16 software engineer jobs found

Senior Software Engineer (Platform focused) | Contract | £500 per day Initial 3 month engagement | Outside IR35 | 3 days per week onsite central London Seed-stage AI-native company taking on a major UK regulated services market. Backed by top-tier European VCs, founders include the team behind one of the UK's best-known modern consumer brands. Public launch later this year. Working MVP exists. The job is to take it from prototype to the platform that supports launch and scale. You will: Design and own the architecture of the platform - the state machine, workflow engine, API layer and data model that orchestrate every transaction Own infrastructure, deployments and CI/CD - ensure the platform is reliable, scalable and fast as they grow from launch to thousands of concurrent transactions Build and maintain security practices appropriate for a regulated firm - data encryption, access controls, audit logging, penetration testing You'll need: 5+ years...

We are looking for a Creative Software Engineer, with a strong UX / UI focus to join our London team on a 9-12 month Fixed Term Employment Contract (to cover parental leave). This is an exciting opportunity that will challenge your frontend skills with a lot of opportunities for project ownership across our movie and music industry clients. Projects range from immersive WebGL experiences through to high concept websites and cutting edge interactive activations. If you're looking to play an important role in shaping the performance and future of unique web products and creative marketing, Powster is the place for you. To keep our culture of collaboration strong, this role requires you to come into the office in Hackney Wick on Tuesdays & Thursdays. This is a 9 - 12 month fixed-term employment contract role, to cover parental leave. What You'll Do Interactive, Immersive Web Development: You will be owning creative web application builds, representing our...

C++ Software Engineer - Outside IR35 Contract London, UK Long-Term Engagement on a Rolling Contract Hybrid Working We have partnered with a leading Technology Firm who are looking to add a Software Engineer with skills on C++ to their Market Data team! The succesful candidate will have experience in Financial Markets Technology and realtime market data expertise. It's a Front Office position so you must be comfortable speaking with Portfolio Managers, Traders, C-Suite etc... Responsibilities will include : Architecture and Implementation of Low Latency C++ systems (robust, resilient, accurate, stable and fast) - by doing this you will position the client as a leader in Quant Trading. Work alongside hardware and software teams to build realtime market data processing. Define, implement and enforce SLAs, policies and metrics to monitor the area. Develop Systems, Interfaces and tools to historical market data simulations to increase research productivity....

C + + Software Engineer - Outside IR35 Contract London, UK Long-Term Engagement on a Rolling Contract Hybrid Working Up to £750 per day (Outside IR35) We have partnered with a leading Technology Firm who are looking to add a Software Engineer with skills on C + + to their Market Data team! The succesful candidate will have experience in Financial Markets Technology and realtime market data expertise. It 's a Front Office position so you must be comfortable speaking with Portfolio Managers, Traders, C-Suite etc... Responsibilities will include : Architecture and Implementation of Low Latency C + + systems (robust, resilient, accurate, stable and fast) - by doing this you will position the client as a leader in Quant Trading. Work alongside hardware and software teams to build realtime market data processing. Define, implement and enforce SLAs, policies and metrics to monitor the area. Develop Systems,...

Lead Software Developer – SC Cleared Hybrid – London 1-2 times per month | Outside IR35 | £700 per day | 12 Month Contract We’re supporting a major public sector programme delivering modern digital services and are looking for an experienced SC Cleared Lead Software Developer to join the team on a contract basis. Required Experience Active SC Clearance. Commercial experience with JavaScript and TypeScript. Strong frontend development experience using React. Backend development experience using Node.js. Hands-on cloud experience with AWS, Azure, or GCP. Experience working within public sector or regulated environments is highly desirable. Key Responsibilities Lead the design and development of scalable full stack applications within secure public sector environments. Drive best practice across modern JavaScript/TypeScript engineering teams. Build and maintain frontend applications using React. Develop backend services and APIs using Node.js. Work across...

