I applied online. The process took 2 days. I interviewed at Optiver (Sofia, Sofia (city)) in Apr 2020
Interview
I got contacted to do a programming test on HackerRank in order to check my skills. It was nothing too harsh, basic knowledge questions, which required some knowledge in C++ and Java as well as two coding ones.
Interview questions [1]
Question 1
There were 8 standard HackerRank questions, which had to be solved in 2 days.
The interviews consisted of an OA, then behavioural, then technical and thena final round consisting of another technical, system design and behavioural. These last interviews all an hour each. I only got up to the first technical.
OA; quite long, 3 tests
Behavioral interview: just a short talk with HR, motivation,…
Technical Interview 1: fundamental CS, nothing more
Technical Interview 2: system design, very vague but just go with the flow
Technical Interview 3: live coding, still leetcode but optiver style is a very descriptive problem, but the main thing could be boiled down into only few lines
