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Senior/Principal Motor Controls Firmware Engineer (5–15 Years Experience)

Liberty Lake, Washington

 

About Us

Infinitum has raised the bar for a new generation of motor that is better for the planet and people. The company's patented air core motors offer superior performance in half the weight and size, at a fraction of the carbon footprint of traditional motors, making them pound for pound the most efficient in the world. Infinitum motors open up sustainable design possibilities for the machines we rely on to be smaller, lighter and quieter, improving our quality of life while also saving energy and reducing waste. Based in Austin, Texas, Infinitum is led by a team of industry experts and pioneers. To learn more, visit goinfinitum.com.

Position Overview

We are seeking a Motor Controls Firmware Engineer with 5–15 years of experience to join a collaborative, hands-on engineering team. This role focuses on developing and maintaining control firmware for our family of Axial flux PCB stator motors. This is an on-site role in our Austin, Texas or Liberty Lake, Washington office; we currently cannot sponsor visas.

Key Responsibilities

  • Design, develop, and maintain embedded motor control firmware in C for Texas Instruments motor control C2000 real-time microcontrollers
  • Implement and optimize low-level drivers and hardware interfaces
  • Participate in code reviews and contribute to design discussions
  • Debug and resolve firmware issues, including root cause analysis
  • Collaborate with cross-functional teams including hardware and systems engineers
  • Contribute to new feature development and ongoing product improvements
  • Perform hands-on testing and validation using lab equipment

Required Qualifications

  • 5–15 years of experience in embedded motor control firmware development using C and/or C++ with a demonstrated history of delivering production quality code
  • Solid understanding of motor control Field Oriented Control and Space Vector Modulation theory:
    • Clarke and Park transforms
    • Space Vector PWM (SVPWM)
    • Current, voltage, and speed control loops
    • Rotor position estimation techniques (e.g., back-EMF observers, sliding mode observers, PLLs)
    • Experience with sensorless estimation techniques across operating ranges (startup, low-speed, high-speed)
  • Strong experience developing low-level drivers using interfaces such as: I2C, SPI, GPIO, UART, PWMs, Interrupts
  • Experience with version control and development tools (e.g., Git, Jira, Bitbucket or similar)
  • If located in our Liberty Lake, Washington office - willingness to travel to the Austin, Texas office 25-50% of time during key development cycles.

Preferred Qualifications

  • Familiarity with TI's MotorControl SDK, C2000Ware, or Code Composer Studio
  • Experience with motor simulation tools (e.g. Typhoon HIL, PLECS RT Box)
  • Experience with using scripting languages for testing (e.g. Python)
  • Familiarity with RS485 and Modbus communication protocols
  • Hands-on lab experience with debugging tools such as oscilloscopes, dynamometers, logic analyzers, etc.

What You Can Expect in Your First Six Months

  • Integrate into a collaborative and close-knit engineering team
  • Gain familiarity with existing motor control and communication codebases
  • Actively participate in code reviews and technical design discussions
  • Contribute to motor control firmware feature implementation and bug fixes
  • Work directly with motors and embedded systems in a lab setting

Benefits

We have created a community at Infinitum, where everyone feels a sense of belonging and is working together to achieve our goals.

  • Comprehensive Health Coverage (Medical/Dental/Vision)
  • Short-Term & Long-Term Disability Coverage
  • Health Savings Account (HSA) – includes employer contributions.
  • Flexible Spending Account (FSA) & Limited Purpose Flexible Spending Account
  • 401(k) – Traditional and Roth
  • Stock Options
  • Open Paid Time Off (PTO)
  • 12 Paid Holidays
  • Potential Relocation Assistance
  • Flexible schedule – including hybrid possibilities
  • Company Paid Lunch on Fridays
  • Community Give-back Opportunities

Infinitum embraces diversity and is an equal-opportunity employer.

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