Salary: £65,000 - 65,000 per year Requirements: Significant commercial experience developing firmware for STM32 or ARM Cortex-M microcontrollers Strong expertise in embedded C and C++ Proven experience with custom PCB bring-up and fault diagnosis Deep understanding of microcontroller peripherals and low-level operation Confident use of JTAG / SWD debugging tools (e.g. ST-Link, J-Link) Ability to work independently, exercise sound engineering judgement, and handle sensitive technical information appropriately Responsibilities: Lead the development of embedded firmware for STM32-based platforms Design and maintain robust firmware architectures for long-lived systems Develop secure, efficient firmware in C Perform board bring-up and low-level debugging on custom PCBs Debug complex issues using JTAG / SWD and other low-level diagnostic tools Work closely with hardware engineers to ensure secure and reliable hardware/firmware integration Review code and contribute to engineering standards and best practices Support system verification, validation, and controlled deployment Produce clear technical documentation appropriate for secure environments Technologies: ARM Embedded Firmware Hardware Support C++ More: We are Melbreck Technical, a leading designer and manufacturer of specialist equipment based in the Northwest, with facilities including one in Lancaster. We are looking for a Senior PCB Firmware Developer to play a key technical role in the development of secure embedded systems based on STM32 microcontrollers. This permanent senior position offers a competitive salary of £65,000, an opportunity to work on discreet, high-impact embedded systems, and influence secure firmware architecture and engineering standards within our small, trusted engineering team. last updated 20 week of 2026