Software EngineerLocation: CheltenhamBusiness Unit: Central Government, Law Enforcement and National SecurityLevel: Mid-SeniorEmployment Type: PermanentClearance: Must hold active UK Security ClearanceAbout the OpportunityWe are partnering with a leading Engineering business 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 AI/DS, 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 DoingDesigning, developing, and maintaining secure, scalable Java applications and microservices using Spring Boot.Translating technical designs into clean, test-driven, production-ready code aligned with engineering best practices.Building and maintaining RESTful APIs and integrating them with databases, messaging systems, and external services.Supporting and evolving core architectural components, ensuring performance, reliability, and scalability.Collaborating with product, architecture, and engineering teams to deliver solutions aligned with user and business needs.Participating in Agile ceremonies a