The Staff Firmware DVT Engineer will be responsible for developing test strategies and plans to ensure Enphase's inverter firmware functions according to engineering requirements and design specifications. This includes developing and executing test strategies to ensure the safety and optimal functionality of solar microinverters, designing and implementing automated test systems using Python and Ruby, collaborating with hardware and firmware engineers, and using various lab equipment for testing. The engineer will also participate in project planning and train new members of the technical staff. This role requires deep knowledge of worldwide standards and advanced grid functions.