40 contract developer jobs found in London

Power BI Developer | London Market Insurance | Delegated Authority experience is essential | Outside IR35 Contract Our sister company Stellarmann is seeking a Power BI Developer to join a leading London Market insurer on an initial contract until the end of the year. You'll play a key role in a major Reporting Transformation Programme, helping to modernise enterprise reporting by migrating Legacy reporting solutions onto a modern Azure-based data platform and Power BI architecture. Working closely with underwriters, business stakeholders and Data Engineering teams, you'll design and develop scalable Power BI reporting solutions while helping to refine business requirements, create user stories and shape reporting architecture. This is an excellent opportunity for someone who enjoys combining hands-on Power BI development with stakeholder engagement and solution design. You'll be a great fit if you have: Delegated Authority/Bordereaux reporting experience is essential...

A leading business is hiring a Agentic AI Developer. Hybrid position. 12-month rolling contract, paying up to £1000 per day, depending on experience. Experience and skills required for the Agentic AI Engineer, Agentic AI Developer, Python Fluency with modern ML toolchains (PyTorch/JAX, agentic frameworks, MCP). Experience with AI agent ecosystems using frameworks such as LangChain, AutoGen, CrewAI, and Semantic Kernel. Solid software-engineering fundamentals - tested, documented, maintainable Python Familiarity with libraries such as TensorFlow, PyTorch, LangChain, or Ray is a plus. Exposure to Knowledge Graphs (Neo4j / RDF / graph-based enrichment or retrieval). Experience with either Docker, Kubernetes, cloud (AWS / Azure) Experience integrating LLM APIs (OpenAI or similar), with prompt design and orchestration. Hands-on experience training and deploying learned policies for complex behaviours in robots or simulated characters is a bonus Ability to write...

Senior C# IAM Developer - Auth0, Identity & Access Control, AWS – OUTSIDE IR35 Contract: 8 months Rate: £700 - £750 OUTSIDE IR35 Location: 100% remote The Role: Working for a global, market leading B2B SaaS business, you’ll lead the design and implementation of secure, identity-driven backend services in a modern C#/.NET environment. Your work will centre on authentication, authorization, and secure event-driven architectures. You’ll own our Auth0 integration end-to-end , ensuring our platform meets strict security, compliance, and reliability standards. This is a role for someone who thinks deeply about threat models, defence-in-depth, and secure-by-default engineering. What You’ll Do: Architect and implement secure backend services in C# & .Net Own and evolve our Auth0 identity platform: tenant configuration, flows, hooks, rules, MFA, RBAC Design and maintain token-based security models (OIDC, OAuth2, JWT lifecycle, refresh...

📱 Senior iOS Engineer – 6-Outside Month Contract | Central London | Fintech Scale-Up   🚀 We’re working with a leading fintech scale-up looking for an experienced Senior iOS Engineer to join them on an initial 6-month contract (Outside IR35).   🧠 This is a senior, technically focused role for someone who enjoys working beyond feature delivery and has a strong interest in architecture, scalability and improving how iOS applications are built and maintained.   What we're looking for Strong commercial Swift / native iOS experience Excellent understanding of modern iOS architecture Experience working on large or complex mobile applications Strong knowledge of modular application design Experience with shared components, libraries or reusable functionality Good understanding of CI/CD, testing and release processes Comfortable making architectural decisions and influencing technical direction Able to work...

BI DEVELOPER LONDON3 DAYS ONSITE OUTSIDE IR35 £450 TO £500 PER DAY This is an opportunity to join a business undergoing a major data transformation programme, helping to build a trusted reporting environment across multiple business functions. You will play a key role in shaping data architecture, improving integration's, and delivering meaningful Power BI insights that support strategic decision-making. The Company They are a well-established, commercially focused organisation with a strong international presence. As part of an ongoing data integration initiative, they are bringing together information from multiple systems across finance, HR, operations, and client-facing functions. They are investing in creating a single source of truth to improve reporting, data visibility, and business performance. This contract offers the chance to make a tangible impact within a complex and evolving environment. The Role and Deliverables Engage with senior stakeholders to gather...

Outside IR35, Uk Wide Flexibility on Location, Salesforce Developer, Marketing Cloud, Sales Cloud, Immediate start My leading client in the regulatory area is looking for a Salesforce Developer to join a major digital transformation programme; this is a hands-on role development role working on enhancements and integration's. Key Experience Developing and enhancing custom functionality across Sales Cloud, Service Cloud, and Marketing Cloud Building and optimising Apex code, Lightning components, and integration's Supporting delivery, including new features, fixes, and performance improvements Working closely with product owners, architects, and internal technical teams Helping stabilise and extend an in-flight project where speed and quality both matter Key Skills Proven experience as a Salesforce Developer in complex environments Strong skills in Apex, Lightning Web Components, API integration's Experience with Marketing Cloud (desirable but not essential) Ability...

