engineering
Posted Jan 14Staff Power Electronics Engineer
Louisville, United StatesHybrid
Responsibilities
- - Lead schematic design and high-density PCB layout (Altium), including stack-up, creepage/clearance strategy, high-current power paths, and gate-drive layout.
- - Design and optimize wide-bandgap power stages (SiC and/or GaN): switching behavior, gate drive, protection, sensing, isolation, and thermal/packaging constraints.
- - Drive EMI/EMC design and debug: grounding strategy, filtering (CMCs, Y-caps, etc.), shielding approaches, and layout practices; partner with test teams through pre-compliance and compliance efforts.
- - Build and execute hardware test and characterization plans (DVP&R): DPT, thermal, fault response, transient behavior (and more) across the operating envelope.
- - Collaborate with motor control team to ensure clean interfaces (sensing, protection, comms, timing), and support integrated system bring-up in the lab. Required
- The design, manufacturing, and testing of their products is done in-house at their headquarters in Louisville, Colorado.
Requirements
- At 12 kW/kg continuous, the HPDM family of integrated motor drives is a step change in electric propulsion technology and removes one of the main barriers blocking widespread proliferation of electric and hybrid aircraft.
- experience in the entire product development cycle including
- - Be the “go-to” for debugging: efficiently isolate root cause across electrical/mechanical/firmware interfaces and implement corrective actions (design changes, manufacturing improvements, etc).
- experience in power electronics hardware, with scope appropriate for Senior or Staff level ownership. - M.S./Ph.D. in Electrical Engineering or equivalent experience - Deep hands-on
- experience with high-density PCB layout for power electronics (Altium strongly preferred): disciplined component placement, current return paths, loop minimization, and mixed-signal best practices. - Demonstrated
- experience with wide-bandgap devices (SiC and/or GaN) and their practical design implications (gate drive, dv/dt, di/dt, protection, layout sensitivity), as well as high-voltage, high-current constraints: isolation strategy, creepage/clearance, partial discharge, etc.
- - Proficiency in at least two of: Altium, LTSpice/PLECS, MATLAB/Simulink, and comfort learning new tools quickly.
- - Strong fundamentals in power conversion, magnetics basics, sensing/isolation, protection, and control interface
- experience taking an inverter/power electronics product from concept to production, ideally in aerospace, automotive, or similarly rigorous environments. -
- Experience with EMI/EMC standards and compliance workflows (e.g., DO-160G or similar), including design-for-compliance and lab troubleshooting. -
- Experience with parasitics extraction / field solvers (e.g., Ansys Q3D) and correlating models to bench measurements.
- - Familiarity with motor drive systems (PMSMs, FOC concepts) and practical integration considerations (sensing, timing, protection coordination).
- - Mechanical integration awareness: packaging constraints, thermal interfaces, and collaboration with mechanical teams (Solidworks proficiency is a plus).
- They have developed a family of integrated motor drives that can scale in power from 30kW to 30MW with power densities as high as 12 kW/kg and best-in-class efficiency.
- H3X’s world-class team is composed of experts from Tesla, SpaceX, GE Aviation, and Siemens with deep knowledge in electric machines, power electronics, material science, control systems, and advanced manufacturing.
Experience
- Qualifications - 5+ years professional
Benefits
- Benefits & Compensation - Compensation: $140,000 - $235,000 annual salary - Employee equity incentive plan - Health insurance: medical, vision, dental, ST & LT disability, and life - Gym membership stipend (up to $60/month) - Outdoor Recreation Reimbursement ($900 annual maximum) - Flexible hours (deliverable-based goals) - Flexible time off (just need manager approval) - Relocation package - Monthly company events - 401k program The Company H3X Technologies is a U.S.-based manufacturer of electric motors
Contact
- About the Role At H3X https://www.h3x.tech/, we are building the most advanced electric motors in the world for sustainable aviation, marine, industrial, and defense applications.
Additional details
- Our motors range in size from 30 kW to 30 MW, include integrated drives, and are 3X lighter than competitors’ systems.
- requirements definition, design and analysis, and test and validation. You will be a key part of the core engineering team and will have a direct impact on the trajectory of the company.
- Responsibilities - Own the power electronics hardware for high power density integrated motor drives, from
- requirements → concept → prototype → production readiness. - Translate product
- requirements (performance, safety, reliability, manufacturability, testability).
- - Develop and validate designs using circuit and system simulation (LTSpice / PLECS / MATLAB/Simulink or equivalent).
- - Partner with Supply Chain / Manufacturing on DFM/DFT, PCB fab/assembly coordination, inverter BOM ownership, and sustaining support through prototype builds.
- - Excellent debugging and bring-up skills: can take a new inverter from “first power” to stable operation; comfortable with oscilloscopes/differential probes, current probes, impedance considerations, and safe high-power lab practices.
- - Demonstrated track record of mentoring engineers and raising the bar on hardware quality, review rigor, and lab practices.
- This high performance is enabled by novel scalable core technology and proprietary manufacturing processes for motor stacking, winding, and assembly.