Product Performance Engineer

Mainspring Energy is seeking a Product Performance Engineer to own the performance of its Linear Generator, combining hands-on experimental work with in-depth data analysis to characterize and improve power output, efficiency, and emissions. The role involves identifying performance gaps against internal targets, driving cross-functional efforts to close them, and providing engineering teams with the insights needed to guide design decisions. This position is ideal for an engineer or researcher with deep expertise in thermodynamics and power generation who wants to apply their skills to a first-of-its-kind product in a fast-paced development environment.