I applied through university. The process took 3 weeks. I interviewed at Opex Analytics (Chicago, IL) in Nov 2017
Interview
I had a nice talk with them at campus career fair which would be similar to behavior interview. Then they scheduled a tech interview through skype. After which there was a case study running for 2 weeks which was very hard, and I did not pass that. If passed, they would ask for an onsite interview.