Top Java Developer Jobs in London

Lead Java Developer responsible for delivering Real-Time and On-Demand Risk enhancements, managing the full development lifecycle, collaborating with global teams, and driving operational improvements.

As a Full-stack Java/Clojure Developer, you will develop and enhance software for OTC Derivatives Data, collaborate with teams, maintain applications, and ensure high-quality delivery following best practices.

Ownership and hands-on development of Core Prime Brokerage components using Java/Kotlin. Contribute to agile SDLC, CI/CD, and automated testing. Design, estimate, analyze tasks, collaborate with stakeholders, provide production support and incident resolution, perform code reviews, and coach junior team members.

Build, maintain, and scale a multi-venue collateral management platform and related reference data and accounting systems. Design resilient, real-time event-driven distributed systems, integrate trading venue data, contribute to architecture, and own production delivery and support.

The FX Risk Lead Java Developer designs and maintains Java microservices for high-throughput applications, optimizes data processing solutions, and ensures system reliability in a cloud-based environment.

Develop and maintain high‑performance trading applications for equities finance, collaborating with traders and global teams. Design, code, test (TDD/BDD), debug, and deliver solutions, mentor mid‑level engineers, and ensure compliance and risk-aware decisions.

Design, build and maintain Java-based automated test frameworks and suites (UI, API, integration, regression). Drive shift-left testing, create Gherkin test cases, ensure traceability, execute tests in CI/CD, investigate defects, manage test data, and collaborate with product and engineering teams to improve quality across the SDLC.

Lead full-stack development using Java/Spring and Vue/TypeScript. Design and guide scalable microservice and plugin-based platform architecture. Provide technical leadership on architecture, code quality and delivery. Apply lottery/gaming domain knowledge and design for regulated iGaming requirements such as KYC/AML, wallets, settlement and RNG where relevant.

Design and develop Java and Python applications, lead projects, and mentor junior developers. Ensure robust application testing and support production issues.

Responsible for designing and delivering backend services in Scala, focusing on AWS cloud-native development and engineering excellence. Leads technical direction and ensures high-quality outcomes through collaboration and best practices.

Develop and maintain Java microservices for a 24/7 programmatic DOOH advertising platform. Design features, extend platform architecture, collaborate with product and engineering peers, write well-tested observable code, deploy to production using CI/CD, and support production infrastructure under a you-build-it-you-run model.

Develop complex distributed systems using Java, Kafka, and Kubernetes. Mentor team members and contribute to all phases of the product lifecycle.

Design, build, and maintain low-latency, front-to-back trading infrastructure including order management, exchange connectivity, smart order routing, internalization, and clearing. Improve scalability and performance, produce trading tools, and support diverse projects across frontend and backend technologies while collaborating with cross-functional teams.

Design, develop, and optimize a low-latency, high-throughput real-time FX options risk system. Provide architecture leadership, mentor engineers, collaborate with front-office trading and risk teams, implement stream processing solutions using Java, Kafka, Storm, and Couchbase, and ensure high availability, performance, and production reliability.

The Java Developer will design, code, and implement features for insurance policy and claims handling systems, ensuring compliance with regulatory changes. Responsibilities include testing, debugging, and collaborating with stakeholders while using a test-driven approach to software development.

The Principal Java Engineer will design and optimize low-latency payment systems, develop APIs, deploy applications on AWS, and mentor peers.

The Java Developer will create new features for policy administration and claims handling, while also integrating new systems and documenting work according to standards.

Develop, implement, and support enterprise software using Java/Spring Boot and Angular. Collaborate with product and agile teams to design, code, test, review and deploy microservices and APIs, provide production support, document artifacts, and ensure scalability, performance and adherence to architecture and best practices.

As a Senior Software Engineer, you'll solve financial problems through coding, develop distributed systems, and work collaboratively in a fast-paced environment.

Software Engineers at Zopa focus on building scalable microservices and solving financial problems, working collaboratively with various teams.

The Trading Platform Developer will design and implement functionality for a real-time trading platform, optimize systems, and troubleshoot production issues. A focus is on low-latency systems development.

Build, test, and operate cloud-native back-end services using Java (and Python), following secure coding and accessibility (WCAG) standards. Design and deploy RESTful microservices on Azure, work with SQL Server, CI/CD (GitHub Actions), write unit/integration tests, mentor junior developers, participate in agile practices and code reviews, and support service monitoring and incident fixes.

Senior Engineer accountable for owning services, improving reliability, security and observability, driving automated testing and CI/CD, leading incident response and root cause analysis, mentoring engineers, and influencing architecture and delivery practices to ensure high-quality cloud-native applications.

Own and evolve cloud-based services across the full lifecycle. Design, develop and deploy scalable microservices, drive quality via automated testing and observability, lead incident resolution, champion secure development, mentor engineers, and contribute to architecture and technical direction.

Design, build, deploy and operate scalable cloud-based full-stack applications. Own services across their lifecycle, drive quality via automated testing and observability, support incident resolution, mentor engineers, and contribute to architectural and technical decisions.