Physical Design, Intern (Summer 2027)

Lightmatter·Boston, MA·Posted 13 November 2026

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About the role

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! About this job This team is responsible for defining and implementing the flow and methodology for the digital physical design of Lightmatter’s chips. We interface with multiple teams and utilize industry best practices to develop flows and methodologies which enable the physical design team to design and implement chips, while optimizing power, performance, and area.…

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