Senior Embedded Software Engineer

Senior Embedded Software Engineer – Energy Sector EVSE

Salary: £70,000 – £90,000 + benefits
Hours: Full-time, Permanent
Location: Birmingham – Hybrid, 1-2 days per week required in the office (Flexible)

We’re looking for a Senior Embedded Software Engineer EVSE to join a growing engineering team developing high-performance technology for the energy sector.
This is a hands-on role where you’ll take ownership of embedded software and firmware from initial requirements and architecture through to integration, validation and in-service support.
You’ll work across both low-level microcontroller firmware and higher-level supervisory applications, developing software used within complex, high-power infrastructure. Reliability, performance and maintainability are critical, so we’re looking for someone who enjoys solving challenging engineering problems and taking genuine ownership of the systems they develop.
The role offers a varied technical workload, with approximately 60% new development, 30% integration and testing, and 10% in-service support.

About the candidate
You’ll be an experienced Embedded Software Engineer with a strong background in modern C++ and developing software for resource-constrained embedded systems.
You’ll be comfortable working across firmware, hardware and higher-level applications and have experience taking products beyond initial development into integration, testing and live operation.
We’re particularly interested in experience with:

• Modern C++ within embedded environments and working to MISRA guidelines
• High-performance microcontrollers such as STM
  32
• RTOS and/or bare-metal development
• CAN and Modbus RTU over RS485
• MQTT, Web Sockets and network-connected embedded systems
• Firmware and hardware integration, troubleshooting and validation
• Windows and/or Linux-based higher-level applications
• Secure boot, TLS, certificate handling and signed over-the-air firmware updates
• Automated testing, CI and hardware-in-the-loop testing
• High-voltage DC systems and power electronics

Experience with in the energy sector, industrial control, automotive, power electronics or another safety-conscious, protocol-heavy environment would be particularly relevant.

Experience with OCPP (1.6J/2.0.1/2.1), IEC 61851, ISO 15118 / DIN 70121 and Megawatt Charging System (MCS) would also be highly valuable, although direct charging-sector experience is not essential.
Bachelor’s degree in Computer Science, Electronic Engineering or a closely related discipline, or equivalent professional experience.

What you’ll do
You’ll take a leading role in the development and evolution of embedded software and firmware for complex energy infrastructure.
Your responsibilities will include:

• Eliciting and defining technical requirements and translating them into robust engineering solutions
• Designing, developing and maintaining clean, modular and efficient embedded software in modern C++
• Developing and bringing up firmware for high-performance microcontrollers
• Architecting communication gateways between hardware subsystems, connected equipment and cloud services
• Implementing and optimising CAN, Modbus RTU/RS485, MQTT and Web Socket communications
• Integrating energy meters, insulation monitoring devices, power modules, controllers and other critical hardware
• Supporting cybersecurity across connected embedded systems, including TLS, certificate management, secure boot and signed OTA updates
• Working alongside hardware engineers and external technical partners on board bring-up, diagnostics and system validation
• Using tools including oscilloscopes, CANalyzer, protocol testers and electronic loads to investigate and resolve issues
• Building automated test infrastructure, including unit testing, CI and hardware-in-the-loop testing
• Designing systems with…