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Senior Technical Writer

Lightmatter - Boston, MA; Mountain View, CA; Toronto, ON

Posted May 18, 2026

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About this role

Senior Technical Writer Boston, MA; Mountain View, CA; Toronto, ON 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, Passageā„¢, 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 Role We are a small, highly technical writing team embedded in the Product org at Lightmatter. We own all customer-facing technical content for our hardware and software products - giving engineers and researchers at the leading edge of AI and high-performance computing everything they need to get up and running fast. Responsibilities As a Senior Technical Writer, you will be key in defining the voice and structure of Lightmatter's customer-facing content. Your responsibilities will include: - Lead technical writing activities for critical customer-facing product content, including hardware and software documentation for silicon photonics products such as data sheets, user guides, API documentation, release notes, and product briefs. - Drive content strategy, governance, and quality standards across

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