experience with PHP (backend) and TypeScript/React (frontend)., • Track record of leading or mentoring in engineering teams., • Experience building greenfield projects, • Familiarity with Node.js/NestJS is desirable but not essential., • Strong understanding of design patterns, scalability, and system performance., • DevOps experience (Docker, AWS, CI/CD pipelines) would be highly valued., • Strong database expertise (MySQL and diverse storage paradigms)., • Nice to have: Prior experience in the iGaming industry or similar complex transactional platforms. Package • c£100,000, • Discretionary Bonus, • Hybrid (4x week in London), • Benefits: Private healthcare & dental, pension scheme, income protection, stock options, gym & yoga studio, wellness initiatives, retail discounts, 25–30 days holiday, and more.

Job Title - Full Stack Developer Experience - 5+ years Job Type -Contract Work mode - Hybrid Location - London, UK We require local/ no sponsorships candidates only. Job Description - Key Responsibilities: • Develop and enhance the eSign environment using React, Node JS, Express JS, Mongo DB (Mern Stack)., • Implement a robust, reusable framework to support new applications., • Collaborate with design teams to enable dynamic configuration—allowing designers to modify UI settings and see real-time updates (e.g., stylesheet changes)., • Drive the evolution of a component-driven architecture and modern frontend development tooling., • Strong experience with React.js, Node JS, Express JS, Mongo DB (Mern Stack)., • Experience in building frameworks or design systems., • Familiarity with UI/UX collaboration and live configuration tools., • Understanding of component libraries, state management, and responsive design principles., • Knowledge of modern frontend build tools (Webpack, Vite, or similar).

We’re looking for a Mid-level Full-Stack Laravel Developer to join our clients technology team building cutting-edge video streaming platforms used by some of the biggest names in media, sport, and entertainment. This is an opportunity to work on complex, high-traffic projects that reach millions of viewers worldwide - developing features across both backend and frontend systems using the latest version of Laravel and the TALL stack (Tailwind, Alpine.js, Laravel, and Livewire). What You’ll Be Doing • Develop, maintain, and enhance APIs and web-based CMS features for a scalable video streaming platform., • Collaborate with cross-functional teams to deliver clean, test-driven, maintainable, and modular code., • Troubleshoot, debug, and optimise applications for performance, security, and scalability., • Refactor code to improve maintainability and reduce complexity., • Participate in peer code reviews and Agile sprints., • Work hands-on with AWS tools and services as part of daily development. What We’re Looking For • Proven commercial experience with Laravel., • Solid experience using Tailwind CSS to implement modern, responsive UI designs., • Experience with Alpine.js, Livewire, and vanilla JavaScript., • Strong understanding of MySQL, Eloquent models, and RESTful APIs., • Experience integrating third-party APIs and webhooks., • Familiarity with Git and collaborative code management., • Strong understanding of object-oriented programming principles., • Ability to thrive in a fast-paced environment and continuously learn new technologies. Nice to Have • Experience with Alpine.js, Livewire, and vanilla JavaScript., • Knowledge of Laravel Queues, Jobs, Horizon, AWS SQS, and modern PHP tools such as Larastan, Rector, or Laravel Shift., • Familiarity with Docker, CI/CD (GitHub Actions), and AWS infrastructure., • Experience in video streaming or the media sector

Lead Engineer – NodeJS Developer Salary: Up to £100000 + Benefits + Bonus NodeJS, JavaScript, TypeScript, React Framework, AWS, Kubernetes, Docker, Digital Investments. SQL, Harrington Starr has partnered with an innovative Digital Currency Investment Platform Company that specialise in developing unique software systems for clients for invest into Digital Markets from Pensions, Investments and Fund Management. This is an exciting opportunity to join a small team within a large organisation and get the experience to utilise the JavaScript ecosystem. This organisation are developing cutting edge web-systems, which are being used globally and are offering the opportunity for you to play a pivotal role within the full software development life cycle. We are looking for an experienced Full Stack Engineer with NodeJS, JavaScript, TypeScript and NodeJS and including cloud technologies. You will have a degree in computer science from a reputable University and have a good understanding of JavaScript TypeScript and React Framework. Key requirements within this opportunity are as follows: • Experience with NodeJS, • Solid experience with JavaScript and TypeScript, • Experience with Azure Cloud, • Experience with Kubernetes and Docker., • Any experience with Digital Investments.

