Senior Electrical Engineer, Hardware Systems

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, 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

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 technical leadership opportunity for an electrical engineer to shape the future of the Linear Generator’s electrical systems.

• Design critical electrical systems that enable key functions and ever-expanding features of Mainspring’s linear generator

• Work on a wide variety of subsystems and components, including (in no particular order) high voltage batteries, grid-tie inverters, capacitor banks, motor drives, low and high voltage power distribution, safety controllers, and more

• Become an expert on the linear generator electrical system. This involves the hardware designs and the system-level controls that bring the hardware to life

• Be called upon to troubleshoot our most complex system-level problems, and be able to breakdown abstract system-level symptoms to be able to identify which subsystem is the cause of the problem

• Regularly blur the line between operating as an electrical design engineer and a systems engineer. This will involve activities such as defining electrical system requirements, allocating requirements to subsystems, analyzing trade-offs between subsystems, and leading the team to develop robust verification plans

• 5+ years of hands‑on experience designing, developing, and realizing complex electrical systems

• An eagerness to work on a wide variety of assignments

• While you will spend more of your time working at the system‑level, you have the technical expertise…