Top Java Developer Jobs in London

Join the Bridge front office team to re-engineer and maintain an MT4/MT5/FIX bridge. Build robust backend systems in Java, design APIs, debug across the stack, support production on a rota, and contribute to front-end usability. Work collaboratively in a small, agile London-based team.

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

Design, develop, and maintain cloud-based applications; provide technical leadership; manage junior team members; engage in agile project management.

The role involves diagnosing and resolving production incidents, developing fixes in Java, collaborating with teams, and improving system reliability while managing documentation and monitoring performance.

Develop and maintain FIX APIs for IG Prime, enhance API capabilities, monitor performance, and support clients while collaborating with stakeholders.

Lead an application development team to build and evolve next-generation trading applications, focusing on microservices and automation in finance.

Senior Java engineer to re-architect backend financial data mapping into scalable, testable ETL pipelines. Build and maintain Java-based microservices and Apache Beam pipelines, optimise cloud infrastructure via IaC and CI/CD, work with large datasets, ensure accuracy and observability, collaborate across product, QA and operations, and mentor peers.

Design, build, and maintain high-performance Java backend systems that integrate and deploy AI/ML models. Develop RESTful microservices, optimize performance and security, implement CI/CD, work with cloud platforms and container orchestration, and collaborate with data scientists on scalable ML solutions.

Seeking a backend engineer to enhance user experiences and lead product decisions for an ad server platform. Responsibilities include developing features, collaborating with teams, ensuring code quality, driving improvements, and supporting production environments.

As a Full Stack Engineer, you will handle the full development lifecycle, engage with stakeholders, and promote best practices in engineering.

The FX Risk Java Developer (VP) will develop high-performance Java applications for global banking, focusing on risk calculations and resilient systems. Responsibilities include designing data structures, implementing algorithms, and supporting projects in a front office environment.

The role involves the technical implementation of FX trading systems, collaboration with teams, system architecture design, and enhancing deliverable quality. Candidates should have experience with FX, ultra low-latency development, and strong communication skills.

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 Lead Java Developer, manage applications development teams, communicate project progress, provide technical oversight, and shape future product direction while ensuring compliance and stakeholder management.

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

Seeking a skilled Java Developer with SC Clearance to design and maintain back-end systems, utilizing AWS and deploying applications using Kubernetes. Collaborate on CI/CD pipelines and develop basic front-end applications with React.

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.

Design, build and maintain backend microservices using Java 17+, Spring Boot and related stack. Integrate third-party platforms, ensure performance and scalability, own technical decisions end-to-end, balance feature work with technical debt, and mentor junior engineers.

Senior full-stack Java engineer responsible for designing, building, and maintaining scalable microservice-based back ends and responsive front ends (React/Angular). Integrate AI developer tools, enforce code quality, review architecture, drive delivery, mentor junior engineers, and ensure compliance and security in enterprise-grade distributed systems.

The Java Developer will design, build, and optimize medical services, collaborating with product owners and employing best software practices. Involvement with cloud technologies and integration testing is expected, alongside maintaining and enhancing existing services in a microservices architecture.

Design, develop, and maintain scalable Java backend systems and microservices powering card payments, treasury management, transactions, and crypto liquidity. Build REST APIs, apply TDD and DDD, ensure maintainability, and deliver via CI/CD processes while collaborating with product and engineering teams.

Lead technical delivery for a high-profile, cloud-native advertising and audience insights platform. Hands-on coding in Java and React, design scalable AWS-based microservices, mentor distributed teams, own CI/CD and architecture decisions, and collaborate with product and senior stakeholders.

Design, develop and maintain backend services and RESTful APIs using Java and Spring Boot. Deliver cloud-native deployments on OpenShift/RHEL, ensure secure coding and API compliance, implement CI/CD pipelines, participate in code reviews, and collaborate with product and engineering teams to support loyalty and rewards platform performance and operations.

The Full Stack Engineer will develop and manage software solutions to enhance trading workflows, collaborating with business stakeholders, and ensuring high-quality code and continuous delivery.