I applied through college or university. The process took 1+ week. I interviewed at Niki.ai (Noida) in Dec 2016
Interview
They required CGPA above 8.0 thus many students were unable to sit.
The process consisted of 3 rounds.
Round 1. Machine coding round 6 was selected out of 50.
Round 2 and 3 . Basic DS Algorithms questions were asked on IDEONE.
1 was selected, fortunately it was me.