Principal Product Engineer

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About this role

Principal Product Engineer Mountain View, CA Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world's first 3D-stacked photonics engine, Passage™, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for the most advanced AI and HPC workloads. Lightmatter raised $400 million in its Series D round, reaching a valuation of $4.4 billion. We will continue to accelerate the development of data center photonics and grow every department at Lightmatter! If you're passionate about tackling complex challenges, making an impact, and being an expert in your craft, join our team of brilliant scientists, engineers, and accomplished industry leaders. Lightmatter is (re)inventing the future of computing with light! The Product Engineer role is pivotal to Lightmatter's mission, sitting at the center of product delivery and operational excellence. This position offers a unique opportunity for end-to-end ownership, where you will define the product engineering landscape from the ground up and drive the strategic direction for our hardware portfolio. You will collaborate with cross-functional teams (design, foundry, packaging, test, validation, reliability) to optimize manufacturing flows, improve yield and quality, and reduce costs. The role's focus areas include: optimizing Yield & Quality, implementing DFx principles, and managing the product from initial silicon to high-volume manufacturing (HVM). The core responsibilities are specifically centered on optimizing manufacturing flows, yield Improvement, and Test Point Optimization. - Strategic Ownership: Own the product's success by managing yield and

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