I can't disclose the question details, but I can say that one of the questions I received was extremely hard.

This is the type of question that basically requires you to have seen it before. Even though, overall, I think I did well in the other interviews, I bombed that question. I believe it was the main reason I didn't get an offer, but I didn't feel bad because I wouldn't have been able to solve it even if I had studied more.

As someone who regularly interviews others from the other side of the table, I don't believe in super hard questions. You might get geniuses or those lucky enough to have encountered them before, but you really end up losing a lot of good candidates.

Another problem was the lunch interview. Yes, lunch is an interview! I didn't know this beforehand, and it was a surprise when I thought I was going to relax and recharge in between interview marathons. I was told that lunch was also used as a behavioral interview. (At first, I thought my lunch buddy was joking.)

The format was awkward at best. The two people eat in turns so that one can answer questions while the other can eat. I suppose it makes sense for them to gather as much data as possible, but I didn't think any other positive data points could save me over the aforementioned tough question. And to compromise a normal lunch is simply a little too cruel.

The people I've met from the interviews all seemed to like working at Snap (of course), but I'm doubtful if I'd want to work there even if I had received an offer.

Having said that, I really enjoyed the design question with the manager. He seemed like a nice and positive guy, who showed genuine passion for his job and appreciation for my work during the interview.

Behavior questions ("tell me about a time"...)