1st round: non-technical phone interview. This consists on a 20min Skype chat with HR; nothing technical, general questions about personality, and what So1 does. 2nd round: home assignment I received a home assignment on predicting customer behavior. One part is on theoretical questions regarding mathematical functions relevant to the use case, while the other part is a coding assignment. You have 5-7 days to return your solution. HR said that it should take 8 hours; in my case that was completely unrealistic; at least 25 hours were needed to finish the task (note: I have 3 years experience, and later received an offer from a Fortune500 company). I think it is not fair that they ask such a big commitment to candidates (working 4 days for free!) for the home assignment; this seems a strategy to have "consulting work" for free. After HR receive the solution, they forward it to the Software engineering/Machine learning team. Then than decide if they want to schedule a remote technical interview. If you pass that, you will have an half-a-day onsite. I did not pass the home assignment task.