Tech interview, tech challenge, final interview. The strangest part of the tech challenge / interview process as a whole was the pseudonymous slack group designed to prevent bias. Everyone had a default profile picture and a random name, so you didn't know who you were interacting with, and they didn't know anything about you. The idea is nice, but the execution was awkward and impersonal. Also they refuse to give any feedback, as a point of policy, on the tech challenge.