Top Java Developer Jobs in London

Senior Java Developer for the Structured Rates desk: design, build and support scalable distributed risk-management systems across the full SDLC. Partner with product, middleware and infrastructure teams, support production releases, implement CI/CD and testing, and leverage distributed caches and grid-computing technologies to enable trading and risk workflows.

Collaborate with teams to design, develop, and deploy applications for scientific research. Enhance delivery processes and implement Agile practices.

The Java Software Engineer will develop robust and scalable code for customer services using Java, AWS, and Postgres, while advocating for clean coding and best practices.

The Senior Java Engineer will lead the technical architecture and development of the Equinox data platform, ensuring robust solutions, mentoring junior team members, and improving system efficiency and operational risk.

Design, develop, and maintain secure applications using Node.js and other technologies, focusing on building REST APIs, microservices, and contributing to government projects.

The role involves hands-on development in Java/Kotlin, contributing to an agile team, implementing CI/CD, collaborating with analysts, and maintaining documentation and support. Mentorship of juniors is also expected.

Design, develop, and maintain scalable backend systems and microservices for payments, treasury, transactions, and crypto. Build REST APIs, improve existing systems, and deliver high-quality code using Spring Boot, Java, Postgres, TDD, DDD, and CI/CD. Collaborate across teams to drive product development and operational reliability.

As a Senior Software Engineer, you'll develop RESTful Java APIs, integrate third-party APIs, collaborate with the project team, identify bottlenecks, and mentor team members.

Lead design, development, testing and deployment of counterparty credit risk applications. Provide technical leadership, enforce architectural and coding standards, modernize large-scale systems, collaborate with global teams, mentor junior engineers, and build performant solutions processing millions of records for risk and capital calculations.

Design, develop and implement microservice-based components for a derivatives exchange trading platform. Collaborate with product, security, and DevOps teams to build secure, scalable back-end services, implement automated testing, CI/CD, participate in code audits, and resolve cross-stack infrastructure issues.

The Senior Software Engineer will develop Java APIs, collaborate with teams to deliver products, mentor staff, and improve software delivery processes.

The role focuses on modernizing legacy services using AI, improving delivery speed, and building AI-powered development infrastructure. Responsibilities include coding, implementing CI/CD pipelines, and training teams on AI workflows.

The Senior Java Software Engineer will build and maintain payment integration systems, ensuring stability and accuracy while delivering robust scalable solutions in a fast-paced environment.

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

Senior individual-contributor responsible for hands-on implementation, performance, scalability, resilience, and operational excellence of a Java/AWS-based Risk Screening platform. Partners with architects and SREs, leads complex changes, optimises large databases, and mentors engineering teams to ensure reliable, high-performance production systems.

Responsible for platform development and management, collaborating with stakeholders for requirements, and maintaining code quality by mentoring juniors and performing code reviews.

Build and maintain scalable graph-based search services using Java and Spring Boot. Design GraphQL and REST APIs, integrate with databases and AWS services, ensure monitoring and reliability, mentor engineers, and collaborate with product teams to deliver advanced search and recommendation features.

Implement and migrate core backend systems to Java Spring Boot on GCP. Develop and optimize connectors for marketplaces and social/quick-commerce, rebuild catalog publication flows, migrate legacy business logic into new services, and ensure real-time, accurate stock and price synchronization. Work with PostgreSQL, Redis/Valkey, REST and event-driven architectures running on Kubernetes.

As a Senior Software Engineer, you'll maintain critical data framework integrations, ensuring performance and reliability while collaborating with the community, affecting real-time analytics and observability systems.

Design and develop scalable applications and services, translating business requirements into technical solutions while ensuring code quality and performance. Collaborate within an Agile team, participate in code reviews, and mentor junior developers.

Lead the design and development of full-stack solutions, mentor engineers, and ensure high-quality, scalable applications across frontend and backend platforms.

Join as a Senior Java Engineer to develop scalable Java applications, utilizing frameworks like Spring and CI/CD practices. Engage in a talent community before roles open, emphasizing Java proficiency and distributed systems knowledge.

As a Front-End Developer, you will design and develop web interfaces, collaborate with teams, mentor juniors, and ensure adherence to coding standards and best practices.

Lead the design, development, and deployment of software applications, providing technical leadership and collaborating with cross-functional teams to meet project goals.

The role involves rapid application development for trading software, collaborating with traders, providing support, and managing data.