Mainspring Energy · 17 hours ago
Electrical Engineer, Inverter Systems Engineer - Senior to Staff
Menlo Park, CA
Full-time
Onsite
Senior Level, Lead/Staff
$130K/yr - $185K/yr
5+ years expMainspring Energy is revolutionizing power generation with its innovative Linear Generator technology. The electrical engineer will be responsible for the integration and performance of inverters within the Linear Generator System, ensuring efficient power delivery and system stability.
EnergyRenewable EnergyClean EnergyOil and Gas
Responsibilities
Own inverter integration into Mainspring’s Linear Generator System, including electrical interfaces, control interfaces, configuration, and cooling constraints
Lead the troubleshooting and root cause analysis of complex hardware issues arising in the field, lab, or during testing of grid forming and grid following inverters and AC power systems
Configure and tune inverter parameters for stable operation across grid-forming and grid-following modes
Design and execute lab and system-level test plans to validate inverter performance, protection behavior, and system stability
Analyze AC power waveforms, power quality, and fault behavior to diagnose system issues
Perform critical design reviews and collaborate cross-functionally with mechanical, thermal, controls, test engineering and software engineers to ensure holistic system performance and manufacturability
Qualification
Required
Bachelor's or Master's degree in Electrical Engineering or a related field
5+ [Senior] or 8+ [Staff] years of hands-on experience working with power inverters or power conversion systems
Strong troubleshooting skills with AC power systems, including waveform analysis, fault behavior, and system stability
Hands-on experience using an oscilloscope, multimeter and other test instruments to measure electrical parameters such as voltage, current, frequency
Comfort working on high voltage systems (400-800 Vac, up to 1500Vdc)
The ability to work independently and own complex technical problems from initial identification through final resolution
A 'collaborate-first' mindset and ability to communicate across a range of disciplines and personalities
Preferred
Demonstrated experience in the development, deployment, or optimization of grid-scale energy projects
Proven expertise in the design, integration, or testing of high-voltage battery systems, including comprehensive knowledge of BMS operation and critical parameters
Direct experience working with SEL relays for protection and control in power systems
Benefits
Pre-IPO stock options
Benefits
Company
Mainspring Energy
Mainspring Energy provides power generation technology using linear generators for clean energy.
201-500 employees
H1B Sponsorship
Mainspring Energy has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (40)
2024 (23)
2023 (13)
2022 (12)
2021 (6)
Funding
Current Stage
Late StageTotal Funding
$813MKey Investors
General CatalystUS Department of EnergyBloombergNEF
2025-04-14Series F· $258M
2024-10-22Grant· $87M
2023-04-17Grant
Leadership Team
Shannon Miller
CEO and Founder
Adam Simpson
CCO and Founder
Recent News
Crunchbase News
2025-12-17
Company data provided by crunchbase