Photonics Engineer Intern - Summer 2027

Lightmatter·Boston, MA·Posted 11 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 designing active and passive Silicon Photonics devices and systems that are at the frontier of the technology and core to Lightmatter products. This job will require diving deep into the physics and working principles of all kinds of device designs, creating test plans, and layouts, analyzing data and experiments and creating models.…

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