I applied through a recruiter.
They have a very frustrating interview process. After the initial screening, which may or may not happen twice, they have a take-home programming quiz where you're probably going to spend hours on random things like setting up a git repo and a build system, after you create an account on their favorite cloud git service. Then they have an additional interview with some engineer who will totally ignore the programming quiz. Finally, you'll do a day's worth of yet more interviews where you'll talk with more engineers and the founders. Scheduling is a mess, and there is a total disregard for your time. There are other companies that will value you more.
Implement a convolution layer three ways.
The following metrics were computed from 1 interview experience for the Lightmatter Software Engineer role in Boston, Massachusetts.
Lightmatter's interview process for their Software Engineer roles in Boston, Massachusetts is extremely selective, failing the vast majority of engineers.
Candidates reported having very negative feelings for Lightmatter's Software Engineer interview process in Boston, Massachusetts.