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Backend Software Engineer

Company

Copello

Location

Southampton, Hampshire

Posted

July 09, 2026

Position Overview

Backend Software Engineer - National Security

**PLEASE NOTE: Applicants MUST already hold DV Clearance to be considered

Romsey based

Copello are working with a leading technology and engineering company supporting customers across defence and security, delivering systems that operate in the most demanding and sensitive environments. As a Backend Software Engineer, you’ll help deliver mission- critical software to keep the UK safe, secure and prosperous. You’ll work on the feature development and maintenance of critical systems, solving complex, real-world problems

Responsibilities

* Write clean, secure and 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

Skills and Experience

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