Senior Embedded Software Engineer, IONATE

• A degree in electronics, embedded systems, software engineering, or related discipline, with demonstrated industrial experience
• You will have around 5+ years of industrial experience building real-time embedded systems – developing, shipping and supporting firmware in complex products, from prototype through to deployment
• Solid understanding of real-time and deterministic embedded software design principles
• Demonstrable experience of working on embedded software projects using C/C++
• Solid understanding of C and its underlying implementation cost function
• You can write efficient, predictable and maintainable code under strict constraints
• Proven experience developing bare-metal and RTOS applications, managing interrupt priorities and latency budgets, and debugging race conditions and timing issues in deployed real-time systems
• Solid understanding of interrupt handling, inter processor communications and synchronisation mechanisms
• Good knowledge of performance optimisation techniques and hardware/software interaction
• You can diagnose firmware–hardware faults using oscilloscopes, logic analysers, JTAG debuggers, and low-level inspection
• Soft Skills
• Strong communication and written skills
• Willingness to travel nationally and internationally for testing/commissioning when required

Desirable

• IONATE is a deep technology start-up building the technology backbone for smart grids. We are looking for a Senior Embedded Software Engineer to join our team and take ownership of real-time firmware development—from concept through to commercial deployment in the field
• You'll work with our hardware and systems team to design and implement production C/C++ firmware. Your role will span embedded software architecture, control algorithm implementation, hardware-firmware integration, and active participation in verification, validation, and live product testing
• You will bring a practical, evidence-based approach to engineering decisions and contribute to advancing our HIT technology for grid-connected systems
• Develop embedded software for grid-connected inverters
• Design and implement real-time firmware from scratch for ARM Cortex-M microcontrollers; manage memory, peripherals, interrupts, and debug low-level issues
• Develop bare-metal and RTOS-based applications; reason about latency budgets, interrupt priorities, and timing edge cases in real-world deployments
• Implement real-time platforms where to deploy control algorithms and closed-loop firmware that operate within hard timing constraints and safety requirements for grid-connected applications
• Bring up new hardware platforms: configure peripherals, integrate sensors and actuators, validate functionality, and document the integration process
• Troubleshoot firmware–hardware faults in test rigs and in the field; reproduce issues, analyse logs, and deliver robust fixes without disrupting future deployed systems
• Work closely with hardware engineers, power electronics specialists, control engineers, and systems teams to define interfaces, timing budgets, and validation strategies
• Participate actively in code reviews, design discussions, technical analyses and help raise the standard of the codebase
• Contribute to safety and quality processes: able to identify regulatory standard compliance and ensure firmware aligns accordingly, maintain traceability, and document design decisions and test evidence
• Create and maintain technical documentation including requirements, design specifications, test reports, and architecture notes
• Work within clear timescales to deliver projects on time with ambitious product goals