Hard but interesting. Had to go through 1 HM round, 2 coding rounds and 2 systems design rounds. Coding round was hit counter, and message recommendation system. The System design rounds were a bit challenging.

For the technical rounds, I was asked leetcode style questions. Need to practice Data structures and algorithms in order to do well on the interviews. It's important to explain the code as you go along and clarfiy any questions with the interviewer.