Pretty standard process, first a phone screening with the recruiter, a video call with the CTO, a live technical challenge, then a series of behavioral interviews. The technical challenge wasn't hard but it wasn't simple. I actually didn't even finish it but I think explaining the solution was enough to get through to the next round.
While I didn't get an offer in the end, I really enjoyed my interview there. Everyone I talked to was really friendly and seemed passionate about working. The only thing I didn't enjoy was how long the entire process was. It was over a month of interviews but they were hiring for many roles at the time so I imagine they were just overwhelmed.