Top Java Developer Jobs in London

As a Full Stack Engineer, you will design and develop software solutions for trader efficiency, collaborate with stakeholders, ensure code quality, mentor junior developers, and manage full software lifecycle in a DevOps-focused environment.

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.

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.

Senior backend engineer for Engine by Starling's SaaS banking platform. Build and maintain backend services and internal tooling, design configurable features, ensure automated testing and continuous deployment, collaborate across teams, mentor colleagues, and lead projects or domains to deliver production-ready solutions.

As a Senior Software Engineer, you'll develop high-quality software solutions, mentor junior members, apply best practices in design and build, and contribute to technical decisions in a collaborative environment.

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.

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

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.

Develop and maintain scalable Java microservices powering Rightmove's iOS and Android apps. Design APIs, troubleshoot production issues, apply TDD and automated testing, collaborate with product, design, and data, and improve performance, reliability and system architecture.

Hands-on senior Java engineer to modernise legacy services using AI, implement MCP servers, build AI-assisted CI/CD and developer tooling, and ship production microservices with measurable productivity and performance improvements.

Lead design and delivery of Java-based, cloud-deployed services. Mentor developers, drive adoption of modern practices (DevOps, CI/CD, TDD/BDD), build event-driven systems, and shape technical roadmap.

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.