Job Description

We are currently looking for a Firmware Engineer to join a Medical Device project on an initial 4/5 month contract;

What you will do

Take ownership of the firmware architecture, state-machine design and safety logic from the outgoing internal engineer

Design and implement robust state-machine control covering the full sample collection workflow

Build in fault detection and safe-shutdown behaviour for identified failure modes

Implement event logging, self-test on power-up, and battery management firmware

Move the device from current design to button-driven embedded operation (MVP), then to a fully verified release for tech transfer to CMO

Produce firmware in compliance with IEC 62304: software development plan, requirements, architecture, unit and integration tests, traceability and release notes

Define and run hardware-in-loop verification of safety-critical paths

Support tech transfer of firmware version records, source code and build environment to client's chosen CMO

Operate inside of ISO 13485 QMS with formal change control from the alpha prototype build onwards

Essential skills and experience

Medical-device embedded firmware. Production firmware delivered under IEC 62304, ideally on Class II / IIa/ III devices, with the lifecycle artefacts to evidence it.

Embedded safety firmware. Demonstrable experience with robust state-machine control, fault detection and safe shutdown, brown-out and reset handling, sequencing, event logging, and power-on self-test.

Bare-metal or RTOS C / C++ on ARM Cortex-M. Comfortable on STM32, nRF, or similar low-power MCUs. Bootloader and secure-update experience useful.

Low-power firmware design. Battery-conscious scheduling, peripheral power gating, sleep-mode strategies for wear cycle plus recharging.

Sensor and actuator interfacing.

Verification mindset. Unit test harnesses, hardware-in-loop test rigs, traceable verification of safety-critical paths, evidence captured to Design History File (DHF) standard.

Guidant, Carbon60, Lorien & SRG - The Impellam Group Portfolio are acting as an Employment Business in relation to this vacancy