I applied online. The process took 1 week. I interviewed at Groupon (Chicago, IL) in July 2019
Interview
There was two round for me one phone screen and one technical round. The technical round was a bit tough. You have to know data structures and algorithms very well.
I applied through a recruiter. The process took 1 week. I interviewed at Groupon (San Jose, CA) in Sept 2016
Interview
1 phone screen if you perform well it is followed by next round phone interviews. First, I received an email from a recruiter to give me an overview of the position, company, and what I could expect from the process. I then had an phone interview with an Android developer from the company.