Contacted by a recruiter. Talked to the founder to learn more about the company. Completed an online quiz, followed by a phone screen, and then an internal interview.

Unlike many other interviews, where you spend a lot of time chatting about what you did and what you'd like to do, this interview focused entirely on coding skills. It was refreshing, though I'm glad I had some previous interviews at other companies to practice coding on a whiteboard.

I felt like everyone in the interviews was hoping I'd find the solution – nobody was rooting for me to fail. They offered nudges when I invariably fell off track.

Take the time to check your work with examples; it won't count against you. It wouldn't hurt to practice doing coding problems on a whiteboard at home.

The interview process is over-selective; Pure probably says no to candidates who would be valuable contributors.

A tricky problem relating to figuring out the value of a counter in the presence of race conditions.