Just like any other "tech" interview. The first round was a "Hard" leetcode problem to solve. The interviewer was nice and responsive. It was mainly an issue with the way I approached the problem and didnt get to the optimal solution quick enough. Also one mistake I did was not thinking straight and jst saying the wrong time complexity so that they can correct me, cause I was a little nervous. Never do that! I guess for a SDE3 role its expected to know such a thing instantly.