The HR first set up an phone call interview schedule with me, but nobody called me at the participated time. After waiting for 30minutes, I reported this issue to HR, and set up a new schedule with her. Then I got interviewed on phone with Sayantan Mukhopadhyay. He first called me with an anonymous number, with poor connection. Then he changed to other number to call me again. The whole interview lasted for about 30 minutes.