Principal Product Engineer

Lightmatter•Mountain View, CA

2d•$226,000 - $262,500•Hybrid

About The Position

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

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

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