Not great.
I went through a recruiter screen and then an offsite. Both of my interviewers at the onsite seemed like they were being held at gunpoint. The recruiter was extremely uncommunicative.
Object-Oriented Programming stuff, mostly.
The following metrics were computed from 39 interview experiences for the Whatnot Software Engineer role in United States.
Whatnot's interview process for their Software Engineer roles in the United States is fairly selective, failing a large portion of engineers who go through it.
Candidates reported having very good feelings for Whatnot's Software Engineer interview process in United States.