Embedded Firmware Engineer

Salary: £40,000 - 40,000 per year

Requirements:

• 2+ years of professional embedded firmware development experience
• Strong proficiency in C and C++ for bare-metal and RTOS-based systems
• Hands-on experience with ARM Cortex-M architecture
• Proven experience with STM32 and/or ESP32 microcontrollers
• Solid understanding of embedded communication interfaces: I2C, SPI, UART, CAN
• Ability to read and interpret schematics and datasheets
• Comfortable working across multiple concurrent projects with varying requirements
• Experience with FreeRTOS and/or Zephyr RTOS
• Familiarity with Linux-based development environments, including build systems, shell scripting, and toolchains
• Python development experience, particularly on Raspberry Pi platforms
• Awareness of industry standards relevant to medical or automotive development
• Experience with version control (Git) and CI/CD pipelines for embedded systems
• United Kingdom work authorisation required

Responsibilities:

• Design, develop, and maintain firmware in C/C++ for embedded microcontroller-based systems across multiple client projects
• Develop drivers and middleware for communication interfaces including I2C, SPI, UART, and CAN
• Work with STM32 and ESP32 platforms across the full development lifecycle, from hardware bring-up through to production release
• Implement real-time applications using FreeRTOS and/or Zephyr
• Develop supporting tooling and automation scripts in Python, including on Raspberry Pi-based platforms
• Debug and optimise firmware using tools such as JTAG/SWD debuggers, logic analysers, and oscilloscopes
• Collaborate with hardware engineers to review schematics and support PCB bring-up
• Engage directly with clients to understand requirements and communicate technical progress where needed
• Contribute to code reviews and uphold high standards of code quality, documentation, and traceability, particularly important in regulated industries such as medical and automotive

Technologies:

• ARM
• CI/CD
• Embedded
• Firmware
• FreeRTOS
• Git
• Hardware
• Support
• Linux
• Python
• AUTOSAR
• C++

More:

We are CircuitWorx, a design consultancy delivering innovative embedded systems solutions across a broad range of industries. Our engineers work on varied, challenging projects spanning industrial sensing and control, consumer electronics, medical devices, and automotive applications, so no two projects are the same. We are based at our office in West Dean, Salisbury, in a role that is office-based and easily accessible by rail, with the local train station within walking distance. This is an initial 3-month contract with an opportunity to become permanent. We offer a salary from £40,000 depending on experience, annual profit share, a workplace pension with company contributions, private healthcare, a 36-hour working week with flexible working patterns, casual dress, company events, free and on-site parking, private medical insurance, sick pay, ongoing professional development and training opportunities, and a collaborative, engineering-led culture with real ownership of your work.

last updated 39 week of 2026