Hardware Test Engineer

Hardware Test Engineers at Lunar Energy play a critical role in helping our engineering team decide whether our home energy products are ready to ship, and own the evidence behind that call. You'll design and automate the test stands that collect critical product performance data and analyze that data to work out the "so what." An ideal candidate is curious, hands-on, and comfortable working across electrical, mechanical, thermal, and software disciplines. Lunar Energy was founded to transition homes to 100% clean energy, making our electricity greener, our air cleaner and our energy more safe, secure and reliable for all. We're a fast-growing, global company building the world's best clean energy products to electrify all homes and connect communities to form clean, resilient virtual power plants.

Responsibilities

Be a critical part of validating power converters (inverters, DC-DC converters, solar optimizers) and battery systems end to end: test planning, test stand development, execution, data analysis, failure analysis, and reporting; Help develop test specifications that reflect representative field conditions and translate field data, product behavior, and known failure modes into stress profiles; Develop detailed functional test plans balancing thoroughness against scalability across large sample sizes; Design and develop custom test stands for electrical, thermal, and mechanical testing; Define test stand architecture, specify equipment and instrumentation, and work with technicians to design and fabricate the stands; Write Python test software to automate testing and process large datasets; Continuously improve test infrastructure, from software tools to custom test equipment; Help drive failure analysis for test failures and support root cause analysis for field failures; Analyze test data and FA results and determine the next critical piece of data or experiment to prove or disprove a failure hypothesis; Document and communicate test results to cross-functional teams with conclusions, limitations, confidence levels, and engineering recommendations; Work alongside a cross-functional team to understand how design and process changes affect reliability and the validation strategy

Requirements

Bachelor's degree in electrical engineering, mechanical engineering, or engineering physics; Strong sense of curiosity and ownership, ability to work in a dynamic and fast paced environment; Strong engineering fundamentals in one or more of: electronics/circuit analysis, heat and mass transfer, statics/mechanics of materials; Experience with electrical test equipment (power supplies, data acquisition systems) and standard diagnostic tools (multimeters, oscilloscopes); Python or equivalent programming experience

Nice to have

Bachelor's degree concentration in mechatronics/robotics; Experience with object-oriented programming, state machines, and test automation; Basic mechanical design or CAD experience; Experience testing power electronics or battery systems

Benefits

Opportunity to become a Lunar shareholder through equity and employee stock program; Medical, dental, and vision insurance for employees and dependents; Flexible Paid Time Off plus 10 paid holidays; Tax deferred 401(k) plan; Paid parental leave for all full time employees, including 12 weeks for the birthing mother and 6 weeks for the non-birthing parent; Subsidized EV charging and pre-tax commuter benefits