senior java full stack developer jobs in London

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...

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...

Location: Barcelona, Spain (Hybrid)Contract: PermanentStart: Immediate / ASAP preferredWhiteshield combines artificial intelligence with economic expertise to solve real policy challenges. Our AI Economics unit transforms complex data into actionable insights that shape how governments and businesses design policies, manage resources, and plan for growth.As...

Location: Barcelona, Spain (Hybrid)Contract: PermanentStart: Immediate / ASAP preferredWhiteshield combines artificial intelligence with economic expertise to solve real policy challenges. Our AI Economics unit transforms complex data into actionable insights that shape how governments and businesses design policies, manage resources, and plan for growth.As...

Responsibilities Build and enhance complex GUI applications used in real-time environments Develop trading, operational and workflow management tools Design and build Python services, APIs and backend components Work on event-driven and distributed systems handling large volumes of data Create intuitive dashboards and visualisation tools for...

SK IT Solutions Limited is seeking a skilled Web Developer to join our growing IT team in London. You will design, develop, test, and maintain websites and web-based applications to meet business and client requirements.You should have strong knowledge of modern web technologies, problem-solving abilities, and the ability to work independently and with...

Senior Java Developer - Outside IR35 - Up to £700 per day Hybrid in Central London October Start Date 12-Month Initial Contract We have partnered with a leader in the financial services sector who is looking for experienced Senior Java Engineers to join their Settlements team. This is a hands-on engineering role focused on developing and enhancing software...

HybridEngineeringContractLondon is seeking an experienced Java developer to join our team on a 12 month contract outside IR35. You will help define and deliver solutions iteratively, mentor the development team and drive adoption of new technologies to deliver business value.The role is on-site in Paddington, London, three days per week, and requires prior...

This is an opportunity to work at the heart of a world‑class investment platform where risk, technology, and quantitative thinking intersect in real time. You’ll be building and owning systems that directly support portfolio managers and senior risk leaders, in an environment that values engineering excellence, speed, and thoughtful design. If you enjoy...

Citi in London is seeking a Lead Java Developer to drive the development of real-time and on-demand risk systems within our global trading and risk framework. You will own the full development lifecycle, from architecture to production support, and collaborate with London-based traders, risk teams and technology partners.The role offers exposure to...

Job Description Software Developer with Full Stack C# and SQL Server Our Client is an international company in the media industry. They are looking to recruit an additional Software Engineer/Developer with full stack software development experience. Must have at least 2 to 4 years of hands-on software development covering both front and backend development....

Avanti Recruitment is recruiting for a Senior Java Full Stack Developer to join an established, international software company based in Central London. The company develops complex, business-critical enterprise software used by major organisations internationally. Its products support high-volume transactions and essential business operations, giving...

Cohere is hiring to advance North, our AI workspace platform. You will build features and ship autonomous agents that securely access sensitive enterprise data, using minimal, robust code for low-resource environments.You’ll collaborate with researchers to productionize cutting-edge models, while navigating a fast-changing enterprise landscape. We value...

Health Data Innovations, Inc. seeks a Senior Full-Stack Engineer to own features end-to-end—from React interfaces to Python services and data models. You’ll ship SaaS features in a high-growth startup, balancing browser and server logic for low latency and scalable performance.You’ll work in a flat, flexible team, building AI-enabled healthcare tools...

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...

Full Stack Engineer - (Ideally Oil & Gas systems experience) - £90k + Bens Hawksworth is recruiting a Full Stack AI Engineer to join a growing technology company building a new AI-native digital platform for the Energy and Oil & Gas industry. This is a genuinely hands-on engineering role working on a new platform that will integrate with some of the world's...

Build and enhance complex GUI applications used in real-time environmentsDevelop trading, operational and workflow management toolsDesign and build Python services, APIs and backend componentsWork on event-driven and distributed systems handling large volumes of dataCreate intuitive dashboards and visualisation tools for business-critical...

Job ID: 1 Posted: 2026-10-26Location: London, England, United KingdomCategory: TechnologyCompany: CitiEngineer the future of global finance.Are you ready to apply Make sure you understand all the responsibilities and tasks associated with this role before proceeding.At Citi, our Tech team doesn’t just support finance – we are helping to redefine it.Every...

Contribute to the design, development, and deployment of robust software solutions, promoting best practices throughout the software development lifecycleContribute to architecting and maintaining complex data engineering pipelines, backend services, and APIs to ensure scalability, reliability, and high performanceSupport the thorough review of Python and...

About the Role FinTech Horizon Ltd is seeking a talented and experienced Senior Full-Stack Developer to join our growing engineering team in London. In this role, you will be responsible for designing, building, and maintaining robust web applications that power our next-generation financial platform. You will work closely with product managers and UI/UX...