Principal Software Engineer - Verification

Shape how safety-critical software is verified at the highest level.

We're partnering with a growing, highly respected engineering SME specialising in safety-critical embedded systems. They are looking for a Principal Software Engineer to play a key role in developing and assuring high-integrity embedded software, including a safety-certified real-time operating system.

This is a hands-on software engineering role within the verification team, combining technical leadership with deep involvement in verification, validation, and certification activities.

The Role

You'll operate as a senior technical authority while remaining close to the code. Responsibilities include:

Leading verification strategy and approach for embedded software systems
Designing, developing, and maintaining test frameworks, tools, and automation
Performing low-level software verification across multiple architectures
Contributing directly to code-level activities (primarily C / embedded environments)
Driving verification activities across the full software lifecycle
Supporting certification to standards such as IEC 61508, DO-178C, ISO 26262
Mentoring engineers and setting best practices within the verification team
Working closely with customers to provide technical guidance and support

What We're Looking For

Essential:

Degree in Engineering, Computer Science, Maths or similar
Experience with Real-Time Operating Systems (e.g. FreeRTOS, SafeRTOS or similar)
Strong background in embedded software engineering (C)
Significant experience in software verification / validation
Experience developing test tools, frameworks, or automation
Understanding of low-level / hardware-near software behaviour
Experience working in a controlled or safety-critical environment
Degree in Engineering, Computer Science, Maths or similar
Strong communication skills and ability to engage with stakeholdersHighly Desirable:

Knowledge of safety standards (IEC 61508, DO-178C, ISO 26262, IEC 62304)
Experience with ARM architectures (Cortex M / A) or similar
Understanding of debugging at processor level
Knowledge of software lifecycle, requirements, and configuration management
Exposure to networking, multicore systems, or embedded security

Working Environment

Bristol-based
Hybrid working (minimum 3 days onsite; more during onboarding)
Collaborative, engineering-led environment with strong technical depth

Package & Benefits

Competitive salary with annual review
Performance-related bonus
Generous pension contribution
Private healthcare, income protection & life assurance
25+ days holiday (increasing with service)
Flexible working hours
Ongoing professional development and training