I had an initial Skype interview, and then the one day onsite project with report at the end of day. The project seems quite domain specific at first sight, but I imagine they're not looking for domain specific skills but overall data science / machine learning skills, so no need to worry if you're not familiar with the property of the data. The entire process goes very quick and the people I met are quite nice, so even though I didn't get an offer in the end there's no bad feelings.

I had one round of phone interview, next Skype interview and then the day long project which they I read in earlier posts. I was given a 6 hour window to complete and I completed in approx 4 hours. I answered all their questions and overall I thought I gave my best interview. However, today I receive email saying I wasn't best fit. This is not a specific answer after coming this far in interview process. I should have read the reviews and not apply to this position. This is total BS. Waste of time and energy.