Principle Software Design Engineer

TXM is recruiting on behalf of our client as their trusted recruitment partner for a Principal Software Design Engineer / Site Lead. This is a senior, hands‑on technical role combined with leadership responsibility, offering the opportunity to shape next‑generation embedded products while leading a site‑based engineering team.

This position is ideal for an experienced Embedded Software Engineer who enjoys both deep technical involvement and people leadership. You will take ownership of embedded software design and development for advanced hardware platforms, while coordinating and guiding a local engineering team to deliver high‑quality results.

• Design, develop, and maintain embedded software for ARM‑based hardware platforms, with a strong focus on real‑time operating systems (RTOS), ideally Zephyr.
• Lead and coordinate a site‑based engineering team, including task allocation, workload prioritisation, and day‑to‑day technical oversight.
• Develop, debug, and maintain high‑quality embedded C code, following best practices and coding standards (e.g. MISRA where appropriate).
• Implement and optimise wireless communication protocols such as Bluetooth, Wi‑Fi, Zigbee, or similar technologies.
• Collaborate closely with hardware engineers and other stakeholders to define requirements, architecture, and system design.
• Support development of user interfaces or related applications using web‑based technologies such as JavaScript and HTML.
• Develop Linux‑based applications for testing and simulation purposes.
• Produce and maintain clear technical documentation covering design, implementation, testing, and troubleshooting.
• Promote secure software development practices, including encryption and secure communication.
• Stay up to date with emerging technologies and industry best practices to drive continuous improvement and innovation.

• Strong commercial experience programming in C within RTOS environments (Zephyr, FreeRTOS, or similar).
• Proven background in embedded software development for real‑time, hardware‑integrated systems.
• Experience with wireless communication protocols and connectivity technologies.
• Working knowledge of JavaScript and HTML.
• Experience with Linux OS application development for testing or simulation.
• Familiarity with embedded development tools, IDEs, and version control systems such as Git.
• Demonstrated leadership experience, with the ability to manage workloads and motivate engineering teams.
• Strong analytical and problem‑solving skills, with the ability to work autonomously on complex systems.

• Bachelors degree in Computer Science, Electronic Engineering, or a related discipline (or equivalent experience).
• 5+ years experience in embedded software engineering.
• Experience with in consumer electronics, IoT, or similar embedded product environments is advantageous.

• Senior, influential role combining technical leadership and people management.
• Opportunity to work on innovative, next‑generation embedded products.
• Long‑term, permanent position within a stable and forward‑thinking engineering environment.

If you are interested and would like to hear more about this role, please apply right away!