About Rain Tree Photonics At Rain Tree Photonics, we are building next-generation optical engines for co-packaged optics (CPO) and near-packaged optics (NPO) to break the bandwidth and power bottlenecks in AI infrastructure. Our silicon photonic ICs power 200G/lane and beyond interconnects, enabling scalable, energy-efficient connectivity for AI data centers. Role Overview Hands-on contributor focused on characterization, test execution, and lab infrastructure. Roles & Responsibilities Execute device and PIC characterization (EO, OE, OO) at chip and wafer level. Set up and run high-speed measurements (bandwidth, BER, eye diagrams, etc.). Develop and maintain test automation scripts and measurement routines using LabVIEW and/or Python. Support wafer probing, optical alignment, and test setup bring-up. Troubleshoot and debug test setups and measurement issues. Analyze data and provide feedback to design and process teams. Support die sorting and yield data collection. Assist in transitio...