there are three rounds, the management of this start up company is not that nice. first round two colleagues ask some basic questions from machine learning , sql , big data and so on. then give you a mini project. second interview subitted code, description and slides to them and present the results to another two guys. third interview: one to one with team lead. She didnt ask hash questions and told I was profession and will be offered. After that totally no response. I tried to call hr who contacted me in this long period, and hr lady blocked my phone number ........ so interesting ....................