Firmware Engineer

My client is a fast-scaling, cutting-edge, deep tech semiconductor company, founded in 2022, and they are looking for an experienced Firmware Engineer to join the team. The team consists of around 20 workers, in the London office, who are both ambitious and thrive in a fast-paced environment, ready to welcome like minded people into their team! What’s in it for you? High-stakes customer base: defence, government, and critical infrastructure work with real-world impact. Long-term ambition to IPO — a genuine company-building opportunity.

Fast growth — headcount set to double in 6–9 months, real scope for early/senior joiners to grow with the company. Genuinely differentiated technology — hardware-rooted, quantum-safe security, not just another software security layer. The role:
In this role, you'll be instrumental in developing robust and secure firmware solutions for revolutionary products. You'll work across the entire development lifecycle, from pre-silicon validation to post-silicon bring-up, ensuring the highest standards of quality and security.

Day to Day

Design, develop, and debug firmware for ARM Cortex-M based microcontrollers and their associated peripherals. Implement and execute comprehensive unit testing strategies to ensure code quality and reliability. Actively participate in both pre-silicon and post-silicon validation and bring-up activities. Collaborate closely with hardware and architecture teams to define specifications, troubleshoot issues, and optimize performance. Contribute to the design and implementation of secure firmware features, including secure boot mechanisms.

Develop high-quality, well-documented APIs and maintain strong design principles throughout the firmware development process. Work effectively within a collaborative team environment, sharing knowledge and best practices. Develop and integrate IoT/networking stacks for connected devices.

Requirements

Bachelor's or master’s degree in electrical engineering, Computer Engineering, Computer Science, or a related field.
5+ years of experience in firmware development, with a strong focus on embedded systems.
Proven expertise with ARM Cortex-M processors and their peripherals.
Demonstrable experience with firmware unit testing and involvement in pre-silicon and post-silicon development phases.
Solid understanding of good API and design skills for robust and maintainable code.
Experience with IoT/networking stacks (e.g., TCP/IP, Bluetooth, Wi-Fi, Matter, Thread).
Excellent collaboration and communication skills, with a track record of working effectively with hardware, architecture, and cross-functional teams.

Interview Process

5 stages – Screening call, Tech Screening Call, Tech Assessment, call with Chief of Staff, finally a call with the CTO.
How to apply: If you are interested, please email with your updated CV and a time that’s best to call you or call me on .
Please note that sponsorship isn’t available.