About Lightmatter

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.

Position Summary

Senior Physical Design Engineer – implementation of complex digital blocks in advanced process nodes (3nm) to drive timing closure, power integrity, and physical verification for high‑performance ASICs. This role offers a unique opportunity to work alongside world‑class scientists and engineers in defining system optimization and tackling novel photonics challenges.

Responsibilities

• Implement digital blocks from synthesis through physical verification, using indu...