Software Developer jobs in United Kingdom

We are recruiting Senior Software Engineers to support a range of Defence, Cyber, and Intelligence programmes based in Gloucester. These roles offer meaningful, impactful work with strong opportunities for professional development, alongside a healthy work-life balance through flexible and hybrid working options.

You’ll contribute to the development of cutting‑edge DevSecOps software systems and applications, playing a key role in driving innovation and protecting critical digital infrastructure in the UK. Whether you specialise in a single area or operate across multiple software development disciplines with a focus on the cyber domain, your expertise will be valued and supported.

DV clearance is required to start.

If you are passionate about software engineering and ready to take the next step in your career, we would love to hear from you. Even if you don’t meet every requirement, your skills and perspective may still be a great fit – we encourage you to apply.

• Carry out software development activities under the guidance of a Software Engineering Lead.
• Design and develop tests for software debugging.
• Translate customer requirements into software features using appropriate standards, tools, and processes across the full development lifecycle.
• Identify and correct program errors.
• Prepare operating instructions and maintain clear documentation.
• Analyse system capabilities and requirements to resolve software development questions related to intent, input, output, and control mechanisms.
• Champion automation including Infrastructure as Code, CI/CD, and test automation.

• Strong proficiency in modern Java; knowledge of Python, C++, JavaScript, TypeScript, or React is a plus.
• Experience developing on Linux.
• Solid understanding of mocking and unit‑testing frameworks such as JUnit 5.
• Experience with Git version control.
• Proficient in Agile development using SCRUM.
• Experience with Oracle or other relational databases and/or MongoDB.
• Experience with GitLab CI/CD pipelines.
• Experience working with Apache NiFi.
• Familiarity with Atlassian tools including Bitbucket, Jira, and Confluence.
• Experience with Elasticsearch and Kibana.
• Experience with Hibernate.
• Experience with AWS services such as EC2, EKS, Fargate, IAM, S3, and Lambda.
• Experience building CI/CD pipelines for cloud deployments.

• Experience developing software for cloud deployment, particularly AWS.
• Experience building microservices or serverless architectures.
• Understanding challenges of migrating on‑premise workloads to cloud environments.
• Experience with JSF (PrimeFaces).

• Oracle Java Certification
• AWS Certification
• ISTQB Certification
• OSCP Certification
• CCNA Certification