# Senior Software Engineer in Test 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: $135K to $159K base salary per year (USD)
- Posted: 2026-08-24
- Apply by: 2026-10-08
- Apply: https://jobs.lever.co/mainspringenergy/fbd2184c-5c48-4d30-b8a6-8f598af9a768
- Page: https://www.1752.vc/careers/jobs/mainspring-energy-senior-software-engineer-in-test/

## About the role

Do you enjoy diving into building new automation systems and formulating new testing approaches in areas like cloud computing, networking, IoT with real time operating systems, controls, simulations (MIL, SIL, PIL), and algorithms? We combine this technology with our company vision of building a new category of power that is affordable, reliable, and targeting a net-zero carbon grid. This cornucopia of science and technology will be your daily career at Mainspring.

## What they're looking for

- Experience & Education: Bachelor’s degree in Computer Science or a related field with 6+ years of professional experience, or a Master’s degree with 5+ years in an SDET or Software Engineering role
- Engineering Mindset: A driven, self-directed contributor who views test infrastructure as a first-class product, you thrive on architecting scalable, automated systems that increase developer velocity
- Technical Versatility: Strong hands-on experience developing in Python and C++, with the flexibility to navigate and contribute to diverse codebases as the project requires

Tags: On product SW and Sys Engr