Optiver

First, you have a HackerRank, but it's not really the LeetCode type. You have two days to submit it. Then, an HR interview, which is a big filter, so you need to prepare for it. Next, there was a technical interview going over the HackerRank and ta

I did the OA. It involves a number of games, two coding questions, and coding knowledge tests. They are all pretty challenging. I remember the games were testing speed of numerical calculations and also some puzzle-solving abilities.

After I applied, I received an online assessment shortly. It was HackerRank-styled. I had only two choices of language: C++ and Java. A bit difficult than average, but doable with a lot of practice.