First a phone screen with the recruiter. I wanted to know details about role responsibilities about different data scientist positions, but she was not very forthcoming. She wanted me to pick a role on the phone itself. She was very rushed and rushed me into making a decision on which role I wanted to pursue. They do not allow a phone call with the manager to get a better sense for the role. I find that very odd, considering its the norm in bay area. Not very welcoming and felt like they were doing a favor on me. I have worked previously at one of the tech giants and two other tech startups in the same role. Then I was sent the data science challenge. I found there were some very basic faults in how they define some data features. I have worked on similar problems before. I pointed it out, that making such assumptions can leads to incorrect analysis and hurt the business. I suggested ways to fix the problem. They did not seem to like the fact that I was able to gently point out their mistakes. I would have thought, they would appreciate a honest and respectful feedback, the fact that I could see the problem because of my experience. I think they would rather have candidates make the wrong assumptions and do the analysis. But sorry that is not the way I have been trained. I am glad I found out about their culture before it went any further.