Staff High-Speed I/O Test Engineer

Lightmatter·Mountain View, CA·Posted 14 July 2026

Apply with a tailored CV View on Lightmatter's site

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 Role You will be focused on validating and architecting package and system-level test strategies for high-speed I/O interfaces on Lightmatter’s novel product line. In this role, you will be responsible for setting up and executing high-speed electrical characterization, driving link bring-ups, and stress-testing I/Os in system environments. You will work closely with…

This is a summary of the advert. The full description and the application are on Lightmatter's careers site.

Apply faster with Prepper

A version of your CV tailored to this Staff High-Speed I/O Test Engineer role.
A cover letter written from your CV and this advert.
Prepper can fill in Lightmatter's application form and send it once you approve.
The application saved in your tracker, with reminders to follow up.

Start free

More roles at Lightmatter

Prepper is independent and not affiliated with Lightmatter. Roles are listed from the employer's public careers system and removed when they close.