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Silicon Roles

Photonics Characterization Intern & New Grad

Apply on Lightmatter’s site →
First seen on this site 2026-09-11, open 15 days.
Posted 2026-09-15 · read from greenhouse

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 Photonics & Silicon Engineering team's core function is the design and development of Lightmatter's photonic processors and interconnects using light instead of electrical signals for computation and communication. They specialize in silicon photonics fabricating advanced optical components directly onto a silicon base to deliver chips and lasers with superior speed, low power and higher overall performance.