Lead Test Engineer

Lightmatter•Mountain View, CA

9h•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! As a Lead Photonics Engineer you will serve as a technical authority and mentor, driving engineering excellence and fostering the technical growth of a team of test engineers. In this role, you will architect cutting-edge test concepts and platforms early in the design phase, collaborating closely with architecture and design teams to validate technology models. You will oversee the end-to-end definition, development, and execution of complex wafer, package, and system-level tests, while directing test software development and establishing code-review best practices. Leveraging your multiple years of industry experience and exceptional leadership skills, you will manage vital vendor relationships, act as a cross-functional liaison between silicon, platform, and reliability teams, and partner with OSATs to refine testing for high-volume manufacturing.

Requirements

Bachelor’s in Photonics, Physics, Electrical Engineering, or a related field
10+ years of proven experience in silicon photonics test development, including demonstrated leadership or team lead experience
Proven track record of mentoring and developing engineers, with the ability to set technical direction and elevate team capability
Proven industrial experience in supporting new product introduction and volume production
Exceptional communication and leadership skills, with the ability to convey complex technical concepts to both technical and non-technical stakeholders
Ability to influence across teams and organizational boundaries, driving alignment and accountability without direct authority where needed

Responsibilities

Mentor a team of test engineers, fostering technical growth, setting performance expectations, and driving a culture of engineering excellence across test development disciplines.
Serve as a technical authority by working directly with architecture and design teams to understand the technology and conceptualize characterization and test techniques targeting feedback for design model validations.
Architect and champion test concepts, test platforms, design for test rules, and provide strategic feedback early during the technology concept phase.
Own and drive the creation of detailed test plan documentation, ensuring timely execution and cross-functional alignment.
Lead the definition, development, and setup of wafer, package, and system level tests for Lightmatter silicon photonics products, guiding junior engineers through complex test challenges.
Direct and oversee test software development to enable test execution, data analysis, and parameter extraction — including code reviews and best practice standards for the team.
Guide vendor relationships to specify and procure test equipment, mentoring team members in vendor evaluation and negotiation.
Train and coach engineers in the setup and operation of optical equipment such as tunable lasers, power meters, polarization synthesizers, OBR/OVA, and high-speed test equipment.
Act as a bridge and technical liaison between silicon and platform validation teams, driving alignment and closing gaps across organizations.
Lead collaboration with OSAT teams to define, validate, and refine test techniques for high volume manufacturing, with accountability for team deliverables.
Partner with the reliability team for pre and post-stress test needs, delegating and developing team capability in this space.
Champion continuous learning within the team by staying current with the latest developments in Silicon Photonics technology and testability, and disseminating knowledge broadly.