# Senior Product Performance Engineer at Mainspring Energy

- Company: Mainspring Energy
- What the company does: Local power generation for data centers, utilities, industrial & enterprise applications. Fuel-flexible, fast to deploy, high-efficiency, low NOx power. Backed by General Catalyst and Khosla.
- Company website: https://www.mainspringenergy.com/
- Type: Startups
- Level: Senior
- Location: Menlo Park, CA
- Work setup: On-site
- Pay: $130K to $153K base salary per year (USD)
- Posted: 2026-10-10
- Apply by: 2026-11-24
- Apply: https://jobs.lever.co/mainspringenergy/ee22f369-a04a-4785-93bc-447cd32ec00f?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/mainspring-energy-senior-product-performance-engineer/

## About the role

Mainspring is seeking a rigorous, curious, and highly motivated Product Performance Engineer to own the performance of our Linear Generator. Reporting directly to the VP of Test Engineering, you will combine hands-on experimental work with in-depth data analysis to characterize, understand, and improve all aspects of the Linear Generators performance with emphasis on power output, efficiency, and emissions profiles. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- Recent PhD, or Master's degree with at least 5 years of applicable industry or research experience in mechanical engineering, aerospace engineering, chemical engineering, physics, or a related field
- Deep expertise in thermodynamics/power generation, with the ability to apply it to real hardware and experimental data
- Excellent data analysis skills in Python (e.g., pandas, NumPy, SciPy), including working with large, noisy experimental datasets
- Hands-on experience designing and executing experiments involving instrumentation and emissions testing
- Strong communicator with a collaborative mindset, comfortable presenting findings to leadership and working across teams
- Strong organizational skills and the ability to manage multiple priorities against deadlines

Tags: Product Testing

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/mainspring-energy-senior-product-performance-engineer/