Two round interview. One round of Technical. There they ask your core domain knowledge. And one round of Manager level interview. HR round is also included in this second round.
I applied through a staffing agency. The process took 2 weeks. I interviewed at SastaSundar (Calcutta) in Mar 2015
Interview
It took 14 days to get hired after interview. And process took 3 days to get offer letter. Experience was good. Not tough and interview took for 30 mins. That's it. Got job in 15 days.