The process was long, the interviewers were mostly professional. An upfront tech screen followed by 2 case interviews (1 technical and 1 business). The final onsite had 3 interviews with lead data scientists. To be honest, I did not think very much of the final round, which was, for a lack of better expression, weird. I did not feel like they asked important data science questions and nor did I feel like they could accurately gauge or cared to gauge a candidate's caliber. I sat down with one who went through my hitherto unread resume with me, awkwardly, focusing on the wrong things. Another interviewer was tired from flying in on a red-eye, and did not seem to care about what I was saying, and claimed he was hungry during the interview and was dying to get to his lunch. I left the interview feeling like it was not a culture fit and I wasn't convinced they were doing interesting work.

The interview consisted of a total of five rounds, and I'm currently at round 4. It started with a code signal online assessment (tested basic knowledge about data cleaning, data filtering, data joining with pandas as well as some simple ML with scikit). Then the first three rounds are technical case interviews. Each round consisted of about 10-15 mins for introductions, and 30-35 mins for a technical case interview, and then about 5 - 10 mins for questions.