Power Electronics Lead – Integrated Rack Power Platform

Power Electronics Lead – Integrated Rack Power PlatformLocation: San Jose, CA (On-site) Reports To: Head of Engineering, Data Center Power Platform About the RoleWe are building a first-of-its-kind integrated PSU + BBU rack power shelf that collapses the traditional two-shelf architecture (separate power supply and battery backup) into a single, high-density platform powered by solid-state battery technology. This shelf will compete directly with incumbent rack power offerings from Delta, LITEON, and similar vendors, targeting hyperscale AI data center deployments. As the Power Electronics Lead, you will own the complete power conversion architecture—from AC mains or 48V DC bus input through regulated output rails, including the bidirectional charge/discharge path for the integrated solid-state battery pack. You will serve as the chief engineer for the power stage and the technical decision-maker whose topology choices influence every engineering discipline on the team.What You'll DoArchitect the end-to-end power conversion topology, including:AC-DC front endIntermediate busDC-DC output stageBidirectional battery converter pathLead topology trade-off analysis across:LLC resonant convertersPhase-shifted full bridge (PSFB)Hybrid converter approachesIn-line versus parallel sidecar battery integrationDesign magnetics including planar transformers and coupled inductors.Select power semiconductors (GaN/SiC FETs and diodes) with thermal derating analysis.Define and drive efficiency targets (97%+ Titanium-class performance at rack load) and power density goals within a 1OU or 2OU shelf envelope.Collaborate closely with firmware and embedded engineering on digital control loop implementation including:Voltage/current mode compensationLoop bandwidthPhase margin optimizationPartner with the Battery Systems Engineer to define:Charge/discharge power pathVoltage operating windowCurrent limits for solid-state battery cellsDesign protection circuitry including:Overcurrent Protection (OCP)Overvoltage Protection (OVP)Overtemperature Protection (OTP)Short-circuit protectionDefine system fault response behavior.Bring up and validate prototype power stages through:Hardware bring-upThermal characterizationEfficiency optimizationWork closely with PCB layout engineers to ensure:EMI-conscious layoutProper creepage and clearancePower plane integrityWhat You BringRequired Qualifications10+ years designing multi-kW AC-DC or DC-DC power converters that have shipped in volume.Deep expertise in at least two converter topologies such as:LLCPSFBDABCLLCEquivalent architecturesHands-on magnetics design experience including:Core selectionWinding strategyLoss modelingExperience with digital power control using DSP/MCU-based compensation techniques.Proven track record developing:Server power suppliesTelecom rectifiersEV onboard chargersComparable high-density power productsProficiency using simulation tools including:PLECSLTspiceSimplisPSIMComfortable providing technical leadership and mentoring a small cross-functional engineering team.Preferred QualificationsExperience designing with GaN or SiC wide-bandgap power devices.Familiarity with 48V and high-voltage DC bus architectures.Experience with bidirectional power converters, especially integrated battery charging paths.Knowledge of Open Compute Project (OCP) Open Rack / ORv3 power delivery specifications.Experience developing battery charging systems including:CC-CV charging profilesTemperature-dependent charge rate managementExperience with Hardware-in-the-Loop (HIL) testing platforms including:Typhoon HILPLECS RT Box Why This Role MattersYour architectural decisions will define the entire product. Whether the battery is integrated inline or connected through a sidecar bus, whether the system utilizes GaN at 48V or silicon at 12V, and whether hold-up transfer occurs in microseconds or requires a brief interruption—every downstream engineering discipline will build upon your decisions. This is a rare opportunity to design a next-generation rack power platform from a blank sheet using breakthrough solid-state battery technology that fundamentally changes what is possible for AI data center power infrastructure.