Rust Developer – SC Cleared Fully Remote | Outside IR35 | £500-£600 per day This is for a client within the public sector defence space, the project is security cleared so there is limited details, please reach out if you are a strong Rust developer with active SC clearance. Requirements Strong commercial experience with Rust Backend-focused engineering background Experience building scalable, high-performance systems Comfortable working within secure/government environments Active SC Clearance is essential One-stage interview process - Immediate interview slots available Please send me your number and CV ✉️

Data Engineer - Outside IR35 - Contract - SC ESSENTIAL A rare opportunity to join our fast-growing technology company selling high-value software development services. You will be working within a Government department as part of an existing team to support the rollout of a new Database. Must have Several years' experience with data modelling, data mapping, and defining data standards Experience working with complex, multi-organisation data landscapes Track record of delivering clarity in the presence of ambiguity Experience working with senior stakeholders to define strategy Nice to have Experience working with central and/or local government Familiarity with housing / property / regulatory datasets Experience implementing data standards that have already been defined Your approach You are passionate about delivering great technical quality, whether building greenfield solutions or improving the quality of legacy systems You hold...

AI Engineer - Finance Transformation Project AI Engineer | Contract | 6 Months | London (2 days/week) | £650-700/day | Outside IR35 We’re working with a London-based business investing heavily in AI as part of a wider transformation across its finance function. They’re looking to bring in a senior contractor to work closely with the programme leadership team and help turn early AI ideas into practical, production-ready solutions that can genuinely improve how finance operates. This is a hands-on role for someone who can build, shape technical direction and partner effectively with stakeholders across finance and technology. The environment is particularly well suited to someone who understands how to apply AI in a business-critical setting, rather than just experimenting at the edges. This is an initial 6 months, outside IR35, 2 days a week in central London and at £650-700pd. Key Responsibilities Build and deliver AI-enabled solutions that...

Working at The Adaptavist Group The Adaptavist Group is a global family of companies with a common goal. We combine the best of teamwork, technology, and processes, helping all kinds of businesses be better today and tomorrow. We are experts at delivering enterprise software, tailored solutions, and quality services across some of the world’s most trusted technology ecosystems, including Atlassian, AWS, Slack, GitLab, monday.com and Aha! We make change happen. From anywhere. What We Offer You We offer a very generous holiday (PTO) allowance, trusting you to take vacation time that suits your personal life, alongside flexible working hours that empower you to work when it best fits you and your team. We provide MacBooks to all employees and additional support for fully remote workers to set up their home offices. Our exceptional Time Away Policy includes 26 weeks of fully paid leave for birthing parents, 13 weeks for non-birthing parents, and extended leave for adoption,...

Contract - Lead AI Engineer (Python) Job description Job Title: Lead Python Engineer Location: Hybrid (United Kingdom) Duration: 6 months Contract Start Date: ASAP IR35: Inside Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte. Required Skills & Experience: • Advanced Python Proficiency: Demonstrated expertise in Python development. • Code Repository Ownership & Management: • Ability to effectively own and manage code repositories, ensuring best practices are followed. • Advanced...

Build Engineer | Bazel 📍 London 🏠 Hybrid work model - 3 days in the office, 2 days wfh 💶 Up to £700/day - Outside IR35 📄 6 months contract with possible extensions 5V Tech are working with a fast-growing deep tech company building a completely new class of AI accelerator hardware and software from first principles. They’re now looking for an engineer to take ownership of Bazel at scale and build the tooling infrastructure that powers the entire engineering organisation. This is a genuinely high-impact role in a greenfield environment, where you’ll help shape the build systems, developer workflows, and CI infrastructure from the ground up. What you’ll be working on: • Designing and owning Bazel rules and extensions • Scaling a large monorepo across Python , C++ , Rust , SystemVerilog, and ML workloads • Building reproducible, multi-language build pipelines • Optimising CI performance across large compute clusters • Improving the...

