Backend Software Engineer

Backend Software Engineer

A highly respected engineering and technology business operating within the National Security space is looking for a Backend Software Engineer to join its growing team. You’ll work on meaningful, mission-critical systems that support the UK’s safety and resilience — solving complex technical challenges alongside some exceptionally bright people.

Role Overview:

• Location: Romsey, Hampshire
• Package: Competitive salary + strong benefits package including 30 days holiday plus bank holidays
• Industry: National Security / Defence Technology

What You’ll Be Doing:

• Building secure, scalable backend software for critical national security systems
• Developing features from concept through to deployment and ongoing support
• Writing clean, maintainable code with a strong focus on reliability and performance
• Designing, testing and documenting backend services and APIs
• Collaborating with engineers and technical teams to shape solutions and technical direction
• Participating in code reviews and contributing to engineering best practices
• Working with modern development tooling and deployment environments

Main Skills Needed:

• Strong backend development experience using Python
• Solid Linux knowledge and experience working in Linux environments
• Bash scripting skills
• Version control using Git
• Containerisation experience with Docker
• Understanding of software engineering best practices and secure development principles

Nice to Have:

• Experience with Kafka, Apache Pulsar or similar messaging technologies
• Exposure to CI/CD pipelines and automation tooling
• Familiarity with Agile or Scrum delivery environments
• Experience using tools such as GitLab or Atlassian products

What’s in It for You:

• Work on projects that have genuine real-world impact
• Join a collaborative, technically strong engineering environment
• Flexible working and a people-first culture
• Continuous learning and career development opportunities
• Access to excellent onsite facilities including gym and parking
• A unique working environment set within the Hampshire countryside
• Long-term career stability within a well-established engineering organisation

Please note: This role requires existing DV clearance, or eligibility to obtain it.

Think it could be a fit? We’d love to hear from you.

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

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