There should be a total of 4 rounds of interview plus a presentation on case study. I would say the case study is pretty difficult for people who aren't in the payment industry. It took me sometime to understand. It is also a test on how you analyze and present data. I really like everyone I spoke to during the interview process. It is probably my best interview experience so far. Even I didn't make it to the final round, the recruiter still made time to provide me feedback on the phone.