The interview was fine and the staff were helpful, but the pre-screening challenge was long (10 days given, finished in few days) and then it took them some time to get back to me telling me no offer. What a bummer when I did very good on the interview day overall. A big waste of time.

Many questions: 3 coding exercises (one of them not even solvable in the time allotted, total was 60 mins for all questions), an exercise in algorithm design on the board and big-O analysis, then personal 1-1 interview by a senior engineer.

The most difficult question is to write an algorithm for the 2048 game (shifting, merging/summing) and they wanted it generic. I didn't get enough time to code it through (I even didn't see/play this game before but that doesn't matter since I could figure out the algorithm but no time to code it).