1st phase was on the phone with HR and a manager. Then face-to-face at company head quarters in Waltham, MA. I was placed in a conf. room and managers called me on the phone from various locations. Only interviewed with the data manager who asked me what questions the other people asked me?

Interview is done in an online mode, 2 technical rounds and 1 technical + hr round. First 2 rounds duration is 50 minutes each. Last round is for 1 hour.