I applied online. The process took 1 week. I interviewed at Optiver in Dec 2019
Interview
The interview was conducted over the phone (received a phone call one day, was not given any advance notice of the interview). I was asked about my personal background and employment history, my knowledge of the market-making industry, and several basic probability questions/brainteasers.
Interview questions [1]
Question 1
What does a market-maker do and why are you interested in working in this industry.
a very typical intern interview, just ask u some normal question about ur background and why trading why the company
only general behaviour question, nothing about math or tech for the first round interview
There were many different mini games that did not immediately appear relevant to trading. The games during the interview appeared to measure confidence, technical skill, and how risk averse the candidate was.
Interview questions [1]
Question 1
Rolling a fair die 1-6, probability of getting each number exactly once.
Mental math assessment, rapid fire market making virtual interview mostly on Fermi estimations, virtual aptitude assessment with HR followed by final day of interviews on betting strategies and making markets.
Interview questions [1]
Question 1
You and N other players are each dealt a number and bet on the average taking turns and going around many times. What is your strategy? How does it change if everyone knows the distributions the numbers were sampled from?