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Arrows Group
Back End Developer

Back End Developer

Hybrid

London, United kingdom

Freelance

20-01-2026

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Skills

Java CI/CD DevOps Kubernetes Test Databases AWS Agile Spring Spring Boot CI/CD Pipelines PostGres Microservices

Job Specifications

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.