There were two phone screens followed by an onsite visit and a take-home exercise in coding/analysis. The onsite rounds were focused on coding and algorithms. Some of the questions were open-ended and you had to define the problem better while trying to understand it at the same time. That was tough, especially considering that the interviewers had spent a bunch of time thinking about these problems. Overall, very interesting problems and all relevant to Lyft's data science projects. All interviewers were very sharp and quite laid-back too. It was great to talk with them, and seemed to be a friendly environment, and I was sold quickly.