I applied online. The process took 3 days. I interviewed at Groupon (Bengaluru) in Jan 2020
Interview
It was a full day interview on-site. Each interview round was for 1 hour each. First round was a hackerank test followed by a brief discussion of your solutions. Second was a problem solving round. Third is a design round where they ask you to design any popular system.
Interview questions [1]
Question 1
Design a multi-tenant dashboard for million records. Scalability, performance, etc