Groupon

I was contacted through LinkedIn about setting up a phone interview. I expressed my interest but was not contacted until an engineer called me, asking if I was ready to interview. I was not ready but winged it and did well. The engineer then said I

1 phone screen and 4 rounds of onsite interviews. Most questions were about the project, and there were also some algorithm questions. Design a mobile app for college grades. How to make it scalable?

I applied online and received an email a week later asking to schedule an hour-long interview. I was interviewed by a gentleman who appeared least interested in conducting my interview. I was asked to write a simple code, and the interview ended the