Lightmatter, Inc. seeks a Hardware Validation Engineer to design, develop, and build photonic test systems for validating optical interconnect products. You will collaborate with device, hardware, software, and design teams to support end‑to‑end development and validation of photonics components. The role focuses on chip bring‑up, test plans, lab bench setups, and electro‑optic link testing in a hybrid work setting. PhD is a plus; strong scripting and Python/MATLAB skills are valued.