Principal Product Engineer

<div class="content-intro"><p>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.</p> <p>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!</p> <p>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.</p> <p>Lightmatter is (re)inventing the future of computing with light!</p></div><p>&nbsp;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 &amp; 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.</p> <p>&nbsp;</p> <ul> <li>Strategic Ownership: Own the product's success by managing yield and quality indicators from first silicon to high-volume manufacturing (HVM).</li> <li>Manufacturing Excellence: Define manufacturing and test strategies, including DFT implementation, test hardware specs, and test program creation.</li> <li>Yield &amp; Cost Optimization: Drive continuous improvement in quality, yield, and cost by reducing test time, eliminating test sockets, closing test holes (DPM reduction), and increasing yield through root cause analysis with cross-functional teams (design, fab, packaging).</li> <li>Hands on leadership: Debug test, yield, and power/performance issues.</li> <li>Guiding Light: Lead multi-disciplinary teams (Design, Foundry, Packaging, Supply Chain, etc.) to resolve product issues and continuously improve team tools and methods.</li> </ul> <p>&nbsp;</p> <p>Qualifications</p> <ul> <li>Master’s in Computer Science,Electrical Engineering, Physics, Material Science or a related field</li> <li>A