WE ARE: At Adaptive, we are a financial consulting firm that partners with capital, commodity, and digital market participants. We value differentiation through technology. Our experienced teams design and deliver complex front-office technology solutions using our proven accelerators to create long-term competitive advantage. Our clients include the world's leading investment banks, investment managers, fintechs and capital market service providers. With a global reach with offices in London, New York, Barcelona, Montreal and Manila, we have a proven track record delivering powerful, elegant and intuitive trading technology solutions. We are expanding our product capability and looking for talented individuals to help build transformational capital markets products including: Aeron - our flagship high-performance messaging infrastructure. Hydra - our developer framework for accelerating the development and delivery of trading systems. Artio - our market-leading...

A well-established international specialty insurance organisation is expanding its finance systems capability following continued growth and investment in reporting, data and automation. As a consequence they are looking to engage a consultant on an OUTSIDE-IR35 basis for an intial 6-month term. This creates an excellent opportunity to join a complex, data-led environment where finance technology i click apply for full job details

Developer Enablement SME Platform Engineering Developer Experience - Outside IR35 - rate negotiable - remote UK - Mid October start date - Must hold active SC A major technology transformation programme is looking for a Developer Enablement SME to help engineering teams adopt and get maximum value from a modern developer platform click apply for full job details

Title: Software Developer in Test Client: Growing Fintech Rate: up to £600 P/D (Outside IR35!) Location: London (Hybrid) We are looking for a talented an enthusiastic SDET to join a rapidly expanding fintech based in London! You will get the chance to work along side some of the best SDETs and software engineers that the industry has to offer whilst aiding in the development of their C# platforms! If you are a tech driven and enthusiastic individual this is the role for you! Requirements: Strong experience in automation testing - building and implementing frameworks etc Strong experience working with C# Experience with JavaScript - nice to have Experience working in capital markets finance Experience with performance testing If this sounds like you then please do not hesitate to reach out!

Salesforce Developer Initial 6 months Outside IR35 3 days a week on site in London, 2 days remote   We are looking for an experienced Salesforce Developer to join a growing Core Systems engineering team, developing and supporting business-critical Salesforce solutions. You’ll work across Salesforce Classic, Apex, Visualforce, integrations, and AutoRABIT CI/CD, collaborating with technical and business stakeholders to deliver secure, scalable solutions.   Key Responsibilities Develop and maintain Apex Classes, Triggers, Visualforce Pages, Batch & Scheduled Jobs Support and enhance Salesforce Classic applications Build and maintain REST/SOAP integrations Troubleshoot production issues and deliver enhancements Manage deployments and releases using AutoRABIT Write unit tests and maintain 85%+ code coverage Participate in Agile ceremonies, code reviews, and technical design   Key...

A well-established international specialty insurance organisation is expanding its finance systems capability following continued growth and investment in reporting, data and automation. As a consequence they are looking to engage a consultant on an OUTSIDE-IR35 basis for an intial 6-month term. This creates an excellent opportunity to join a complex, data-led environment where finance technology i click apply for full job details

Developer Enablement SME Platform Engineering Developer Experience - Outside IR35 - rate negotiable - remote UK - Mid October start date - Must hold active SC A major technology transformation programme is looking for a Developer Enablement SME to help engineering teams adopt and get maximum value from a modern developer platform click apply for full job details

Product Designer (UX/UI) - B2C/Retail Contract: Initial 3 months Rate: £450 per day (Outside IR35) Location: Shepherd's Bush - 1 day per week onsite A global retail organisation is seeking a Product Designer to join its established product function on an initial three-month contract. You will work across UX and UI, adapting and localising an already successful UK digital product for a new European market. This is a hands-on position requiring someone who can take ownership of design work, deliver at pace and produce polished, customer-focused experiences across web and mobile applications. Key Responsibilities Adapt, localise and refine existing UK web and app experiences for a new European market Own design tasks from initial concept and UX exploration through to final UI execution and developer handover Apply strong UX thinking and high-quality visual design across web and mobile touchpoints Collaborate closely with product, engineering...

