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# Embedded Firmware Engineer

- **Company:** KO2 Embedded Recruitment Solutions Ltd
- **Location:** UK (Remote available)
- **Experience:** Expert
- **Salary:** £80,000.0 - £85,000.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Bluetooth Low Energy (Bluetooth), C++ (Programming Language), Software Debugging, Embedded C, Firmware, FreeRTOS, Modbus, Message Queuing Telemetry Transport (MQTT), Real-Time Operating Systems, Universal Asynchronous Receiver/Transmitter, Wi-Fi Technology
- **Published:** October 22, 2026
- **Apply:** https://www.ko2.co.uk/job/senior-embedded-firmware-engineer/

## About the Role

* A dedicated processor acting as security firewall and orchestrator
 * STM32 class parts, FreeRTOS, embedded C with some C++
 * SPI and UART between processors, MQTT with mutual TLS to the cloud, Modbus to third party kit
 * A substantial codebase, already around 300,000 lines

The role

You'll lead the build out of the device firmware, taking ownership of the meaty, low level problems that sort the seasoned from the merely enthusiastic: SPI bus behaviour, timing across processors, tight memory footprints, radio coexistence and field reliability. You'll set standards, mentor the wider team and have a real say in where the platform goes next.

What you'll bring

 * Strong embedded C on resource constrained microcontrollers
 * FreeRTOS or comparable RTOS experience
 * Real depth in hardware facing debugging with scopes and logic analysers
 * Wireless connected device experience; ESP32, BLE, WiFi or Thread
 * MQTT, TLS and secure device to cloud communication
 * An open mind towards AI assisted development
 * Smart energy, metering, IoT gateway or EV charging background would be a bonus

## Description

This is not one of those roles where you inherit a dusty codebase and a twelve month backlog of bug tickets. It's a genuinely novel piece of engineering in one of the most consequential sectors in the country, and our client is after a proper seasoned firmware engineer to take the technical lead on the device side.