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.

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

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 stakeholders

Highly 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

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

• 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