Senior Software Engineer - Stevenage

Technical Engineering
Ref: 9808 Date Posted: Thursday 26 Feb 2026
Senior Test Software Engineer
 
Based on site in Stevenage
 
Salary from £45,000 - £75,000 DOE + Bonus + 14% Pension + Paid Overtime
 
The software you write won’t sit behind a login screen.
 
It will configure, verify and validate complex defence systems. It will be used in development, production and field environments. It has to work. Every time.
 
You’ll join a multi-disciplined engineering team building high-reliability test solutions that sit between hardware and mission-critical systems. This isn’t feature development. It’s engineering with consequence.
 
You’ll be:
  • Writing robust software in C, C++ or ADA
  • Developing high-performance test applications integrated with real hardware
  • Working closely with Systems, Electronics and Test teams
  • Solving problems that don’t stop neatly at the edge of “software”
If you enjoy writing clean, documented, dependable code and you like understanding how the whole system works, not just your module, you’ll fit well here.
 
What you'll bring:
  • Strong C, C++ or ADA experience
  • Analytical thinking
  • Comfort working in safety or mission-critical environments
  • British citizenship or Dual national with British citizenship for security clearance
This is engineering that directly supports national capability.

If you want your work to mean something, let’s talk.