Delivery Manager - Software Engineering, Retail Banking Xpertise have an urgent requirement for a Delivery Manager - Software Engineering, Retail Banking Candidates will have the following key skills and experience: Proven experience as a Delivery Manager or Project Manager leading software engineering teams Strong background in delivering complex technology programmes within retail banking or financial services Experience within digital banking, challenger banks, or fintech startups Experience working in a startup environments Proven experience with Agile methodologies (Scrum/Kanban) and Agile frameworks (Jira, Confluence) Experience working with engineering teams across Back End, Front End, and cloud-based architectures Familiarity with modern engineering practices (CI/CD, DevOps, microservices) Role is outside IR35 - hybrid London - 2 days/week Please send CVs immediately for more information Delivery Manager - Software Engineering, Retail Banking

Lead Backend Software Developer (Contract) London, Outside IR35 £500- £600 per day This is an exciting opportunity to join a fast-moving engineering function at a pivotal moment of technical uplift. They are investing heavily in strengthening their core platforms and commercial data systems, creating a strong mandate for senior engineers to step in, lead, and make an immediate impact. The Company They are a growing digital gaming organisation operating across multiple markets, currently modernising their backend ecosystem. With distributed teams across the UK and Europe, they are building scalable platforms that support a variety of customer-facing and internal products. Engineering quality, strong technical leadership, and delivery excellence are central to their transformation. Contractors join at a time when technical ownership is expanding in-house, creating real scope to shape systems and standards. The Role and Deliverables: * Lead...

Engineering Manager - £580 to £585 per day outside IR35 - Hybrid (3 days per week in the office) Please note: This is a contract role with the expectations that candidates will be in the office 3 days per week in London. La Fosse have partnered with a consulting business to recruit an experienced Engineering Manager into their established team. This role is suited to a hands-on leader with a strong background in Java/JVM environments, driving the delivery of scalable microservices. You’ll champion automation and DevOps practices, working across CI/CD pipelines, testing, and cloud-native platforms to deliver high-quality software at scale. Key Requirements: Strong commercial experience in Java/JVM environments, with the ability to lead and mentor engineers Experience designing and delivering microservices-based architectures Advocate of DevOps practices (“you build it, you run it”) Solid understanding of CI/CD pipelines, including build, test, and...

Role Oracle Solution Architect - Lead Architect for the Managed Service Employer VE3 Engagement UK Public Sector - Oracle ERP Managed Service Contract type Contract Outside IR35 Duration Length of the managed service contract Location UK only. Hybrid with on-site attendance at client locations across the UK as required Security clearance SC clearance and UK Nationality essential. Pre-cleared candidates strongly preferred. Eligibility for DV sponsorship desirable if role scope includes privileged administrator access Reports to VE3 Account/Engagement Director (with strong functional line into the Service Delivery Manager) Key interfaces Client Design Authority, client Enterprise Architecture, client Service Owner and Platform Owner, VE3 Security Lead, VE3 Service Delivery Manager, third-party software vendor (Oracle), other third-party providers Role purpose The Solution Architect is VE3's Lead Architect with overall...

𝗦𝗲𝗻𝗶𝗼𝗿 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 (𝗙𝗶𝗻𝗮𝗻𝗰𝗲 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗥𝗲𝗾𝘂𝗶𝗿𝗲𝗱) London | Contract | Outside IR35 | Conquer AI 𝗙𝗶𝗿𝘀𝘁 𝗔𝗜 𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗵𝗶𝗿𝗲 - 𝗢𝗿𝗶𝗴𝗶𝗻𝗮𝘁𝗶𝗼𝗻 𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻, 𝗴𝗹𝗼𝗯𝗮𝗹 𝗮𝗹𝘁 𝗮𝘀𝘀𝗲𝘁 𝗺𝗮𝗻𝗮𝗴𝗲𝗿 Conquer AI is hiring a 𝗦𝗲𝗻𝗶𝗼𝗿 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗔𝗜 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 on behalf of one of our clients, a global alternative asset manager building a brand new AI capability inside their Origination team. 📍 London, 4 days onsite 📄 12 months, Outside IR35 💷 Day rate DOE — 𝗧𝗵𝗲 𝗯𝗿𝗶𝗲𝗳 Work directly with a Partner to build the AI systems behind how the firm sources, shapes and wins deals. First hire in, you set the technical direction, the patterns and the bar. 𝗪𝗵𝗮𝘁 𝘆𝗼𝘂'𝗹𝗹 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝗯𝘂𝗶𝗹𝗱 • Production RAG and agentic systems over deal docs, sponsor data and market intel • LLM pipelines with real grounding, evaluation, citation traceability and refusal logic, not chatbots that hallucinate at a Partner • Hybrid retrieval (dense + sparse), proper chunking for structured content, calibrated...