I applied online. The process took 4 weeks. I interviewed at cPanel (Houston, TX) in Jun 2016
Interview
If your CV get selected you will be getting email for the phone round. The phone round is simple. If you are selected you will be called for the face to face round at the Huston office.
Usually small panel (for me it was 2 , later joined by one more guy)
Interview questions [5]
Question 1
Basic linux question like viewing of file ... changing directory .. getting the name of current working dir
f2f : They gave me cpanel page for email config to write some functional test cases. Go ahead lot of demo of cpanel are available .. so have a look and use them for writing test case