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Mainspring Energy

Onsite linear generators for scalable power

Senior Electrical Engineer - Power Electronics

Power Systems EngineeringConfirmed live in the last 24 hours
Full-timeMenlo Park, CA, USA$147k - $173k /yr

About the Job

Requirements

  • A Bachelor's degree or higher in Electrical Engineering is required.
  • At least 5 years of experience developing power electronics technologies is required.
  • Strong electronics design fundamentals are required, including the ability to select components and produce a schematic from concept-level design details.
  • Experience taking ownership of a power electronics design project is required.
  • Circuit board design experience is required.
  • Familiarity with schematic capture and power converter circuit modeling and simulation tools is required.
  • Knowledge of power electronics control theory is required.
  • Proficiency with electrical engineering tools, including oscilloscopes, power analyzers, network analyzers, and signal generators, is required.
  • Experience with power semiconductor selection, gate drive, and protection circuit design is required.
  • The ability to work independently on an electronics design project is required.
  • Clear verbal and written communication skills are required.
  • Hands-on hardware development experience is required.
  • The ability to collaborate successfully across teams and with people with varied backgrounds and working styles is required.

Responsibilities

  • Design custom power electronics hardware that enables key functions of the Linear Generator.
  • Bring up, validate, and qualify power electronics designs.
  • Troubleshoot complex hardware issues 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 improve electrical hardware reliability.
  • Serve as an expert on the hardware systems owned by the role.

Desired Qualifications

  • Experience designing high-voltage systems in the 480 VAC or 800 VDC range.
  • Experience designing kilowatt-level power electronics.
  • Experience across the full hardware development life cycle, from requirements development through manufacturing support.
  • Experience working at a startup or in a rapid-development environment.
  • Experience with Altium.

About the Company

Mainspring Energy

Onsite linear generators for scalable power

Mainspring Energy designs and ships onsite linear generators that produce electricity for commercial and industrial customers, data centers, utilities, and microgrids. The kit uses a straight-line motion that is converted into electric current by magnets moving through copper coils, driven by a flameless, low-temperature air-and-fuel reaction with only two moving parts and an oil-free air-bearing. The system is fuel-flexible, handling natural gas, biogas, hydrogen, ammonia, and propane, and it scales from about 250 kW to more than 100 MW, with near-zero NOx and no after-treatment required. The company sells power as a service, enabling installations with no upfront cost and ongoing payments based on energy use, aiming to lower operating costs and increase energy resilience for its customers.

Company size
501-1,000
Company stage
Series F
Total funding
$813M
Headquarters
Menlo Park, CA
Founded
2010

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