About the role
Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet. We're hiring a Test Engineer to own day-to-day operation of the solar simulator and lead the characterization and validation testing that feeds directly into our product development. This is a hands-on role for someone who likes working with real hardware, high-flux optics, and high-temperature systems — and who gets energized by the fact that the data they generate actually drives design decisions. This position is based in Miami, FL. If selected, relocation to Miami, FL is required. Exowatt provides relocation assistance. \n Key
Responsibilities Plan, set up, and execute test campaigns on the solar simulator, including thermal receiver characterization, material testing, and sub-system validation Design and build test fixtures, instrumentation setups, and data acquisition systems to capture high-quality experimental data Operate and maintain the simulator and supporting lab infrastructure — lamp arrays, optics, cooling, controls, and safety systems Perform flux mapping, spectral characterization, and calibration to ensure test conditions are well-understood and repeatable Instrument test articles with thermocouples, pyrometers, flow meters, flux sensors, and related diagnostics Develop data acquisition and control scripts (LabVIEW, Python, or similar) and automate repetitive test sequences Analyze test data, identify anomalies, and communicate results clearly to R&D, engineering, and leadership stakeholders Partner closely with design engineers to translate test findings into design improvements Write test plans, procedures, and reports; maintain rigorous records of configurations, calibrations, and results Enforce and continuously improve lab safety practices for high-flux, high-temperature, and high-voltage work Support troubleshooting and root-cause investigations on prototype hardware Required