First, you have a call with a very nice recruiter. They really invest a lot in helping you prepare for the interviews. They want you to know what is expected of you and succeed. First thing is an onsite with a medium-level LeetCode question. Then comes the onsite with 5 interviews: 2 problem-solving, 1 behavioral, 1 system design, and 1 ML design. All of the interviewers, without exception, were very nice and respectful. Facebook will send you material to arrive well-prepared for the interview day. The reason why my my overall experience was negative is because: 1. The emphasis they put on system design. Vast majority of people in ML/Data science don't know these things and don't design web crawlers or login systems. Candidates are expected to prepare especially for something they will unlikely be using at Facebook and no other place in the industry will ask them in an interview. I was rejected mainly because of this interview (not my opinion, I was told by the recruiter). 2. One of the problem-solving interviews was extremely unprofessional. The interviewer and I were first talking about the initial "easy" solution, and mine and his ideas were different. It took me some time to convince him my idea was correct, and then we invested more time in his "bruteforce" solution only to come up to the conclusion his algorithm to the question he was asking was wrong. All of this debate took about half of the coding time, throwing the entire process into a race to come up with a good solution + coding. While I did get some help (while under pressure because of the beginning of the interview), I was able to solve the question correctly. In the feedback conversation, I understood this interview went so-so. I was eventually rejected because of the final outcome of these two interviews (the rest went well).

NDA.