Senior Software Engineer — Hybrid, Mission-Critical Security

Company: MI5
Apply for the Senior Software Engineer — Hybrid, Mission-Critical Security
Location: Manchester
Job Description:

GCHQ, the UK intelligence agency, is seeking a Senior Software Engineer in Cheltenham or Manchester to help design and deliver mission-critical software. You will contribute to architecture, code quality, and DevOps practices, with a focus on scalable, secure systems.

Candidates should have strong skills in C++, Golang, Python, Rust, and cloud platforms (AWS/Azure/GCP), plus experience leading Agile teams and mentoring others. The role offers hybrid working and a competitive salary with benefits.

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Posted: September 26th, 2026