Embedded Firmware Engineer

Location: Cambridge (Hybrid 1 day in the office a week) Salary: £60,000 - £70,000 + Excellent Benefits Contact: Adam Mayne - (url removed) - (phone number removed), An exciting opportunity has arisen for an experienced Firmware / Embedded Software Engineer to join a rapidly growing technology company developing next-generation IoT, Bluetooth-enabled, low-power wearable devices. You’ll be part of a talented, supportive R&D team working on real products with real users, contributing to both current-generation firmware and new product development from concept through to mass production. This is an environment known for innovation, employee development, and a genuinely collaborative culture, offering excellent training, career growth and the chance to work with cutting-edge embedded technologies.

Responsibilities of Firmware Engineer

• Designing and developing embedded firmware for IoT wearable products
• Working across the full product lifecycle - prototyping, implementation, optimisation, validation and release
• Creating efficient, reliable firmware for battery-powered, resource-constrained devices
• Developing and maintaining low-level drivers, communication interfaces and wireless protocol stacks
• Collaboration with hardware, electronics and software teams to deliver high-quality, production-ready systems

• Degree/Masters/PhD in Computer Science, Electronics, Embedded Systems or similar
• Strong commercial experience in embedded C development (ideally 5+ years)
• Experience with RTOS environments such as FreeRTOS, Zephyr, ThreadX or similar
• Confident working in Unix/Linux development environments
• Strong grounding in software testing (unit, regression, system)

Embedded & Firmware Expertise

• Experience writing device drivers directly from datasheets
• Knowledge of low-power design techniques and firmware optimisation for constrained MCUs
• Experience working with BLE/Bluetooth, WiFi, Cellular or other wireless protocols
• Experience with battery-powered, low-energy devices is highly beneficial
• Familiarity with Git, Jira, Bitbucket, or similar tooling

Nice to Have

• Prior experience with wearable technologies
• Cellular expertise (e.g., LTE-M, NB-IoT)
• Exposure to embedded Linux environments