The whole process took around a month. Their recruiter reached out to me and arranged a call with one of the data scientists on the team, where the questions were about my past projects mainly. Then the take home that was due in 48 hours, and then the final round that was 3 hours of SQL, Stat, Machine Learning, and metric definition, which was online due to the Coronavirus situation. Overall the team was super friendly, smart and to the point, the recruiter was very responsive and the take-home was really challenging but at the same time super interesting. I would suggest watching Alex Schultz's video on youtube for some of the metrics. (churn, retention,etc)