USD 108000–123600/yr

Test Engineer, Product Qualification

United StatesEdison · Menlo ParkSalarymid
EngineeringOtherQa 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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EngineeringOtherQa 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


Our Linear Generator is a sophisticated, automated, and integrated system spanning a wide range of engineering disciplines including thermodynamics, mechanical, electrical, software, and controls. We are looking for a driven, highly motivated Product Qualification Test Engineer to join our test engineering team. 
  • Perform hands-on work and operate our Linear Generator units, working closely with our end of line team
  • Qualify cores, units to be shipped to customers sites in our facility in Menlo Park, and support contract manufacturing
  • Outline and develop testing processes & infrastructure to scale up product qualification tests
  • Generate, analyze and automate data reports on new units, and work with all engineering teams to identify and root cause issues
  • In collaboration with our manufacturing testing team,  participate in the development of new automation processes to enable the scaling up of qualification testing in manufacturing
  • Master’s degree in mechanical engineering, electrical engineering, physics, or equivalent with 3+ years of applicable experience
  • Experience of conducting experimental hardware projects plus if in the context of product qualification or manufacturing test engineering
  • Experience in project management
  • Proficiency in programming in at least one language (e.g. Python, MATLAB)
  • Detail-oriented and comfortable working in a fast-paced environment
  • Enjoy working in interdisciplinary teams
  • Listing Details

    Posted
    March 19, 2026
    First seen
    March 26, 2026
    Last seen
    April 24, 2026

    Posting Health

    Days active
    28
    Repost count
    0
    Trust Level
    42%
    Scored at
    April 24, 2026

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    Test Engineer, Product QualificationUSD 108000–123600