Top Java Developer Jobs in London

Lead the architecture and delivery of the PACE platform, mentor engineers, manage production operations, and collaborate with stakeholders in alternative investments.

Lead design and hands-on development of scalable, fault-tolerant portfolio management and multi-asset trading systems. Own project priorities, deliver high-throughput distributed applications, mentor engineers, partner with product and business stakeholders, and apply strong architecture, concurrent programming, and data expertise.

Early-career backend developer working on high-performance Java services for a programmatic advertising matching engine. Contribute code, tests, and operational support for real-time cloud services, pair with senior engineers, participate in reviews, and learn deployment and observability practices.

Lead the development of scalable cloud-native solutions using AWS and Java. Provide technical leadership, mentoring, and manage high-complexity projects in agile environments.

Develop and modernize microservices using Java and Spring, build REST/GraphQL APIs, contribute to CI/CD, run services on Kubernetes (EKS), support monitoring with Prometheus/Grafana, collaborate with cross-functional teams, and use AI tools to improve delivery and code quality.

The Fullstack Java Developer will design and build dynamic applications, focusing on front end and backend development using Java, Spring Boot, and cloud-native technologies, while ensuring best practices in code quality.

Lead a Scrum team to design, develop, test and support scalable Java-based applications critical to SwapClear clearing operations. Drive high-quality code (Java 17+, Spring), contribute to frontend and cloud/container deployments, implement test automation, participate in production support (including rota), and document system designs while collaborating across business and CI teams.

As a Principal Backend Engineer, you will build scalable backend services with Java, design APIs, implement microservices, and work with AWS cloud technologies.

The Senior Software Engineer II will develop and enhance investment products, focusing on user experience and cross-team collaboration, while implementing clean code practices.

The Senior C++ / Java Developer designs, develops, and maintains software solutions, collaborating with teams to enhance platform stability and scalability, while mentoring junior engineers and ensuring high coding standards.

The Lead C++ / Java Developer is responsible for designing and maintaining low-latency FX market infrastructure, ensuring high availability and resiliency. This role emphasizes technical leadership and collaboration across teams to deliver robust solutions and improve system performance.

You will shape a new investment product by defining its technical foundations, implementing features, and collaborating across teams to enhance user experience with financial management.

The Java Developer designs, develops, and maintains application systems at Citi, focusing on Java and related technologies while collaborating with tech teams to deliver high-quality software solutions.

Design and develop high-performance Java applications for real-time trading and risk systems, optimizing performance and providing production support.

Develop tooling for Citi's developer community using Java and SpringBoot. Engage in all SDLC phases and serve as a trusted consultant, enhancing developer experience and fostering continuous learning.

The role involves designing and building cloud-native applications using Java and Spring Boot, focusing on scalable microservices for financial institutions while leading agile practices.

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.

As the FX Risk Lead Java Developer, you will design and develop Java microservices, optimize data solutions, implement real-time data processing, and ensure application scalability and reliability. You will collaborate with DevOps, conduct code reviews, and document system architecture.

Build and maintain full-stack trading tools for systematic and credit portfolio trading. Collaborate with traders, quants, and product to define requirements, implement features (portfolio optimization, P&L analysis, recommendations), ensure production stability, and enable rapid, trader-friendly tooling using Java, Python, React, containerized deployments, and CI/CD.

As a Senior Software Engineer II, you will drive the technical vision for backend solutions, enhance recipient management, and ensure system reliability.

As a Java Developer, you'll develop features, collaborate with teams, and contribute to CI/CD pipelines, while leveraging AI tools for high-quality software.

Design, implement and maintain FX e-trading systems with emphasis on ultra low-latency performance. Collaborate with trading and quant teams to define architecture, troubleshoot systems (software, hardware, networks), replace or renovate legacy platforms, document procedures, and drive best practices across teams.

As a Backend Engineer, you'll enhance accounting integrations, improve workflows, expand global offerings, and build a scalable platform architecture.

The Java Developer will engineer Trading applications, resolve complex business problems, provide application expertise, and mentor mid-level developers while working in an agile environment.

The role involves developing and maintaining trading and cash management systems using Java 21, focusing on microservices and cloud technologies, with collaboration across business functions.