There were a few stages. Due to my schedule, it spread out over about a month or so.

Stage 1: A take-home coding challenge done in their tool. This was a fun, basic coding exercise to be done in approximately 30 minutes.

Stage 2: A one-hour Zoom call with an engineer on the team. Again, this was coding live in their tool (works well for interviewing due to multiplayer support).

Stage 3: A virtual "on-site", where you spend a day working on a mini-project with them. The morning was a collaborative design session, and the afternoon was a demo to present your work. This was more fun than many big tech on-sites where you repeat the same interview 4-5 times. It felt more realistic.

Q: Three coding questions of increasing scope, complexity, and length.