Embedded Firmware Engineer

Room at the Top Recruitment; Cambridge; Hybrid; GBP 49,000 - 66,000; Full time

Job summary

Room at the Top Recruitment is seeking an Embedded Firmware Engineer for a global client in the UK. You will design, develop, and optimize production-ready firmware for low-power STM32-based IoT devices, with GNSS/LoRa integration and RTOS. This is a hybrid, 2-days onsite role with a 2-year contract.

Work across cross-functional teams in the UK, Israel, and California, contributing to a connected devices portfolio. Strong C/C++ experience and hands-on STM32 expertise are essential.

Qualifications

• Approximately five years of embedded software experience using C/C++.
• Strong STM32 experience and embedded debugging.
• Proven delivery of low-power firmware for battery-operated devices.
• Experience with GNSS, LoRa or LoRaWAN and embedded peripherals plus an RTOS.
• Ability to work independently and deliver production-ready firmware.

Responsibilities

• Design, develop, debug, and optimize embedded firmware for low-power IoT devices.
• Integrate GNSS, LoRa/LoRaWAN and hardware peripherals.
• Develop within an RTOS environment.
• Deliver production-ready, maintainable firmware in collaboration with cross-functional teams.

Skills

Embedded C/C++

STM32 MCU

Low-power design

GNSS/LoRa/LoRaWAN

I2C/SPI/ADC/DAC

RTOS (FreeRTOS)

VS Code

STM32CubeIDE

Autonomous working

Tools

Git

J-Link/ST-Link

Oscilloscopes

Logic analyzers

Job description

Embedded Firmware Engineer

Our global client’s Technology Solutions division is evolving. They are moving to a Product Operating Model - a new way of working that empowers product teams to take full ownership and accountability for delivering customer and business value in ways our customers love and that work for the business.

Their product and platform teams are cross-functional and durable, bringing together all the skills required to deliver impactful outcomes. Each team includes a Product Manager, Technology Lead, Product Designer, Delivery Lead, engineers, and developers.

They believe in customer centricity, ownership, and accountability. Solutions must be:

• Valuable - customers choose to buy or use them
• Viable - aligned with business constraints and goals
• Usable - intuitive and user-friendly
• Feasible - achievable with our technical capabilities

Leadership of the Product team is shared between the Product Manager and the Technology Lead, ensuring balanced guidance that bridges product vision and technical execution.

Join them as they build the team that will develop and deliver our future generations of Vence Collar. A product rich in technological challenges across the multidisciplinary domains with its advanced system architecture and connectivity. You will experience the success of your work in customers hands with short delivery cycles and quick customer feedback.

As an Embedded Software Engineer, you will have significant impact on our multidisciplinary R&D projects, grow with us as we venture into new technologies, and contribute to the connected devices line of products throughout both discovery and delivery. You will design, develop, debug, and optimize robust, production-ready firmware for resource-constrained, low-power IoT devices.

The role is a full-time temporary contract position signed off for 2 years offering hybrid working (2 days onsite and 3 days from home). Our client offers an hourly rate of £31.54 - £23.64 per hour depending on experience, plus 25 days holiday.

Duties

The responsibilities will include designing, developing, debugging, and optimizing embedded firmware for low-power STM32-based IoT devices; integrating GNSS, LoRa or LoRaWAN, and hardware peripherals; Developing within an RTOS environment; and delivering reliable, maintainable, production-ready code in collaboration with multidisciplinary product and platform teams in the UK, Israel and California, USA.

Experience, Skills & Knowledge

The position requires strong practical embedded engineering capability, sound technical judgement, and the ability to work effectively with software, hardware, systems, integration, and test stakeholders.

• Embedded software: Approximately five years of professional experience developing embedded systems in C/C++.
• Microcontrollers: Strong hands-on experience with STM microcontrollers, specifically STM32.
• Low-power systems: Proven experience developing ultra-low-power, battery-operated devices.
• GNSS and connectivity: Experience integrating GNSS modules and implementing or troubleshooting LoRa or LoRaWAN communications.
• Hardware interfaces: Deep understanding of I2C, SPI, ADC, DAC, PWM, and external EEPROM.
• RTOS: Professional experience with an RTOS, preferably FreeRTOS.
• Development tools: Proficiency with VS Code and/or STM32CubeIDE.
• Working style: Self-motivated, pragmatic, organized, and able to work autonomously while communicating progress and blockers clearly.

Qualifications & Education

Requirements

• Approximately five years of embedded software engineering experience using C/C++.
• Hands-on experience with STM32 microcontrollers and embedded debugging.
• Proven delivery of low-power firmware for battery-operated devices.
• Experience with GNSS, LoRa or LoRaWAN, embedded peripherals, and an RTOS.
• Ability to work independently and deliver production-ready, maintainable firmware.

Desirable Skills

• Experience with u-blox M10 or newer GNSS architectures.
• Familiarity with oscilloscopes, logic analyzers, multimeters, and J-Link or ST-Link.
• Experience with Git and collaborative development workflows.
• Ability to read hardware schematics and PCB layouts.
• Experience using AI-assisted development tools such as GitHub Copilot or comparable tools