I don't remember everything exactly, but I recall it was a call with a TA first. Then they sent me a HackerRank exercise. After passing that, I think I did another interview or two the same day, and that's as far as I got.

Well, they had me build an API for a call center that made a query to an external API to get a list of contacts, and it had to return one contact at a time that hadn't been called yet.

Afterwards, they asked me more questions about the system, such as whether I would use a relational DB or not, and things like that.