Software Developer – Hybrid (Hammersmith, London) We are supporting a high-performing trading company in Hammersmith that is looking for a Software Developer with strong Python experience. The role sits within a fast-moving engineering team that focuses on delivering real value quickly, solving practical technical problems, and giving developers end-to-end ownership of the systems they build. What You’ll Work On • Building integrations with new external data sources using advanced web scraping and reverse-engineering techniques., • Developing and maintaining low-latency, real-time data feeds to support internal systems and strategies., • Improving internal visibility and observability tooling to help diagnose integration issues and identify improvements., • Contributing across the full lifecycle of your work — design, development, testing, review, deployment, and ongoing support., • Working within an agile, flexible roadmap that adapts as new opportunities and information arise. Key Responsibilities • Build High-Quality Features: Develop features that directly support business goals, writing maintainable and performant code., • Uphold Code Quality: Review and test work from teammates to ensure reliability and consistency., • Production Ownership: Support the stability of services in production as part of a shared rotation., • Collaborate Across Teams: Partner with engineering teams, traders, and technical stakeholders to design and implement solutions., • Participate in out-of-hours support on a rotational basis. Tech Stack • Languages: Python (3.10+), plus TypeScript/JavaScript for frontend work, and occasional Go for infrastructure tasks., • Messaging: RabbitMQ, Kafka, • Storage: PostgreSQL, Redis, • Environment: Linux, • Observability: OpenTelemetry, Prometheus, Grafana, Zabbix Requirements Must-haves • Strong software development experience, especially with Python., • A degree in Computer Science or another numerical discipline., • Clear communication skills, able to explain technical concepts confidently., • Good judgement around technical trade-offs and practical, effective approaches., • Experience with web scraping / reverse-engineering, including working around bot protection. Nice-to-haves • Experience with event-driven systems., • Comfortable in Linux/Unix environments., • Exposure to cloud migration or modern cloud setups (AWS ideal). Benefits • Competitive salary with strong bonus potential., • Enhanced pension contributions with salary-sacrifice options., • Private health insurance and life assurance., • Sabbatical option after five years., • 33 days’ annual leave (including bank holidays)., • The chance to work on technically interesting systems in a high-impact environment where your contributions genuinely matter.

Full Stack Software Developer Salary: £50,000 Location: London (3 Days In Office) Be part of a fast-growing team using AI and technology to modernise how the legal industry works, thinks, and delivers. The Opportunity This innovative company is driving digital transformation in the legal sector, helping law firms and corporate legal teams embrace technology for lasting impact. It's a fast-growing team that blends expertise in software development, data science, automation, and business change to deliver tailored, meaningful solutions. Employees thrive in a culture that values curiosity, collaboration, and continuous learning. With hybrid work options, a central London office, and strong benefits, the company fosters both professional growth and work-life balance. Joining this team means making a tangible difference while shaping the future of legal technology. The Role and Responsibilities This growing digital consultancy is seeking a motivated Full-Stack Developer to help deliver innovative software solutions that transform the legal industry. In this role, you'll collaborate with developers and stakeholders to design, build, and maintain scalable applications using technologies such as Python, JavaScript, TypeScript, alongside other techs dependent on client, however this company is tech agnostic. You'll contribute to projects across the full stack, developing APIs, experimenting with new tools, and supporting agile development practices. With at one to two years of industry experience, you'll bring strong problem-solving skills, curiosity, and a passion for continuous learning. This is a unique opportunity to grow with a supportive, fast-moving team that values creativity, collaboration, and technical excellence. For this role, candidates should have a degree in Computer Science. Interview Process: 3 Stages 1. 30min chat (virtual), 2. Testing stage (2 hours max), 3. Face to Face - go through code, present on code, live pair programming, high-level system design (2 hour) If you're a full-stack developer with a passion for AI and are looking for a role that blends hand on working with direct customer engagement and working for a start-up , we'd love to hear from you, apply today.

