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Mainspring Energy

R&D Test Engineer

Compensation
$108.8K–$123.6K / yr
Location
Menlo Park, CA, US
Arrangement
On-site
Employment type
Other
Posted
21 August 2026 (about a month ago)

Checked about a month agoApplications go to the employer, never to RoleSprint

About this role

Job Overview Mainspring is seeking an open-minded, curious, and highly motivated R&D Test Engineer who likes to solve challenging cross-functional problems in both a research and production environment. In this role, you will design and execute tests on the Linear Generator, focusing on new electrical and software changes that improve product capabilities and performance.You will lead critical sub-system and system-level development and validation tests on new releases of our product and gain exposure to the entire system, including electrical and mechanical components, software, and controls. The breadth of this role is perfect for an engineer or researcher who wants to use their advanced experimental and analytical skills in a fast-paced product development environment.

Responsibilities • Perform hands on work and work directly with technicians to troubleshoot, retrofit, and operate our Linear Generator test units

• Collaborate with engineering teams to steer R&D projects by designing and executing experiments that inform product design

• Analyze data, generate reports and communicate results with engineering teams to facilitate learnings and design releases

• Manage test priorities on a daily basis to meet higher level deadlines with a focus on throughput and completing high value studies

• Develop & improve processes and infrastructure to support testing on our next generation products

Qualifications • Master’s degree in electrical engineering, mechanical engineering, physics, or equivalent with 3+ years of applicable experience

• Experience designing and executing tests in an industrial or academic environment, specifically involving instrumentation and data analysis

• Successful communicator, with a collaborative mindset, who will interface across a range of teams and personalities

• Proficiency in programming with Python/ MatLab/ C++ (at least one)

• Strong organizational and project management skills

Work location

  • Menlo Park, CA, US

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About this listing

Advertised by Mainspringenergy and published on Lever, the applicant tracking system they use.

RoleSprint is not the employer and not a recruiter. Applications are made on the employer’s own site and never reach us; what RoleSprint does is help you decide whether a role is worth your time and prepare for it if it is.

Published 21 August 2026, last checked about a month ago. A posting stops being advertised here 90 days after the employer published it, and one the employer takes down is marked closed rather than quietly removed.

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