I applied online. The process took 3 weeks. I interviewed at Vertex (King of Prussia, PA) in Jan 2018
Interview
The interview process started with a 30 min preliminary phone conversation with 2 of the managers. It then proceeded to an on-site interview lasting 2.5 hours with 3 different teams.
Interview questions [3]
Question 1
Tell us about a time when the customer got really angry.