USD 130000–153000/yr

Senior Electrical Engineer - Power Electronics

EngineeringElectrical Engineer
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Overview

Company Overview Mainspring Energy is revolutionizing power generation with the world’s most flexible and adaptable local power generation technology, the Mainspring Linear Generator. Commercial,

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EngineeringElectrical Engineer

Mainspring Energy is revolutionizing power generation with the world’s most flexible and adaptable local power generation technology, the Mainspring Linear Generator. Commercial, industrial, and utility leaders are choosing Mainspring over traditional options like engines, turbines, and fuel cells to quickly and reliably deliver local power for EV charging, commercial facilities, data centers, and grid-scale operations. 

The Mainspring Linear Generator is fuel flexible, ramps up and down to meet demand, and utilizes a flameless reaction with near-zero NOx emissions. Backed by top-tier investors including Khosla Ventures, Bill Gates, American Electric Power, Lightrock, and General Catalyst Mainspring designs, manufactures and delivers its products to customers across the U.S. today, and we’re quickly scaling for international expansion.

Inspired by our vision of the affordable, reliable, net-zero carbon grid, Mainspring is rapidly expanding within the $816B global electricity equipment market, and we’re hiring the best talent to meet growing customer demand around the globe. We welcome a broad range of backgrounds, experiences, and talents to bring fresh perspectives and ongoing innovation to our customers.

We are looking to build relationships with people who share our values:

Pragmatic Optimism. Building a new category of world-class power generation requires the optimism of ambition and creativity, balanced with practicality to solve problems efficiently. The challenges that arise are opportunities for growth.

Excellence without Ego. We bring expertise and commitment to creating the best customer experience, from sales to deployment and service, just as we apply deep technical rigor to building and delivering world-class products. We strive for excellence and behave as leaders with the humility to acknowledge our challenges, both collectively and as individual contributors.

Proactive Collaboration. The integration and cross-disciplinary nature of Mainspring’s business requires intentionally seeking out others who bring different skills, perspectives, and priorities. Our culture of inclusion and respect extends beyond our team to interactions with our partners and customers.

More information can be found at www.mainspringenergy.com


The technology that powers Mainspring’s Linear Generator is unlike any other generator technology on the market. The Linear Generator relies on innovative electrical power and control hardware systems to achieve its best-in-class efficiency while meeting the world’s strictest emissions requirements. These electrical hardware systems are designed by a talented team of electrical engineers that own hardware design from initial concept through test and manufacturing.

We have a high impact opportunity for a power electronics engineer to shape the future of the Linear Generator’s power electronics systems.

  • Design custom power electronics hardware that enables key functions of our Linear Generator
  • Bring-up, validate, and qualify your power electronics designs
  • Troubleshoot complex hardware issues that arise in the test lab, production floor, and fielded units
  • Collaborate with the new production introduction team and external suppliers to improve designs for manufacturability and testability
  • Partner with reliability engineers to further drive up electrical hardware reliability
  • Serve as an expert on the hardware systems that you own
  • Bachelor’s degree, or higher, in Electrical Engineering
  • 5 years of experience developing power electronics technologies
  • Excellent electronics design fundamentals; ability to take concept level design details, select components, and produce a schematic
  • Examples of taking ownership of a power electronics design project
  • Circuit board design experience
  • Familiar with schematic capture and power converter circuit modeling/simulation tools
  • Knowledge of power electronics control theory
  • Proficiency with EE tools (Oscilloscopes, Power Analyzers, Network Analyzers, Signal Generators etc.)
  • Experience with power semiconductor selection, gate drive, and protection circuit design
  • Proven ability to work independently on an electronics design project
  • Clear verbal and written communication skills
  • A passion for hands-on hardware development
  • A “collaborate-first” mindset and have successfully communicated across a range of teams and personalities
  • Experience designing high voltage (480VAC or 800VDC range) systems 
  • Experience designing kW-level power electronics
  • Experience in the full hardware development life cycle, from requirements development to manufacturing support
  • Experience working at a startup or rapid development environment
  • Experience with Altium
  • Location & Eligibility

    Where is the job
    Menlo Park, United States
    Hybrid — some on-site time required
    Who can apply
    US
    Listed under
    United States

    Listing Details

    Posted
    April 7, 2026
    First seen
    April 9, 2026
    Last seen
    May 5, 2026

    Posting Health

    Days active
    26
    Repost count
    0
    Trust Level
    44%
    Scored at
    May 6, 2026

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    Senior Electrical Engineer - Power ElectronicsUSD 130000–153000