Associate Developer - London - Energy Trading - 60k RJC is looking for a Junior Software Engineer role for a global energy trading company based in London. Working as part of the Front Office, they are looking for someone who has a real desire to work in Trading and a wants to progress their career in challenging and exciting team. They are looking for someone who has good fundamental understanding of C# development and has a real desire to learn and implement new technologies. The ideal Full Stack Developer will have: • Strong educational background in Comp Science or a STEM degree, • Good fundamental knowledge of C# and SQL, • 1 or 2 years of commercial experience working in C# (Desirable), • Genuine desire or interest in working in financial services Apply with an up to date CV below to set up an initial call.

Product Designer (UX & Front-End) - Prestige Corporate Events 📍 Location: East Croydon (office-based, Mon–Fri) 💰 Salary: £30,000–£40,000 depending on experience 🧑 💻 Reports to: Head of Tech 🎟️ Perks: VIP event access, creative freedom, fast-paced team About Prestige Corporate Events Prestige Corporate Events is a luxury entertainment provider delivering unrivaled access to world-class sports and music experiences. From Monaco Grand Prix yacht packages, Wimbledon Debenture seats, and Champions League boxes, to bespoke international sports travel, we help companies impress their clients, build relationships, and create unforgettable moments. Following record growth, we’re hiring a Product Designer who will take the lead on creating seamless, elegant digital experiences - from idea to final UI. You’ll report to our Head of Tech and work closely with our Full Stack Developer, who will bring your designs to life. What You’ll Be Doing: 🎨 Design & UX • Design wireframes, user flows and high-fidelity prototypes in Figma, • Create and maintain a design system and component libraries, • Translate journeys and user personas into functional and elegant UI, • Design responsive layouts for landing pages, booking flows, and dashboards, • Prepare developer-ready files and support design handoff, • Use typography, colour, spacing, and hierarchy with confidence, • Think through navigation, information architecture, and mobile-first layouts 💻 Front-End Collaboration • Build or support building responsive layouts with HTML/CSS, • Work with Tailwind, Bootstrap, or similar frameworks, • Read/modify simple JavaScript for interaction and feedback, • Use Git for version control and inspect/debug browser UI issues, • Work side-by-side with a Full Stack Developer who builds your designs in code, • Understand how APIs, page structure and data flow influence design Who We’re Looking For: Must-Have Experience • 2+ years in Product Design, UI/UX, or a hybrid design/development role, • Strong skills in Figma (or Adobe XD, Sketch), • Excellent knowledge of HTML/CSS, responsive design, and modern layout techniques (Flexbox, Grid), • Experience creating and evolving design systems, • Confident presenting design decisions to technical and non-technical stakeholders, • Solid understanding of mobile-first and accessibility fundamentals, • Able to debug and support front-end builds with a developer mindset Nice-to-Haves • Experience with user testing, interviews, or internal user research, • Familiarity with WCAG accessibility standards, • Knowledge of SEO best practices for web layout and performance, • Experience designing emails or working with tools like Webflow / Framer, • Awareness of UX metrics (bounce rate, conversion, drop-off), • Comfortable using no-code tools, or contributing to design sprints Why Join Prestige? 🎯 Ownership: You design it, the Full Stack builds it - your work goes live and gets used 🎟️ Access to VIP sports and music events - from F1 to Glastonbury 💡 Creative autonomy in a fast-moving, entrepreneurial environment 📍 1-minute walk from East Croydon station 🥂 Join a team that combines hard work, high standards and high energy

Full Stack Developer – Hybrid - London • Do you love building both front-end and back-end systems?, • Are you comfortable switching between React components and Python?, • Have you worked in Cloud platforms (GCP, AWS, or Azure) ? About the Role Our client, a successful Public Affairs company are looking for a Mid-Level Software Engineer to join their talented engineering team to work on a mix of greenfield development and legacy systems. You’ll get to make an impact from day one shaping architecture and writing clean code. What You’ll Do: • You’ll rebuild a legacy user portal using React and Python., • Create modern interface for users to set up subscriptions, manage interests, and perform advanced searches with ElasticSearch., • You’ll contribute to developing a cloud-native data platform that processes and indexes large-scale web data, • Refine search algorithms and explore LLM-based features, • You will play a key role in advancing their microservices-based, event-driven architecture. What you’ll bring: • 3+ years of commercial software engineering experience with Python (FastAPI/Flask) and React., • Experience with cloud platforms (GCP /AWS/Azure) and Elasticsearch., • Familiarity with CI/CD and infrastructure-as-code tools like Docker, GitHub Actions, or Terraform., • Strong problem-solving mindset, comfortable with full-stack development, and collaborative in a cloud-native environment., • Microservices, event-driven architecture, data scraping,LLMs/NLP experience is a bonus. Ready to develop cutting-edge data platforms? Apply now or send your CV to

