1 month ago
Base Salary
$200k - $280k/yr
Responsibilities
- Develop and maintain charger firmware for AC-DC power conversion, power factor correction, and isolated DC-DC conversion.
- Implement multi-stage constant-current/constant-voltage lithium-ion charging profiles with appropriate voltage, current, temperature, and cell-chemistry limits.
- Architect CAN or similar embedded-bus communication between the charger and battery management system.
- Implement voltage and current regulation, soft-start sequencing, fault detection, protection logic, and safe-state transitions.
- Test, validate, and verify initial firmware releases for functionality, reliability, and performance.
- Diagnose firmware-hardware boundary issues using laboratory instrumentation and collaborate with hardware, electrical, and systems engineers.
Requirements
- 7+ years of embedded firmware development in C/C++ on real hardware for a staff-level position, including interrupts, DMA, and timing-critical execution.
- Working knowledge of switched-mode power supplies, including flyback, LLC, phase-shifted full-bridge, power factor correction, transformer isolation, switching frequency, duty cycle, and phase shift.
- Understanding of lithium-ion charging protocols, including constant-current/constant-voltage and multi-stage charging, cell degradation, temperature effects, and charge termination.
- Hands-on CAN implementation for charger-to-BMS coordination and familiarity with SPI, I²C, and UART.
- Experience debugging hardware and firmware interactions with oscilloscopes, current probes, and power analyzers.
- Preferred qualifications include safety-critical or fault-tolerant embedded systems experience; familiarity with IEC 61508 or ISO 26262; FreeRTOS, SafeRTOS, or similar experience; and robotics, autonomous systems, or complex electromechanical product experience.
Benefits
- Comprehensive medical, dental, and vision coverage.
- Paid time off, company holidays, and parental leave.
- 401(k) plan with company match.
- Flexible Spending Account and Health Savings Account options.
- Commuter benefits for transit and parking.
- Short-term and long-term disability insurance, life insurance, and an Employee Assistance Program.
- Onsite snacks and catered lunches.
About 1X
1X builds and manufactures humanoid robots designed to perform real-world physical tasks in homes and workplaces, paired with AI-driven control software. The company pursues a hardware-plus-software robotics business model, with development focused on general-purpose manipulation and mobility. Founded in 2015 and headquartered in Palo Alto, it is privately held and operates in the robotics, AI, and electronics manufacturing domains, with products including the EVE and NEO humanoid platforms.