Senior Motor Drive Firmware Engineer

Tonal; San Francisco (CA); On-site; USD 150,000 - 210,000; Full time

Job summary

Tonal is seeking a Senior Power Electronics Firmware Engineer to craft firmware for motor drive and power systems powering our digital weight platform. You will contribute from concept through bring-up and validation, collaborating across hardware, software, and product teams to deliver robust, high-volume production firmware.

You will tackle motor control, power conversion, thermal management, and safety challenges, with opportunities to influence core technology in a cutting-edge fitness

Qualifications

• 5+ years of embedded firmware development, including motor control/power electronics
• Expert C development for real-time, resource-constrained systems (C++ and Python)
• Experience with RTOS-based multithreaded firmware and timing-critical tasks
• Hands-on experience implementing FOC for PMSM/BLDC motors and sensorless estimation
• Strong power electronics fundamentals: inverters, DC-DC converters, PWM, gate drivers
• Experience with MATLAB/Simulink or Python for modeling control loops
• Experience with motor-control MCUs/DSPs and CAN/UART/SPI/I2C protocols
• Experience with safety-critical systems, protection, fault handling, diagnostics
• Comfort debugging at hardware/firmware boundary with test equipment
• Excellent communication and teamwork skills

Responsibilities

• Develop and improve motor control and power management firmware
• Add and maintain protection features (overcurrent/overtemperature)
• Bring up and debug boards with electrical team
• Test and tune motor performance; build tests for releases
• Support manufacturing test and calibration; investigate field issues
• Collaborate with software, mechanical, and product teams to improve firmware
• Participate in design and code reviews to improve firmware shipping processes

Skills

Embedded C

C/C++

Python

RTOS

FOC motors

Motor control

CAN/UART/SPI/I2C

MATLAB/Simulink

Multithreading

Safety-critical

Tools

TI C2000

STM32

NXP

Job description

Tonal is seeking a Senior Power Electronics Firmware Engineer to craft firmware for motor drive and power systems powering our digital weight platform. You will contribute from concept through bring-up and validation, collaborating across hardware, software, and product teams to deliver robust, high-volume production firmware.

You will tackle motor control, power conversion, thermal management, and safety challenges, with opportunities to influence core technology in a cutting-edge fitness