Backend Software Engineer / Developer (C# .Net SQL) to £180k+ Are you a technologist Backend Software Engineer 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 Backend Software Engineer 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 Backend Software Engineer / Developer 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 Backend Software Engineer / Developer (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.

Software Engineer / Full Stack Developer (C# .Net React) London / WFH to £70k Are you a Full Stack Software Engineer with C# .Net and React skills? You could be progressing your career in a senior, hands-on role at a global tech company that provide data centric software solutions to major blue-chip and government organisations to enable them to discover and analyse data and customer feedback. As a Software Engineer within a cross discipline Agile product team you will design and develop data centric software using a range of technology with C# .Net backend and TypeScript and React frontend; you'll also use a range of other technology in the stack including Snowflake, Azure, Python and SQL. The team has lots of Greenfield projects in the pipeline, you'll be able to take ownership and play a key role in the full software development lifecycle from architecture and design through to delivery. Location / WFH: There's a hybrid work from home policy, with 1-2 days a week in the London office. About you: • You have strong C# .Net backend skills, • You also have frontend development experience with React and / or TypeScript, • You have Azure cloud experience, • You have a data centric mindset, ideally with Snowflake and SQL experience, Python would also be great but bot essential, • You're collaborative with great communication and problem solving skills, you're comfortable mentoring and supporting more junior engineers on the team, • You're degree educated in a STEM discipline What's in it for you: As a Software Engineer / Full Stack Developer (C# .Net React) you'll earn a competitive package: • Salary to £70k, • Bonus, • Unlimited holiday allowance, • Flexible working, • Private medical insurance as well as well-being benefits, • Pension and Life Assurance, • Diverse and supportive environment with committees for wellness, charity and volunteering, DE&I, • Team and company socials Apply now to find out more about this Software Engineer / Full Stack Developer (C# .Net React) 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.

Quant Developer Pricing & Risk Technology Commodities Trading London | Full-Time, Permanent Overview Our client is a leading energy trading firm who are looking for a Quant Developer to join the Trading Technology group, focusing on the design, enhancement, and maintenance of a Python-based options pricing and valuation library. This system supports risk and valuation workflows across Oil, Power, Gas, and Equities, delivering real-time and end-of-day analytics for traders, risk, and quant teams. The role suits a technically strong quant engineer with expertise in Python, derivatives pricing, and financial mathematics - ideally with exposure to energy and commodity markets. Key Responsibilities • Develop, maintain, and extend Python pricing and risk libraries for options and structured derivatives (APOs, CSOs, ULDs, P1X)., • Implement and calibrate pricing models (vanilla and structured) and ensure alignment with front-office risk systems., • Design and maintain volatility surface calibration workflows, manage market data (curves, vols, correlations), and build robust fallback and proxy mechanisms., • Enhance library performance, calibration routines, and diagnostics; contribute to regression testing and CI/CD pipelines., • Act as SME for pricing models within the risk and trading tech stack, supporting global teams and resolving production issues. Key Skills & Experience • 5–10 years’ experience in quantitative development within Investment Banking, Finance, or Commodities (energy, oil, gas, power, etc)., • Advanced degree (MSc/PhD) in Maths, Physics, Financial Engineering, or related field., • Deep understanding of option pricing theory (Black-Scholes, local/stochastic volatility, Monte Carlo)., • Expert Python developer with strong numerical and vectorized coding skills (NumPy, SciPy, Pandas)., • Experience building and calibrating volatility surfaces and handling risk measures (Greeks, VaR, sensitivities)., • Strong background in stochastic calculus, numerical methods, and optimization.