I solved a generic HackerRank problem and achieved a perfect score.

Pure contacted me to schedule a phone interview. They were upset to hear I was already negotiating salary with another company and offered to fast-track my interview process. They did not disappoint.

I had a one-hour phone screen with an enthusiastic engineer about C++. It wasn't just a conversation, but a real, in-depth reasoning probe.

A few days later, I was on-site in Mountain View. I had four more one-hour technical challenges.

These varied from "implement this algorithm" to "let's talk about return values."

I was completely unprepared in that I didn't try to find out the questions in advance, but the problems were fun, and the interviewers were strong advocates for the company.

A final interview was set up with the hiring manager, who made himself available to answer any questions.

In between, a couple of engineers took me to lunch – no grading or questions.

Several basic "implement a function to do this" challenges, followed up by requesting modifications to make the problem more interesting.