Optiver Software Developer Internship interview questions

First you have a Hackerrank, but it's not really the leetcodey type, you have 2 days to submit it. Then HR interview, which is a big filter so you need to prepare for it. Then there was a technical interview going over the Hackerrank and talking a bit about system design and fundamentals. Finally there was the superday with 1h on cs/math fundamentals (again, not leetcode stuff, more about problem solving), 1h on system design (ask LOTS of questions) and then 1h of non-technical / project presentation. Also got to meet the CTO and to speak with one of the former interns. Expect the interviews to be pretty tough, not really for what concerns prior knowledge, but more about being able to think on your feet. They appreciated interest in the company and in the industry. The process is very long but I received quick and detailed feedback.