I applied online. The process took 2 weeks. I interviewed at Optiver (Amsterdam) in Apr 2024
Interview
Initial Assesments:
Coding Test 2 questions, medium leetcode questions with some originality around it.
ZAP-N: Short games structered to test your cognitive capability. Basically you press one 2 buttons in your keyboard depending on the input. You need to be both fast and accurate.
Number Logic: Numerical reasoning test, nothing special.
Beat the Odds: Probability test where you need to be extremely fast and accurate. You do not have time to think and deduct the formula you simply need to know. You should definitely practice
Interview questions [1]
Question 1
What is the expected number of card draws before encountering a Ace?
Passed Multiple Rounds.
First was a long OA with coding and maths questions.
Then HR
Then technical interview with a quant researcher.
Then a data challenge then i had to present the results of my data challenge.
Failed at this round
Interview questions [1]
Question 1
Markov and coin tosses questions.
Probability that a table with 3 legs places randomly on a circle doesn't fall.
Questions about what would happens if features were correleated, why this model not another one, why this hyperparameter. difference ridge vs lasso. difference supervised vs unsupervised
2:30 hr OA contains coding probability game and quick math. Then a market making game round. Need to be quick. Then will be another market making game round. Both asking questions to make market.
I applied through an employee referral. The process took 4 weeks. I interviewed at Optiver (Amsterdam) in Nov 2025
Interview
OA, HR interveiw, Technical Interview, Take home assignment, Final round interviws (one HR one tech discussing take home). OA can be practised on various websites online. HR screen focussed on team work a lot. Technical was not too difficult, I may have just lucked out with the questions. Final round discussed ML techniques and their assumptions
