I applied online. The process took 2 months. I interviewed at Optiver (Sydney)
Interview
1) 5 part Online Assessment:
- 80 in 8 (80 easy arithmetic questions to be done in 8 mins)
- Sequences test (26 sequences for which you need to recognise the pattern and select the next element, in 20 mins)
- Probability test (10 probability questions of varying difficulties, each of which you get 1.5 mins to solve - see tradermath brainteasers)
- Games to test various neurological capabilities (reaction time, multitasking, pattern recognition etc)
- Personality test
2) Behavioural Interview
3) Take home technical assignment (mine was machine learning based)
4) Technical interview: brain teasers and basic probability questions
5) Final interview (combined technical/behavioural), harder more in depth problems
Interview questions [1]
Question 1
What is the 100th derivative of f(x) = x*exp(x^2) at x = 0?
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
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
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.
