I applied online. The process took 1 day. I interviewed at Optiver (Amsterdam) in Jan 2019
Interview
You had to do three math tests; first test is straightforward mental math (80 questions 8 minutes), second test consist of numerical sequences (26 questions 30 minutes), third test is combination of this (40 questions 10 minutes)
The following proces:
1st round were games, including mental math, memory games
2nd round was hr interview, asking questions about motivation
3rd round: technical interview
4th round: technical interview
5th round: at office
I only got past the online assessment and got to the first round which was a HR interview. The online assessment involves 2 tests, probability questions and one with some form of games which test your reaction time, your thinking etc. it was quite fun to do
Interview questions [1]
Question 1
One thing they asked was my experience/what I did for trading. Unfortunately, I had no experience within trading.
80x8 Test : mental math exercise where I had to solve 80 short arithmetic problems in 8 minutes without using a calculator or paper. The questions are usually simple in structure—typically involving addition, subtraction, multiplication, or division of small numbers
Interview questions [1]
Question 1
80 short arithmetic problems involving addition, subtraction, multiplication, or division of small numbers but also fraction and small equations
