Back End Developer

Senior Java Engineer – Contract (London, Hybrid)

We’re looking for a Senior Java Engineer to join a well-established engineering team and help build large-scale, highly available platforms serving a wide user base. This is a 6-month contract, hybrid working (2 days per week on site in London), with a day rate up to £650, inside IR35.

What you’ll do

• Design and develop scalable backend applications using Java 21
• Build microservices with Spring Boot and related frameworks
• Work with PostGres databases and maintain REST APIs
• Implement event-driven integrations and robust backend services
• Apply Test Driven Development (TDD), with focus on code quality and unit testing
• Collaborate with DevOps, QA, and Product teams to deliver reliable solutions
• Deploy and manage services in AWS using Lambda, ECS, S3, CloudFormation, and Kubernetes

About you

• Strong commercial experience in Java and Spring Boot
• Proven experience building and supporting microservices architectures
• Hands-on experience with PostGres
• Familiar with cloud environments, preferably AWS
• Experience with Kubernetes and containerised applications
• Knowledge of CI/CD pipelines and automated deployments
• Solid understanding of TDD and modern testing practices
• Comfortable working in Agile teams with a hybrid setup
• Clear communicator and team player

This is a fantastic opportunity for a contract Java Engineer to work in a modern, cloud-focused engineering environment.