Lead Firmware Engineer – Power Conversion Control

🕒 October 9

🏄 California – Remote

🏄 California – Remote

💵 $150k - $175k / year

⏰ Full Time

🟠 Senior

🔧 Hardware Engineer

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Proper Voltage

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2020

🏭 Manufacturing

⚡ Energy

☁️ SaaS

Manufacturing • Energy • SaaS

Proper Voltage is a B2B technology company providing a Battery Operating System (bOS) — a control layer and software platform that bridges advanced battery chemistries and real-world product power systems. The platform enables product manufacturers and battery makers to adopt new battery technologies safely and without hardware redesign or recertification, optimizing energy use, safety, and deployment speed. Proper Voltage focuses on integrating diverse battery chemistries, simplifying certification and integration cycles, and delivering software-driven power management and monitoring for commercial and industrial products.

📋 Description

• Lead real-time control firmware for bidirectional DC/DC power conversion stages • Implement control loops for four-switch buck-boost stages, multiphase interleaved operation, and phase current balancing • Develop compensators, mode arbitration, scheduler/ISR architecture, and platform abstraction within a portable DC/DC control library • Implement converter protections including cycle-by-cycle current limit, overvoltage, undervoltage, thermal derating, gate-drive fault handling, and safe-state transitions • Verify firmware against control models through closed-loop simulation and defined-tolerance response comparison • Architect and maintain deterministic fast-control and supervisory tasks with measured jitter and documented worst-case execution time • Configure and validate PWM, ADC, comparator, DAC, trigger, sampling, dead-time, and protection architectures • Measure sampling, computational, and PWM update latency on target and communicate results to the controls engineer • Implement operating modes including constant current, constant voltage, constant power, current limit, soft-start, buck-to-boost transition, phase shedding, and charge/discharge reversal • Bring up converter hardware in the lab through full envelope characterization, including gate-drive debugging, dead-time optimization, and shoot-through avoidance • Support loop gain, transient response, and efficiency testing and debug model-to-hardware discrepancies • Build on-target unit tests and hardware-in-the-loop regression infrastructure • Author firmware specifications and certification verification evidence supporting UL 1973, UL 1998, and UL 9540 • Serve as technical lead, review control and embedded code, and contribute to hardware design reviews

🎯 Requirements

• BS in Electrical Engineering, Computer Engineering, or equivalent demonstrated capability • Six or more years developing production embedded firmware in C for resource-constrained real-time systems • Production control firmware experience on switched-mode power converters, inverters, or motor drives • Working knowledge of PID and 2p2z/3p3z difference equations, discretization, sampling and computational delay, saturation, and anti-windup • Fluency with high-resolution PWM, PWM-triggered ADC, analog comparators, DACs, and DMA • Fixed-point arithmetic competence, including Q-format scaling, range and overflow analysis, and saturating behavior • Deterministic ISR design under hard timing constraints and ability to measure and defend worst-case execution time • Independent lab capability with oscilloscopes, isolated and differential probes, current probes, electronic loads, and bidirectional supplies • Version control, code review, specifications, and test evidence experience • Ability to work in the United States; visa sponsorship is unavailable • Preferred: dsPIC experience, dsPIC33C/33CK/33CH, MPLAB X, XC16, Microchip digital power ecosystem • Preferred: bidirectional and multiphase interleaved converter control, average current mode control, GaN/SiC, ARM Cortex-M, PLECS, MATLAB/Simulink, network analyzer measurements, battery energy storage/EV charging/PV/grid-interactive converters, functional safety and certification, MISRA C, static analysis, CAN/CANopen, and portable control libraries

🏖️ Benefits

• Equity options as part of the compensation package • Comprehensive healthcare benefits (medical, dental, vision) • Generous paid time off • Paid holidays (PTO) policy

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