Java Software Engineer Location: London Business Unit: Central Government, Law Enforcement and National Security Level: Mid-Senior Employment Type: Permanent Clearance: Must hold active UK Security Clearance About the Opportunity We are partnering with several businesses seeking experienced Java Software Engineers to help deliver mission-critical capabilities that protect the UK’s security and prosperity. You will work at the intersection of advanced engineering and real-world problem-solving, developing cutting-edge products that counter evolving threats. Our teams work with leading technologies across Software Application, Cyber, Cloud, DevOps/SRE, and Platform Engineering, supporting customers across the National Security, Defence and Intelligence community. With long-term programmes secured, this is an opportunity to join a high-growth environment with genuine impact. What You’ll Be Doing Designing, developing, and delivering secure, high-quality software solutions. Producing clean, test-driven code and ensuring adherence to engineering best practice. Translating logical designs into physical implementations and producing detailed designs. Integrating UI/API components with existing data stores and services. Maintaining and enhancing architectural elements such as data ingest pipelines, data stores and REST APIs. Collaborating with user researchers, product teams, and customers to align solutions with real user needs. Participating fully in Agile ceremonies: sprint planning, daily stand-ups, demos, and backlog refinement. Contributing to technical strategy, innovation, and tactical upskilling across emerging technologies. Key Skills & Experience Strong commercial experience with Spring Boot and Java Enterprise development. Front-end proficiency with React, Vue.js, or AngularJS. Experience with modern testing frameworks and TDD. Ability to work across UI, API, and data layers. Technically curious and willing to adopt emerging tools and approaches. Strong documentation and design discipline. Why Join? You’ll be part of a trusted engineering organisation with over 60 years of heritage in sensors, communications, cyber, AI and ML. They solve complex challenges that make a tangible difference protecting people, platforms and missions, today and for the future.