Sr. Electrical Hardware Design Engineer

Louisville, CO
Full Time
Mid Level

JOB PURPOSE:

At H3X, we are building the most advanced electric propulsion systems in the world to enable sustainable electric aircraft. 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 aircraft. We have several power classes of motors ranging from 30kW to 3MW and are selling to markets of aviation, aerospace and defense, marine, and specialized ground vehicles.

About the Role: The HPDM motors includes an integrated Silicon Carbide inverter for high frequency, precise motor control. We are looking to hire a Sr. Electrical Hardware Design Engineer who will be in charge of inverter development and taking the design from prototype to production for one of our HPDM IMDs. You should be experienced in the entire product development cycle including 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.

Key Responsibilities 

  • Requirements definition based on DO-160G and internal/customer specification.
  • Explore new architectures/technologies that will improve performance, safety, and reliability.
  • Schematic and PCB design in Altium.
  • Powerstage component sizing.
  • Circuit simulation in Simplex, MATLAB/Simulink, LTSpice.
  • Multiphysics simulation in Ansys Q3D for current density and parasitics analysis.
  • Low inductance DC Link design.
  • Design for EMC (Y capacitors, EMI filter, grounding).
  • Design for DO-160G.
  • Supply chain management for DC link capacitors, busbars, PCBAs, SiC devices, sensors, EMC filter, and connectors.
  • Bill of Materials documentation management.
  • Create assembly files and build instructions for manufacturing team/partners.
  • Create Design Validation Plan and Report (DVP&R) for sub-systems as well as completed system.
  • Execute inverter testing and characterization on H3X in-house dynamometer.
  • Post process test results, identify root-cause of potential issues and make design recommendations to meet the highest level of reliability and performance.
  • Testing for EMC and DO-160G.
  • Inverter reliability and partial discharge testing.
  • Support pilot customers with first builds and integration into vehicles. Travel and on-site visits will be required.
  • Maintain prototype and testing equipment in H3X lab.

Required Qualifications 
  • High intelligence, high energy, and high integrity.
  • Masters or higher in Electrical Engineering.
  • 5+ years of professional experience with power electronics.
  • High level of proficiency with Altium, MATLAB, and PLECS/LTSpice.
  • Excellent written and verbal communicator to effectively share knowledge and build the collective mindshare of the company.
  • Organized and obsessive attention to detail: no room for oversight when designing flight critical systems.
  • Humble and open mind: willingness to accept feedback and learn, consistently improve upon yourself and the product you will be responsible for.
  • A high degree of emotional intelligence: ability to collaborate closely with coworkers in a respectful and empathetic manner.
  • Fundamentally curious and motivated my first principles
  • U.S. Person status is required as this position needs to access export-controlled data.
     
Preferred Qualifications 
  • Experience with taking an inverter from concept to production in automotive or aerospace.
  • Experience with DO-160G / DO-254 / FAA Part 33 qualification.
  • Experience with EMI noise mitigation and testing.
  • Understanding of Field Oriented Control and PMSMs.
  • SolidWorks proficient.
     
Salary Range: $100,000 - $160,000 USD

Company Benefits
  • Employee equity incentive plan
  • Health insurance: medical, vision, dental, short-term disability, and life
  • Gym membership stipend
  • Flexible hours (deliverable-based goals)
  • Flexible-time off (just need manager approval)
  • Continuing professional education benefit
  • Mental health coverage
  • Relocation package
  • Epic/IKON Ski & Snowboard Pass 
  • Bi-weekly company happy hours

THE COMPANY:

H3X Technologies is a U.S.-based manufacturer of electric motors for sustainable aviation, marine, industrial, and defense applications. 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. This high performance is enabled by novel scalable core technology and proprietary manufacturing processes for motor stacking, winding, and assembly. The design, manufacturing, and testing of their products is done in-house at their headquarters in Louisville, Colorado.

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. H3X takes pride in their multidisciplinary approach, relentless dedication, high capital efficiency, and Skunkworks-style execution.

H3X has raised over $30M with backing from top VC firms and strategic firms, including Lockheed Martin, Hanwha, Y Combinator, Cubit Capital, Metaplanet, TechNexus, and Liquid 2 Ventures.

H3X is poised to become the world’s leading supplier of advanced electric motors by 2030 to drive deep decarbonization in aviation, marine, and heavy industrial applications and unlock next-generation electrified defense technology to strengthen national security.

H3X is an equal opportunity-affirmative action employer and considers all qualified applicants for employment based on business needs, job requirements and individual qualifications, without regard to race, color, religion, sex, age, disability, sexual orientation, gender identity or expression, marital status, past or present military service or any other status protected by the laws or regulations in the locations where we operate.

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