Lead root cause analysis for escalated issues involving high power electronics, control logic, and embedded software. Troubleshoot system level problems across PCS, BMS, and control units. Diagnose integration issues with cloud platforms, EMS controllers, and third-party systems via LAN or Modbus. Serve as main technical bridge between European support teams and global R&D for ESS topics. Monitor ESS fleet performance to identify systemic issues early and prevent escalations. Analyse support data to uncover recurring faults, trends, and improvement opportunities. Act as ESS Subject Matter Expert by developing and maintaining technical documentation.