ProbabilityHardResearch round
Interview library · Amsterdam, Netherlands
Jane Street quant interview questions in Amsterdam
23 questions · 4 reported stages · rank 6 market · pay in EUR
What is the Jane Street quant interview like in Amsterdam?
Jane Street runs the same 4 stage quant loop in Amsterdam as elsewhere: screening call, probability and mental maths, technical rounds, final / on-site. Local demand is concentrated in hft, market making, trading technology. Pay is benchmarked in EUR at about 74% of the New York figure for the same role and seniority, and the final round is usually held in the Amsterdam office.
The loop as candidates report it (compiled, not official)
Each round answers the question candidates in Amsterdam ask, then points at the round that follows it.
- Stage 1Screening call
What happens in the screening call at Jane Street?
Recruiter conversation and background discussion. It is stage 1 of 4 in the Jane Street loop, and candidates who clear it move to the probability and mental maths.
Next step: Probability and mental maths - Stage 2Probability and mental maths
What happens in the probability and mental maths at Jane Street?
Fast-paced expected-value and market-making games. It is stage 2 of 4 in the Jane Street loop, and candidates who clear it move to the technical rounds.
Next step: Technical rounds - Stage 3Technical rounds
What happens in the technical rounds at Jane Street?
Algorithms, problem solving, and for engineers a strong functional-programming component. It is stage 3 of 4 in the Jane Street loop, and candidates who clear it move to the final / on-site.
Next step: Final / on-site - Stage 4Final / on-site
What happens in the final / on-site at Jane Street?
Multiple interviewers, trading games, and estimation under time pressure. It is stage 4 of 4 in the Jane Street loop and it is the final decision point.
Next step: rehearse the practice set
What a passed loop pays in Amsterdam
Benchmarks in EUR for the roles Jane Street hires here, across every seniority we publish.
Practice questions for the Amsterdam loop
Matched to the topics Jane Street draws on for the roles it hires here: probability, mental maths, market making, statistics, brainteaser, machine learning, algorithms, c++ and systems. Written originally for this platform.
Market makingHardTrading round
You are quoting a market and get lifted five times in a row on the offer, in full size, by the same counterparty. Nothing else in the market has moved. What do you do?
StatisticsHardResearch round
Your alpha shows a strong in-sample relationship with next-day returns, but the effect halves out of sample. Give three explanations that are not overfitting.
AlgorithmsHardEngineering round
You receive a stream of order-book updates and must report the maximum trade price in the last N events at every step. How?
C++ and systemsHardEngineering round
Your median tick-to-trade latency is fine but the 99.9th percentile is ten times worse. Name the likely causes.
Machine learningHardResearch round
A gradient-boosted model predicts next-hour returns with an out-of-sample R² of 0.004. Is that useful?
BrainteaserHardFirst round
One hundred prisoners each open 50 of 100 boxes searching for their own number; all must succeed or all fail. What strategy beats a vanishingly small success rate?
ProbabilityStandardFirst round
Two people independently pick a real number uniformly from [0, 1]. What is the probability the two numbers differ by more than 0.25?
ProbabilityStandardFirst round
A random walk starts at 0 and moves +1 or −1 with equal probability each step. What is the probability it reaches +3 before it reaches −5?
Mental mathsStandardFirst round
Estimate the square root of 4,600 to one decimal place in under ten seconds.
Mental mathsStandardTrading round
A contract pays 100 if an event happens and 0 otherwise. It trades at 37. You think the true probability is 41%. You can trade 500 contracts. What is your expected edge?
Market makingStandardTrading round
I roll two fair six-sided dice and pay you the product. Make me a market, two wide.
Market makingStandardTrading round
Make a market on the number of petrol stations in the United Kingdom.
StatisticsStandardResearch round
You backtest 200 signals and the best one has a Sharpe ratio of 2.4. Should you trade it?
StatisticsStandardFirst round
Two return series each have a correlation of 0.6 with a third. What is the tightest bound you can put on their correlation with each other?
AlgorithmsStandardEngineering round
Design a data structure that supports insert, delete and get-random-element, all in expected O(1).
AlgorithmsStandardEngineering round
How would you implement a limit order book supporting add, cancel and match, and what is the complexity of each?
C++ and systemsStandardEngineering round
Why might std::unordered_map be a poor choice on a latency-critical hot path?
C++ and systemsStandardEngineering round
Explain false sharing and how you would detect it in a multi-threaded market data handler.
Machine learningStandardResearch round
Why is k-fold cross-validation usually wrong for financial time series, and what do you use instead?
BrainteaserStandardFirst round
You have 25 horses and a track that races five at a time, with no timer. What is the minimum number of races to find the fastest three?
ProbabilityWarm-upPhone screen
You flip a fair coin three times. Given that at least one flip came up heads, what is the probability all three were heads?
Mental mathsWarm-upPhone screen
What is 17 × 23, without writing anything down?
Questions candidates in Amsterdam ask
How many interview stages does Jane Street in Amsterdam run?
4 published stages: screening call, probability and mental maths, technical rounds, final / on-site. The sequence is the same for the Amsterdam desk as elsewhere, with the final round usually held locally.
What topics does the Jane Street quant interview test?
Mainly probability, mental maths, market making, statistics. Jane Street hires for 3 quant families, so the technical rounds are weighted to the role rather than to finance knowledge.
How hard is the Jane Street quant interview?
Hard by market standards. Our practice set for this loop runs to 23 questions, sorted with the hardest first, and the backgrounds that clear the bar are typically olympiad mathematics and competitive programming.
What does a quant role at Jane Street pay in Amsterdam?
Quant Researcher total compensation in Amsterdam benchmarks at €157k – €1.7m, with a median of €323k in EUR. Jane Street sits around 125% of the market benchmark for the same role and seniority.
Does Jane Street hire quants in Amsterdam?
Yes. Amsterdam is one of 6 markets where Jane Street runs a desk, and it ranks 6 globally in our hiring index with demand concentrated in hft, market making, trading technology.
Are these real Jane Street interview questions?
No. Stage detail is compiled from public sources and candidate reports and labelled as such. Every question is written originally for this platform to rehearse the same reasoning, so nothing here republishes a firm's own question bank.
Who else hires quants in Amsterdam
Prepare once, interview across the local market.
Stage detail is compiled from public sources and candidate reports and is labelled as such. Questions are written originally for this platform. Pay figures are benchmarks by role, seniority and market, not an offer from Jane Street.
Introductions
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Methodology
Figures are expressed as annual total compensation (base salary plus expected performance bonus) in the reference market's local currency, converted from a US dollar base. They describe typical market ranges rather than any individual offer, and exclude sign-on payments, deferred equity and carried interest. Portfolio-manager figures reflect formulaic profit-share arrangements and are therefore far more dispersed than any other role.
KnowQuantIndex 2026.1 · Updated September 2026
Modelled bands describe the market, not an individual offer. Where an employer states pay, the stated figure is used and labelled as such.
Amsterdam intelligence
Interview in Amsterdam knowing what the market pays
The loop, the reasoning it tests, and the local benchmark once you clear it.