Applied through the LinkedIn website and was contacted by a recruiter via email for setting up the initial phone screen. Phone screen was usual, why did you select computer science, tell us about yourself a little, which field I was interested in working so they could select the appropriate team. First round went well, consisted of one coding question and some machine learning concepts. Was contacted a week later and was set up for 2 back to back phone interviews. Second round was similar to the first, a coding question and some more machine learning concepts. Third round was all about complexity and Big O analysis, nothing too hard. Overall, a very good learning experience even though I didn't make it.