Real-Time Systems Software Engineer

Cirrus Selection
Sg12Da, SG1 2DA, United Kingdom
Last month
£55,000 – £65,000 pa
Applications closed

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Salary

£55,000 – £65,000 pa

Job Type
Permanent
Work Pattern
Full-time
Work Location
On-site
Seniority
Mid
Education
Degree
Security Clearance
Required
Posted
19 May 2026 (Last month)

Benefits

Up to £2,500 bonus 14% pension Flexi leave Paid overtime

Real-Time Systems Software Engineer

Based in Stevenage

Salary up to £65k

Some software engineering roles are comfortable. Familiar stack, predictable problems, another sprint planning meeting.

This isn't one of those.

You'll be writing C++ on Linux, working with high-speed SFPDP data pipelines and multi-threaded architectures that feed directly into the validation of some of the most advanced defence systems in the world. Real hardware. Real consequences. The kind of work that actually matters.

The team is small and experienced. No passengers. You'll own problems, make decisions, and see the results of your work in systems that get used.

What the role needs from you is straightforward: solid C++ and Linux, genuine experience with real-time data systems and concurrent programming, and the instinct to go deep when something isn't working. SFPDP experience is a bonus, not a dealbreaker.

You'll need to be eligible for UK Security Clearance and comfortable being based full-time on-site in Stevenage. The package includes: up to £2,500 bonus, 14% pension, flexi leave, and paid overtime.

If you've been building real-time systems and you want the work to mean something, this is worth a conversation.

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