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Role overview
Job description
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 role We are hiring a Physical Design Timing Engineer to help drive bac
…About this listing
- Source: Lightmatter's official careers site (via Greenhouse) · last confirmed on the source 27 Oct 2026
- Posted 4 Nov 2025
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What they are looking for
Skills & requirements
Qualification
Bachelor’s degree in Electrical Engineering or Computer engineering 12 years of Physical Design experience, with a minimum of 5 years hands-on experience in ASIC STA and timing constraints development, timing closure with Cadence or Synopsys tools Experience in driving timing closure by effectively managing on-chip variation derates, optimizing multi-mode multi-corner constraints, and implementing robust clock tree building strategies Well versed with scripting languages like TCL and Python, PERL, or Shell Strong problem solving skills with attention to every technical aspect Be a strong team player with clear and precise communication skills Preferred
Department · Photonics & Silicon Engineering
Hiring company
Lightmatter
Rethinking the limits of AI, Lightmatter merges photonics and computing to build a future where speed, efficiency, and intelligence converge.
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