Java Software Engineer (SC Cleared)

Java Software Engineer

Location: Cheltenham

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 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 Doing

• Designing, 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 and contributing to technical strategy, continuous improvement, and innovation.

Key Skills & Experience

• Strong commercial experience with Java and Spring Boot in enterprise or microservices environments.
• Solid understanding of RESTful API design, service-oriented architectures, and integration patterns.
• Experience with relational and/or NoSQL databases and ORM frameworks such as JPA/Hibernate.
• Proficiency with automated testing frameworks and Test-Driven Development (TDD).
• Familiarity with Maven or Gradle and working across application, service, and data layers.
• Strong documentation and design discipline, with a curiosity for emerging Java and backend technologies.

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.