BMS Software Development Engineer

• Develop and own operating state machines and mode management, including supervisory coordination across multiple controllers
• Implement high-voltage sequencing, including precharge control, contactor activation/deactivation, contactor diagnostics, and interlock handling
• Implement protection strategies for overvoltage, under voltage, overcurrent, temperature extremes, isolation loss, and thermal events
• Implement current and power limit calculation and arbitration, including derate strategy
• Implement cell balancing demand logic across modules and strings
• Implement thermal management control, actuation, setpoint strategy, and thermal diagnostics
• Aggregate measured and estimated states for system-level reporting
• Propagate and announce faults to external systems
• Own diagnostic strategy, including fault detection, debounce, classification, storage, clearing, and reporting
• Integrate and calibrate estimation models delivered by algorithm engineering
• Own the calibration parameter set and its documentation
• Develop application software using model-based development with production code generation and handwritten C
• Author software requirements and design documentation traceable to system requirements
• Support safety and security analyses
• Support validation debug, root cause analysis, and field issue resolution

• Bachelor's degree in Electrical, Computer, Mechatronics, Controls, or Mechanical Engineering
• 5+ years developing embedded application or control software for electronic control units
• Model-based development proficiency with production code generation
• Working C ability
• Demonstrated state machine, sequencing, and diagnostic strategy design on a production program
• Requirements-driven software development with traceability, unit testing, and code review discipline
• Comfort working directly with hardware, benches, and instrumentation to debug control behavior
• Strong written and verbal communication skills
• Ability and willingness to travel occasionally
• Candidates must be legally authorized to work in the United States
• Visa sponsorship is not available
• Preferred:
  Master's degree in Electrical Engineering, Controls, or a related technical field
• Preferred:
  Battery management control software experience, including contactor sequencing, protection strategy, limit calculation, and balancing
• Preferred:
  High-voltage system experience and understanding of isolation, precharge, and interlock principles
• Preferred:
  Software development under functional safety process requirements, including safety mechanism implementation
• Preferred:
  Calibration methodology and parameter management for production programs
• Preferred:
  Coordination or aggregation logic across distributed controllers
• Preferred:
  Thermal management control strategy experience

Demonstrates expertise in developing embedded application software and control strategies for electronic control units, with a strong focus on model-based development, high-voltage systems, and diagnostic strategies. Proficient in requirements-driven software development and capable of integrating hardware with software for effective control behavior.

• Embedded Application Development
• Model-Based Development
• High-Voltage System Experience
• Diagnostic Strategy Design
• Requirements-Driven Software Development

• C Programming
• State Machine Design
• Control Software Development
• Thermal Management Control
• Fault Detection and Reporting
• Calibration Methodology
• Power Limit Calculation
• Cell Balancing Logic
• Safety Mechanism Implementation
• Unit Testing

• Strong Written Communication
• Strong Verbal Communication

• Electrical Engineering
• Controls Engineering
• Battery Management Control
• Functional Safety Process
• Isolation Principles

• Instrumentation
• Debugging Tools
• Production Code Generation