J ob Title: Python Engineer Location: UK Based - Fully Remote Salary/Rate: Up to £175 Daily Outside IR35 Start Date: In the next two weeks Job Type: Initial 6 month contact Company Introduction We have an exciting opportunity now available with one of our sector-leading consultancy clients! They are currently looking for a Python Engineer to join their team for an initial six-month contract. Job Summary: We are seeking a dynamic and passionate Python Developer to join our innovative software development team. In this role, you will be instrumental in designing, developing, and maintaining scalable applications that drive our core business operations. Your expertise will help shape the future of our technology solutions, ensuring high performance, security, and seamless integration with various platforms and services. This position offers an exciting opportunity to work with cutting-edge tools and technologies in a fast-paced environment committed to excellence...

My client, a Global Supply Chain organisation are looking to recruit an experienced Blue Yonder WMS Developer for an intial 6 month contract to start ASAP. Key Responsibilities: Develop, configure, and deploy Blue Yonder WMS customisations and integrations in line with business requirements and best practices. Code quality, documentation, and solution design. Perform enhancements, upgrades, and system configuration within the Blue Yonder MOCA architecture. Design and implement WMS reports, interfaces, and data extracts using SQL and related tools. Conduct thorough unit testing to ensure solution quality and performance. Participate in system upgrades, patches, and version migrations, ensuring minimal disruption to business operations. Produce and maintain comprehensive technical documentation, including functional specifications, configuration records, and operational procedures. Provide second and third-line support for Blue Yonder WMS incidents and change...

Senior C# Developer - Investment Banking £750/day | Outside IR35 | 12-month rolling contract | Largely Remote If you're a strong C# engineer with genuine Event Sourcing experience and interested in a long term banking project, get in touch I'm working with a leading investment bank looking for a strong Senior C# Developer to join a long-term project building and enhancing a large-scale Structured Notes platform. This is a hands-on engineering role with approximately 80% Back End C#/20% frontend, working on complex, distributed systems. The role: You'll be working across a modern .NET platform, designing and developing scalable Back End services while contributing to the Angular Front End where required. The environment involves large-scale distributed systems, asynchronous processing, Multithreading and event-driven architecture. Core technical requirements: Excellent C#/.NET development experience Strong .NET 8 knowledge Previous commercial Event...

Senior DevSecOps Engineer AWS | EKS | Platform Security | Financial Services ?? Location: London/Hybrid ?? Day Rate: Up to £650 (OUTSIDE IR35) ?? Contract: Initial 6 Months We're supporting a major financial services organisation delivering a next-generation cloud platform that will underpin multiple strategic programmes and engineering teams. As a result, we're looking for a hands-on DevSecOps Engineer to join the platform security function and help build the guardrails, controls and automation that allow product and engineering teams to scale securely by default. This is an engineering-first role focused on AWS, Kubernetes, CI/CD security and platform protection. You'll work alongside Platform Engineering, Developer Platform and Security Architecture teams to ensure security is Embedded into the platform rather than bolted on afterwards. What You'll Be Doing Engineering and maintaining security controls across a multi-tenant AWS platform Implementing and...

Senior DevSecOps Engineer AWS | EKS | Platform Security | Financial Services Location: London/ Hybrid Day Rate: Up to £650 (OUTSIDE IR35) Contract: Initial 6 Months We 're supporting a major financial services organisation delivering a next-generation cloud platform that will underpin multiple strategic programmes and engineering teams. As a result, we 're looking for a hands-on DevSecOps Engineer to join the platform security function and help build the guardrails, controls and automation that allow product and engineering teams to scale securely by default. This is an engineering-first role focused on AWS, Kubernetes, CI/CD security and platform protection. You 'll work alongside Platform Engineering, Developer Platform and Security Architecture teams to ensure security is embedded into the platform rather than bolted on afterwards. What You 'll Be Doing Engineering and maintaining security controls across a multi-tenant AWS...

Technical Business Analyst/Technical Product Owner: Adobe Experience Platform & Enterprise Data Alignment Client is building out its customer data and personalisation capability on Adobe Experience Platform. They need a Technical BA/Product Owner who can take business requirements from marketing and digital teams, translate them into precise XDM specifications, and make sure what lives in Adobe stays aligned with the central enterprise data platform. In practice, this role owns the parity between the two. You will understand the business ask, define the schema and data dictionary in Adobe, and specify what the enterprise data team needs to deliver so both sides describe and supply customer data consistently. The strongest candidates will bring genuine depth in data analysis and data modelling. Hands-on Adobe tooling experience is strongly preferred, although exceptional data specialists with a clear ability to get up to speed on the Adobe stack quickly will be...