I had a 30 minute intro call with the recruiter. It wasn't particularly probing. He told me I was in an accelerated interview track, so they would try to get all of the interviews done that week.
Then I was scheduled with a backend engineer for a coding exam. The meeting was an hour long and I shared my screen while working to solve a coding problem. The interview was recorded. The interviewer wasn't exactly dropping hints, but would provide feedback. Overall, I felt he was nice.
The following day I received an email telling me I would advance to the next round of interviews and to provide my availability. I was scheduled two hour-long interviews, a system design interview with a staff engineer and then a behavioral interview with a director of engineering. They included a three page PDF of what to expect in the interview. 2.5 pages are dedicated to the system design interview, while there's a few paragraphs about the behavioral. The behavioral interview questions are essentially included, so be sure to come to the interview with answers for them. (I skipped over this with minimal concern, worrying more about the system design interview... in retrospect, would've dedicated some more time to thinking of exactly what and how I would answer those topics).
The system design engineer was helpful enough. It seemed to be mostly a focus on the database design of the system.
The behavioral interview was very terse. "Tell me about a time you..." for an hour while the interviewer typed out mu answers, asking here and there for clarification. The interviewer didn't seem unfriendly, but wasn't particularly conversational.
At the end of the interview (which ran about 10 minutes long), he told me that they hoped to get an answer to me by the following day, since it was an accelerated track. This did not happen. In fact, they took 2 weeks to send me a form rejection email. This was after reaching out directly to the recruiter who scheduled my interview with no response.
I was a little disheartened by being rejected, and by not receiving a response until the day after Christmas, but this appears to be their standard hiring practice.