A total of two rounds of interviews. The first round was a talk with the CEO of the company with Generic questions about your background. The second round was an on-site interview which lasted about 2-2.5 hours. The panel had about 6 people interviewing at different intervals. Being thorough on your previous work experiences helps. The team working there seemed very knowledgeable. Also, P.S. have an energy drink or some food to eat before entering. You might need it to talk a lot.