Sr Product Engineer

Lightmatter•Mountain View, CA

25d•$188,000 - $211,000•Hybrid

About The Position

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.

Requirements

Master’s in Computer Science,Electrical Engineering, Physics, Material Science or a related field
A minimum of 5+ years experience in semiconductor industry as a product engineer, with a cumulative of 12 years of relative industry experience
Experience developing DFT strategy
Experience developing test plans
Familiarity with advanced packaging flows
Familiarity with ATE Test area equipment and methodology
Experience partnering with OSATs to develop manufacturing test flows for CMOS or Optical transceiver products
Excellent communication skills with ability to present complex technical information clearly and concisely
Demonstrated ability to influence senior company leadership and partner with vendors and customers
Familiarity with statistical analysis & data acquisition tools such as JMP, Snowflake
Candidates should have capacity to comply with the federally mandated requirements of U.S. export control laws.

Nice To Haves

Experience partnering with a OSAT to develop manufacturing test flows for Co-Packaged Optics technology
Programming or scripting: Python, C, Java, Ruby, SQL, or shell scripting

Responsibilities

Strategic Ownership: Own the product's success by managing yield and quality indicators from first silicon to high-volume manufacturing (HVM).
Manufacturing Excellence: Define manufacturing and test strategies, including DFT implementation, test hardware specs, and test program creation.
Yield & 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).
Hands on leadership: Debug test, yield, and power/performance issues.
Guiding Light: Lead multi-disciplinary teams (Design, Foundry, Packaging, Supply Chain, etc.) to resolve product issues and continuously improve team tools and methods.