Power Electronics Lead, Solid-State Battery Systems

QuantumScape Battery, Inc.; San Jose (CA); Hybrid; USD 155,000 - 237,000; Full time

Benefits offered by this job

Annual bonus

RSU/Equity

Health care

ESPP

Job summary

QuantumScape is pursuing a Power Electronics Lead to own the end-to-end power conversion architecture for solid-state battery systems, from AC mains to regulated rails and the bidirectional path for the pack.

You will be the chief engineer for the power stage, driving topology decisions that cascade across all disciplines and optimizing efficiency and density for rack-scale deployment. This on-site role requires hands-on leadership in a fast-moving environment.

Qualifications

• 10+ years designing multi-kW AC-DC or DC-DC power converters that shipped in volume.
• Bachelor’s degree plus 12+ years of experience or Master’s with 10+ years or PhD with 8+ years.
• Deep expertise in LLC, PSFB, DAB, CLLC topologies or equivalent.
• Hands-on magnetics design experience (core selection, winding strategy, loss modeling).
• Experience with digital power control (DSP/MCU-based compensators).
• Track record in server PSU, telecom rectifier, EV onboard charger, or similar high-density power product.
• Proficiency with simulation tools (PLECS, LTspice, Simplis, PSIM).
• Comfortable leading technical direction and mentoring a small cross-functional team.

Responsibilities

• Architect end-to-end power conversion topology (AC-DC front end, intermediate bus, DC-DC output stage, bidirectional battery path).
• Lead topology trade-off analysis (LLC, PSFB, hybrids, inline vs sidecar integration).
• Design magnetics and select power semiconductors with thermal derating analysis.
• Define and drive efficiency targets and power density within rack envelope.
• Collaborate with firmware/embedded on digital control loop implementation.
• Define charge/discharge path, voltage window, and current limits for solid-state cells.
• Design protection circuits and fault response behavior.
• Bring up and validate prototype power stages, performing thermal and efficiency optimization.
• Interface with PCB layout contractor for EMI-conscious layout and power integrity.

Skills

Power conversion

LLC topology

PSFB topology

GaN/SiC FETs

Thermal analysis

Digital control

Magnetics design

EMI layout

Team leadership

Mentoring

Education

Bachelor’s degree

Master’s degree

PhD

Tools

PLECS

LTspice

PSIM

PLECS RT Box

Job description

QuantumScape is pursuing a Power Electronics Lead to own the end-to-end power conversion architecture for solid-state battery systems, from AC mains to regulated rails and the bidirectional path for the pack.

You will be the chief engineer for the power stage, driving topology decisions that cascade across all disciplines and optimizing efficiency and density for rack-scale deployment. This on-site role requires hands-on leadership in a fast-moving environment.