Senior Power Electronics Firmware Engineer

The role

You will develop firmware for motor drive and power systems. You will contribute to all stages from concept and prototyping through validation and high-volume production.

What you will do

• Develop and improve motor control and power management firmware
• Add and maintain protection features like overcurrent and overtemperature handling
• Bring up and debug new boards in the lab with the electrical team
• Test and tune motor performance and build automated tests
• Support manufacturing test and calibration
• Investigate issues from the field
• Work with software, mechanical, and product teams to turn member feedback into firmware improvements
• Take part in design and code reviews

Required qualifications

• 5+ years of embedded firmware development
• 3+ years focused on motor control or power electronics
• Expert C development for real-time, resource-constrained systems
• Experience developing multithreaded firmware on an RTOS, including scheduling, synchronization, and interrupt handling
• Hands-on experience implementing FOC for PMSM/BLDC motors, including current-loop tuning and sensored or sensorless position estimation
• Solid power electronics fundamentals: inverters, DC-DC converters, PWM techniques such as SVPWM, gate drivers, current and voltage sensing, and thermal behavior
• Experience designing discrete-time control loops, filters, and observers, and modeling them in MATLAB/Simulink or Python
• Experience with motor-control MCUs or DSPs (e.g., TI C2000, STM32, NXP) and communication protocols such as CAN, UART, SPI, and I2C
• Experience with safety-critical systems, including protection, fault handling, and diagnostics for high-power hardware
• Comfortable debugging at the hardware/firmware boundary with oscilloscopes, current and differential probes, power analyzers, and dynamometers
• Great oral and written communication skills

Nice to have

• Experience in C++ and Python
• Experience with functional or appliance safety standards, such as IEC 60730 (Class B software), IEC 60335, IEC 61508, or ISO 26262
• Experience managing regenerative energy in motor drives, such as braking resistor control and DC bus regulation
• Experience with digitally controlled power conversion, such as PFC or DC-DC stages
• Experience with unit testing, software- and hardware-in-the-loop (SIL/HIL) testing, Git, and CI tools such as Jenkins
• Experience with EMC/EMI and safety compliance testing for motor drives
• Experience with bootloaders and secure over-the-air firmware updates
• Experience shipping high-volume consumer hardware

About the company

Tonal is a company where the Firmware team in the Hardware department works to shape the core technology of a new fitness category.