Senior Firmware Engineer

Salary: £50,000 - 55,000 per year

Requirements:

• Bachelors or Masters degree in Computer Science, Electrical Engineering, or a related field
• Typically 5+ years of experience in production-quality embedded firmware development
• Strong proficiency in C/C++ and Python programming
• Strong experience with STM32 microcontrollers and the surrounding toolchain, or a comparable ARM Cortex-M family
• Strong familiarity with IoT protocols such as MQTT and LoRaWAN
• Experience with cloud integration, preferably with AWS IoT Core
• Excellent debugging skills for hardware and firmware issues
• Familiarity with version control systems such as Git and static code analysis tools
• Strong problem-solving skills
• Excellent communication and teamwork skills
• Experience defining and implementing firmware test approaches, including automated and on-hardware testing
• Experience with binary protocol design and decoding of packed sensor payloads
• Ability to reliably commute to Cambridge CB4 0WG or relocate before starting work
• Work authorisation in the United Kingdom

Responsibilities:

• Contribute to firmware development and share technical knowledge and best practices with team members
• Design, develop, and maintain embedded firmware for IoT devices using C/C++ and Python
• Collaborate with hardware engineers to ensure seamless integration between firmware and hardware
• Implement and optimise communication protocols such as MQTT and LoRaWAN
• Integrate firmware solutions with cloud platforms such as AWS IoT Core
• Analyse and debug complex hardware and firmware issues
• Maintain existing codebases, improving documentation and code quality where required
• Implement version control best practices, CI/CD, and static code analysis tools to ensure code stability
• Continuously explore and evaluate new technologies to improve product performance and functionality
• Maintain and develop the firmware test regime, including unit, integration, and on-hardware testing, and the validation process ahead of each release
• Build and maintain the software modules that decode and unpack raw device payloads into structured, validated data
• Interrogate device data to validate firmware behaviour, diagnose field issues, and support colleagues with wider data analysis

Technologies:

• ARM
• AWS
• CI/CD
• Cloud
• Embedded
• Firmware
• Git
• Hardware
• IoT
• Support
• MQTT
• Python
• pandas

More:

We are Smart Component Technologies Ltd, and we design and build IoT monitoring solutions for the rail, energy, and mining industries, bringing sensing and intelligence into environments where conventional equipment struggles. We offer the opportunity to join a small firmware engineering team working on cutting-edge IoT projects with a structured handover and support from our existing team. This is an in-person role based in Cambridge, and we offer a company pension, on-site parking, and private medical insurance.

last updated 32 week of 2026