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.