I applied through university. The process took 2 weeks. I interviewed at Susquehanna International Group in Oct 2018
Interview
Two phone screens. I felt like I did well on both of them so I was actually pretty surprised that I didn't make it further in the process, although I am not sure it was a good fit anyway. Perhaps that is why I didn't make it further, because I (objectively) have pretty strong credentials and as I said I thought I did well in the interviews.
Interview questions [1]
Question 1
The first one had some probability questions that weren't too difficult if you know the basics. I think it also had a question about option pricing intuition. The second one involved some questions about the markets and finance.