Sr. Motor Control Engineer

SF MOTORS, INC. (dba SERES) is dedicated to advancing electric drivetrain technology. We focus on developing innovative and reliable electric drive systems that deliver exceptional performance and efficiency. Our mission is to provide cutting-edge drive unit solutions to electric vehicle companies worldwide.

Duties and Responsibilities

• Motor Control Architecture & Algorithms
  • Design, implement, and optimize FOC / torque/velocity / position control loops for rotary and linear actuators
  • Develop high-bandwidth real-time control loops and state estimation algorithms
  • Build dynamic models of actuator systems and conduct system identification
  • Develop calibration pipelines (current sensing, torque calibration, encoder alignment, friction characterization)
• Embedded Control Implementation
  • Integrate motor control algorithms into STM32 / TI / Renesas MCUs together with firmware engineers
  • Tune real-time control performance (sampling rate, ISR scheduling, filtering strategies)
  • Implement advanced features such as anti-cogging, impedance-control primitives, low-noise modes, and vibration suppression
• Actuator System Integration
  • Define electrical, sensing, and performance requirements for joint modules
  • Collaborate with hardware engineers on motor selection, inverter design, and sensing architecture
  • Debug motor behavior across complex electromechanical systems
• Testing, Tools & Diagnostics
  • Develop internal motor-testing platforms, tuning tools, and analysis pipelines
  • Analyze data logs and waveforms to diagnose performance issues

Qualifications

• M.S. or PhD in EE, ME, Controls, Mechatronics, or related field
• 3+ years of direct hands-on experience in motor-control development (FOC/servo systems)
• Strong understanding of BLDC/PMSM control fundamentals
• Hands-on experience implementing control algorithms on embedded MCUs
• Strong control-theory foundation (feedback design, filtering, system dynamics)
• Experience with encoders, current sensing, torque estimation
• Skilled with lab tools (oscilloscope, current probe, logic analyzer)
• Ability to debug nonlinearities, instability, noise, and thermal issues
• Strong Model-Based Design (MBD) experience preferred
• Advanced BLDC/FOC motor control experience preferred
• Experience with robot joint actuators (rotary/linear) preferred
• Prior experience in startup or high-growth technology environments preferred
• Highly collaborative mindset with strong communication skills; proactive and able to estimate project scope effectively
• Must be able to work onsite and willing to travel internationally up to 10% annually

Why Join Us

• Work on high-performance control, precision actuation, and sensor fusion
• Join a high-ownership, fast-paced startup environment
• Contribute to true 0-to-1 development of next-generation robotics

This is a Full-Time and require working onsite in Milpitas, CA.

SERES is an equal opportunity employer committed to a culturally diverse workforce. All qualified applicants will receive consideration for employment without regard to race, religion, color, age, sex, national origin, sexual orientation, gender identity, disability status or protected veteran status.