Low-Power Embedded Firmware Engineer (STM32, RTOS)

QCS Staffing Ltd; Cambridge; On-site; GBP 55,000 - 75,000; Full time

Job summary

QCS Staffing Ltd in Cambridge is seeking an experienced Embedded Firmware Engineer for a 2-year contract in Life Sciences. You will design, develop and optimise firmware for low-power STM32-based IoT devices, integrating GNSS and LoRa/LoRaWAN for robust, production-ready solutions.

You will work with hardware, software, systems, and test teams to deliver reliable embedded software in an RTOS environment, ensuring performance and maintainability across the full development lifecycle.

Qualifications

• Extensive embedded software engineering experience with C/C++.
• Strong hands-on STM32, embedded debugging and low-power battery devices.
• Experience with GNSS, LoRa/LoRaWAN, RTOS (preferably FreeRTOS) integrations.

Responsibilities

• Design, develop, debug, and optimise embedded firmware for low-power STM32-based IoT devices and connected products.
• Integrate GNSS modules, LoRa/LoRaWAN communications, and hardware peripherals for production-ready solutions.
• Develop and maintain embedded software within an RTOS environment for reliability, performance.
• Collaborate with multidisciplinary engineering teams across the full development lifecycle.

Skills

C/C++

STM32

RTOS

FreeRTOS

GNSS

LoRaWAN

Embedded debugging

Low-power design

Cross-functional teamwork

Job description

QCS Staffing Ltd in Cambridge is seeking an experienced Embedded Firmware Engineer for a 2-year contract in Life Sciences. You will design, develop and optimise firmware for low-power STM32-based IoT devices, integrating GNSS and LoRa/LoRaWAN for robust, production-ready solutions.

You will work with hardware, software, systems, and test teams to deliver reliable embedded software in an RTOS environment, ensuring performance and maintainability across the full development lifecycle.