Salary: £100,000 - 110,000 per year Requirements: Proven experience working as a Java Software Engineer on large microservice architectures Active Security Clearance (SC) Strong capability building scalable RESTful APIs and backend services in Java (Spring Boot) Proficiency with Postgres (or other relational SQL databases) and solid understanding of schema design and SQL Experience with Docker, confident in containerising and deploying applications Familiarity with Test-Driven Development (JUnit & Mockito or similar testing frameworks) Hands-on experience with CI/CD using Jenkins or similar automated pipeline tooling Flexibility working in agile teams and collaborating closely with engineers, product, and design colleagues Nice to have: API Specification using Swagger/OpenAPI Nice to have: Experience with Gradle build systems Nice to have: Familiarity with Liquibase (or similar) for database versioning/migrations Nice to have: Experience with Kafka or similar event-streaming platforms Nice to have: Knowledge of React and Typescript Responsibilities: Participate in the design and implementation of large-scale microservices architecture Develop and maintain robust RESTful APIs and backend services using Java (Spring Boot) Collaborate with the team to containerise and deploy applications using Docker Write and maintain unit tests to ensure code quality through Test-Driven Development Work with the CI/CD pipeline for seamless integration and delivery Engage actively in agile ceremonies and collaborate effectively with cross-functional teams Continuously improve system performance and reliability through best practices Contribute to documentation and specification of APIs Technologies: API Backend CI/CD Docker Gradle JUnit Java Jenkins Kafka Liquibase OpenAPI React SQL Security Spring Spring Boot Swagger microservices TypeScript More: We are an instantly recognisable consultancy seeking a strong Software Engineer with Active Security Clearance (SC) to join our team in a large-scale, business-critical microservices programme. This role offers a competitive daily rate of up to £550, and can be performed in London or remotely. Join us for a 6-month engagement and be part of a collaborative team that values innovation and efficiency. last updated 9 week of 2026