Senior Test Software Engineer — Defence Systems (C/C++)

Cirrus Selection; Stevenage; On-site; GBP 45,000 - 75,000; Full time

Benefits offered by this job

Bonus

Pension 14%

Paid overtime

Job summary

Cirrus Selection in Stevenage is seeking a Senior Test Software Engineer to join an on-site engineering team. You will write robust C/C++ software that configures, verifies and validates complex defence systems used in development, production and field environments.

This role emphasizes system-level understanding and practical problem solving, not just software. You’ll collaborate with Systems, Electronics and Test teams to deliver high-performance test applications and automation in safety- or

Qualifications

• Proven strong C/C++ development experience.
• Experience building test software that interacts with hardware.
• Knowledge of automation, CI and DevOps.
• Experience with electronics measurement tools (oscilloscopes, spectrum analyzers).
• Ability to think analytically and work safely in mission-critical environments.
• Eligibility for security clearance (British citizenship or dual nationality).

Responsibilities

• Write robust C/C++ software for test solutions.
• Develop high-performance test applications integrated with real hardware.
• Collaborate with Systems, Electronics and Test teams.
• Solve cross-domain issues beyond pure software boundaries.

Skills

Strong C/C++ experience

Test software development

Automation/CI/DevOps

Electronics measurement and debug

Analytical thinking

Safety/mission-critical

Security clearance eligibility

Tools

Oscilloscopes

Spectrum analyzers

Job description

Cirrus Selection in Stevenage is seeking a Senior Test Software Engineer to join an on-site engineering team. You will write robust C/C++ software that configures, verifies and validates complex defence systems used in development, production and field environments.

This role emphasizes system-level understanding and practical problem solving, not just software. You’ll collaborate with Systems, Electronics and Test teams to deliver high-performance test applications and automation in safety- or