I applied through an employee referral. The process took 5 weeks. I interviewed at Groupon (Chicago, IL) in Feb 2015
Interview
Screened by two recruiters. The interview itself consisted of talking briefly with the two recruiters, followed by meeting with 5 people in the department. I met the hiring manager's boss first, then the hiring manager's partner, then the hiring manager, then some senior person in finance, and finally an analyst in the department who administered a SQL test.
Interview questions [1]
Question 1
What would be the best feature to determine how much money a deal will make on Groupon's site?
That was followed shortly by "What would be the best predictor of whether a merchant will run on Groupon?"