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.
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.