senior java full stack developer jobs in London

Ki Insurance is seeking a Full‑stack Engineer to build robust, scalable software for web‑based applications and enhance the Ki platform. You will design, implement and maintain APIs, collaborate with Product and UX, and drive quality through automated tests and code reviews.The role requires mid‑senior level experience across a modern web stack, with...

FlexTrade is seeking a Senior Web Developer to join the FlexONE team and own critical product surfaces across web and mobile apps. You’ll work end-to-end on a Scala + Play backend and a React + AG-Grid frontend, using gRPC for communication with our core product’s backend systems.You will lead the technical direction as we build our Web app from an MVP...

Select how often (in days) to receive an alert: Senior Software Engineer, Full-Stack Applications - Ratings Technology (London) Requisition ID: 50676 Business Unit: Fitch Group Category: Information Technology Location: London, GB Date Posted: Sep 18, 2026 As one of the world’s top three credit ratings agencies, Fitch Ratings plays a critical role in...

Steven.com is building the operating system for the creator economy, and its ITO team is hiring to build products from zero to production across the full stack. You will move between existing products, beta products scaling up, and moonshots, turning ambiguous problems into scalable technical solutions.You will prototype fast, run experiments, iterate on...

Infused Solutions Ltd in London is seeking a Senior Full-Stack Engineer to join an early-stage AI startup building an agentic platform for institutional finance. You'll contribute across the stack and own features end-to-end.You will work closely with founders, shape product and technical direction, and influence architecture while delivering...

As one of the world’s top three credit ratings agencies, Fitch Ratings plays a critical role in global capital markets by providing credit analysis, ratings, research, and commentary to financial market participants. For over 100 years, Fitch Ratings has been creating value for global markets through its rigorous analysis and deep expertise, which have...

Falconsmartit in London, UK, is seeking a Full Stack Developer to design and implement scalable microservices and modern front-end applications. You’ll work with Java Spring Boot and React JS, while leveraging AI-assisted tools to maximize productivity.You will containerise deployments with Docker and Kubernetes, manage CI/CD pipelines, and collaborate...

CoinDesk is seeking a Senior Full-Stack Engineer to join the Media Engineering team. You will own complex features across web, mobile apps, and services, with a focus on performance, reliability, and security.You will work with Next.js, React, Node.js, and TypeScript, applying automated testing and DevSecOps principles. Experience with AI tooling and...

A tech company in the United Kingdom seeks a proactive and team-oriented developer for a fully remote position. The ideal candidate will collaborate with enterprise clients and tackle complex challenges. Proficiency in React, Node, Express, Mongo, and SQL is required. The company offers growth opportunities in a flexible environment with meaningful projects....

A leading global financial services firm is seeking a Senior Vice President, Full-Stack Engineer to lead high-impact teams in London. This role involves end-to-end delivery of mission-critical software, elevating engineering standards, and collaborating closely with product and business stakeholders. Ideal candidates should have proven leadership of...

Oscar Technology is seeking a Full Stack Engineer for a central London role with three days on-site. You will own the full stack from database to UI, designing data-heavy interfaces in TypeScript/React and building scalable Python services with multi-tenant PostgreSQL schemas.You’ll work closely with senior leadership in a small, high-ownership London...

A leading payments platform in the UK is seeking a Senior Full-stack Software Engineer to design and develop enterprise-level products. The ideal candidate will have over 3 years of experience with .NET Core and front-end technologies such as React. This role emphasizes collaboration and communication, contributing to the product's continued development, and...

Wave Group in London is seeking a Senior Full Stack Engineer to own features from discovery to production. You will build LLM-powered and real-time features across a modern TypeScript stack (React, Next.js, Node, NestJS) with Postgres/AWS and work directly with the founders to shape technical and product direction.The role offers hybrid work with 3 days...

Addition is a growing technology consultancy delivering AI and ML solutions to UK government clients. You will lead and craft scalable software across front-end, back-end and data layers, combining hands-on engineering with technical leadership.Expect meaningful impact, modern tech and a supportive team. Hybrid role with one in-office day per week in...

ThisThat is hiring a Senior Full-Stack Product Engineer in London (Shoreditch). You will own and drive major domains in a growing product platform, building across four key products including an internal survey platform, a scale-ready SaaS product, an intuitive survey interface, and a client platform powered by AI agents.We value autonomy, curiosity, and a...

Iterum Trading Limited is seeking a Mid‑Level to Senior Full Stack Developer in London to help build Iterum IQ, focusing on AI/ML‑driven features. You’ll work closely with the Head of Product and a Fractional CTO, shaping architecture and mentoring junior developers.The role offers a path toward Head of Technology, with a hybrid London work arrangement...

A dynamic software development company in Greater London is seeking a Senior Full Stack Software Engineer. In this role, you will design and maintain scalable applications, leveraging your expertise in TypeScript, Node, Next.js, and React. You will mentor junior engineers, conduct code reviews, and tackle technical challenges proactively. Candidates should...

Applied Data Science Partners Ltd. in London is seeking a Senior Full-Stack Developer to lead the design, development, and deployment of complex software solutions. You will architect data pipelines, backend services, APIs, and ensure scalable, high‑quality UI/UX across industries.You will work with Python and TypeScript, cloud deployments, Docker, and...

Heidi in London is seeking a Senior Full-Stack Engineer to own end-to-end features from database to browser, including the React interface, Python services, and the underlying data model. You’ll ship SaaS features for clinicians, balancing frontend performance with robust backend design.You’ll build fast interfaces in React/TypeScript/Next.js, design...

JPMorgan Chase is seeking a Full Stack Software Engineer to join the Corporate Sector - Data Center Services. You will contribute to building secure, scalable technologies, delivering AI-enabled features, and ensuring high-quality production code within an agile team.The role emphasizes frontend Angular with NGRX, backend NodeJS, and collaboration across...