Simulation Software Engineer

C# Real-Time Simulation Engineer (Defence Systems)
Bristol | Hybrid (2–3 days onsite) | Sole British nationals only

Before you apply - This is not a general software or web development role.
We are not looking for candidates whose experience is primarily in:

• Web / backend (.NET APIs, enterprise systems)
• Mobile or front-end development
• Data analytics without real-time systems experience

The role (what you’ll actually be doing) You will develop real-time, performance-critical simulation software used to model complex defence systems (e.g. missile systems, sensors, and system interactions).
Your work will:

• Run under real-time constraints where timing and determinism matter
• Interface with hardware-in-the-loop rigs and test environments
• Support verification, validation, and demonstration of physical systems
• Contribute to distributed simulation environments used across engineering teams

What you’ll need

• Strong C# software engineering experience in a real-time or performance-sensitive context
  (not typical enterprise/web applications)
• Experience with real-time systems, simulation, or systems modelling
• Solid understanding of:
  • Multithreading / concurrency
  • Performance optimisation
  • Software design for deterministic systems
• Experience working in:
  • Agile environments
  • Test-driven development / unit testing
  • CI/CD pipelines

Ideal backgrounds (highly relevant) We are particularly interested in candidates from:

• Defence, aerospace, or robotics
• Real-time / embedded systems engineering
• Simulation or modelling of physical systems
• Game engine development (Unity/Unreal) with a strong systems/programming focus
• High-performance or low-latency software development

Due to security classification, this role is only open to sole British nationals.

What you’ll get

• Bonus up to £2,500
• Pension matched up to 14%
• Paid overtime opportunities
• Onsite facilities (subsidised meals, free parking)
• Enhanced parental leave (up to 26 weeks)

Why this role is different
This is an opportunity to work on engineering-grade software, not business systems. Your code directly contributes to real-world system behaviour, testing, and validation of advanced defence technology.

Next step
Share your profile for a confidential discussion with a specialist technical recruiter.

Thank you for your interest. If you do not hear from us within seven working days, please presume your application has been unsuccessful on this occasion. You may resubmit your CV or details in the future, and we shall assess your suitability then.