Senior Electrical Engineer - Power Electronics

Mainspringenergy; Edison (CA); On-site; USD 90,000 - 120,000; Full time

Job summary

Mainspring Energy is seeking a Power Electronics Engineer to design and develop innovative power electronics hardware for their Linear Generators. The role involves troubleshooting complex hardware issues, collaborating with teams to enhance designs for manufacturability, and ensuring high reliability in electrical hardware systems.

The ideal candidate will possess a Bachelor’s degree in Electrical Engineering, have at least 5 years of experience in power electronics, and demonstrate excellent communication skills, a hands-on approach, and a strong collaborative mindset.

Qualifications

• 5 years of experience developing power electronics technologies.
• Experience designing high voltage systems (480VAC or 800VDC range).
• Experience in the full hardware development life cycle.

Responsibilities

• Design custom power electronics hardware.
• Troubleshoot complex hardware issues.
• Collaborate with teams to improve manufacturability.

Skills

Excellent electronics design fundamentals

Circuit board design experience

Power electronics control theory knowledge

Clear verbal and written communication skills

Hands-on hardware development

Collaboration skills

Education

Bachelor’s degree in Electrical Engineering

Tools

Schematic capture tools

Power converter circuit modeling tools

Altium

Oscilloscopes

Power Analyzers

Network Analyzers

Signal Generators

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
• 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

In more traditional words, Mainspring Energy, Inc is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.

This compensation and benefits information is based on Mainspring Energy's estimate as of the date of publication and may be modified in the future. We generally do not negotiate on salary once we have made an offer. The level of pay within the range will depend on a variety of job‑related factors that may include location, relevant prior experience and/or education, or particular skills and expertise. New hires joining the company tend to be paid within the starting base pay range noted above, with opportunities to increase pay over time based on development of additional skills, competencies, and company‑specific knowledge.