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Salary: USD 130,000 - 160,000 / annual
Heron Power is building cutting-edge power electronics for grid modernization, focusing on solid-state transformers (SSTs) that connect large-scale renewables, storage, and loads to the grid. As Senior Product Test Engineer for Energy Storage Applications, you will own end-to-end application-specific testing of Heron's SST across three core use cases: AI data center power, utility-scale battery energy storage systems (BESS), and photovoltaic plants.
Your responsibilities span the full testing lifecycle: bringing up hardware in the lab and at pilot sites, writing Python-based test automation to drive test equipment and power converters, and debugging performance against application-specific demands. You'll validate ripple mitigation, backup capability, slew rates, and power-loss profiles for a novel high C-rate battery pack (SuperBBU). You'll support SST and utility-scale BESS integration testing at pilot sites, covering EMS-to-SST communication, black start and grid-forming coordination, charge/discharge cycling, and round-trip efficiency. You'll also support integration testing with commercial off-the-shelf DAS, SCADA, and EMS systems.
You will own Heron's first pilot deployments, reviewing field performance, identifying feature gaps, and collaborating with software and firmware teams to turn findings into product improvements. You'll safely operate power converters, chillers, contactors, and protection hardware, and set up cabling, instrumentation, and data acquisition for high-power test runs.
Must-have qualifications: 5+ years hands-on experience in power electronics, energy storage, EV, grid, or comparable hardware-intensive environments. Strong grasp of DC circuit fundamentals (resonances, parasitics, slew rates, inductive spikes) with ability to correlate test data to simulation. Strong scripting and test-automation skills. Working knowledge of power conversion and battery systems (inverters, converters, BMS, DC pre-charge, contactors, protection, thermal loops). Comfort with lab instrumentation (oscilloscopes, power analyzers, DAQ) and comms protocols (CAN, Modbus TCP). Scrappy mindset to execute under constraints.
Nice-to-haves: experience with solid-state transformers or grid-forming inverters, utility-scale BESS commissioning or EMS integration, systems-level testing of power electronics or energy storage products, hands-on circuit and system simulation (LTspice, Simscape, PLECS).
