Recruiter call to ask general questions, why are you interested, previous experience and why do you think you are a good match, followed by phone interview with the director of the team.
I applied online. I interviewed at Susquehanna International Group
Interview
First, I talked with a recruiter. After that, I was invited to a code signal test online assessment. The questions were quite challenging and, in my opinion, impossible to solve without considerable practice of leetcode.