Backend Software Developer

Company: Copello
Apply for the Backend Software Developer
Location: Romsey
Job Description:

Overview

In this Backend Software Engineer role you will deliver mission-critical software for defence and security, focusing on robust backend services. You’ll translate designs into production-ready code and contribute to reviews and architectural decisions. You’ll work within cross-functional teams to build, test, and document scalable backend systems using modern patterns. This is a hands-on position with real impact on national security and reliability in demanding environments.

Responsibilities

  • Write clean, secure, maintainable backend code
  • Translate designs into working software from concept to production
  • Contribute to code reviews and shared technical decisions
  • Design, build, test and document robust backend services
  • Apply appropriate patterns using proven and emerging technologies

Key requirements

  • Python
  • Linux
  • Bash scripting
  • Git
  • Docker
  • Messaging or streaming technologies (e.g. Kafka or Apache Pulsar)
  • Experience working in Agile/Scrum teams
  • Tooling such as Atlassian or GitLab
  • Exposure to CI/CD pipelines
  • DV clearance (must have)
  • agile experience
  • team collaboration
  • problem solving
  • Python
  • Linux
  • Bash scripting

Posted: September 14th, 2026