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Staff Electrical Engineer - Power Electronics

About Mainspring

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Mainspringenergy Source published Sep 20, 2026 Verified 11 hours ago
✓ 100% verification score · Source: mainspringenergy (lever) · Always confirm final requirements on the original source.
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Overview

About Mainspring

Full job description

About Mainspring Mainspring Energy manufactures and delivers fuel-flexible, low-emissions local power solutions that rapidly add new capacity and deliver reliable, affordable, and sustainable electric power. The company began commercial shipments of its Mainspring Linear Generators in 2020 and today has hundreds of megawatts in advanced development and field operations for leading Fortune 500 companies, data centers, and utilities. Mainspring also partners with global energy leaders including AEP, NextEra Energy Resources, Schneider Electric, and more. The core values that ground our work, guide our decisions, and connect us together: Pragmatic Optimism Excellence without Ego Proactive Collaboration

Job Overview 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

8 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

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