Staff Product Performance Engineer

Job overview

The Staff Product Performance Engineer role is onsite in Menlo Park, CA, with an annual salary range of $156,005–$183,536. Mainspring Energy develops fuel-flexible, low-emissions local power solutions. Reporting to the VP of Test Engineering, the engineer measures and analyzes Linear Generator performance against product requirements. The role turns experimental results into engineering insights and recommendations that help teams improve power output, efficiency, and emissions performance.

What you'll do

• Own measurement and tracking of power, efficiency, and emissions against product requirements
• identify performance gaps and drive cross-functional efforts to address them
• design and execute experiments on Linear Generator test units with technicians and the test team
• build and maintain Python analysis tools and data pipelines
• apply thermodynamic and heat-release analysis
• communicate findings and data-driven recommendations to design engineering teams
• improve test methods, instrumentation, and validation processes.

What we're looking for

Skills & competencies

staff product performance engineer

menlo park ca

mainspring energy

onsite

linear generator

power generation

thermodynamics

python

experimental testing

emissions testing

product performance

$156k–$184k/year

Work arrangement

• Weekend coverage required

Benefits & perks

• Pre-IPO restricted stock units and benefits.

Why this role

Combines hands-on experimental testing with Python-based analysis of large test datasets for a fuel-flexible, low-emissions power product.

About the employer

Mainspring Energy is hiring for this role. Industry: Motor and Generator Manufacturing. Sector: 33.