Jane Street Quantitative Analyst candidates report probability and expected-value games, spoken reasoning, and in some cases market-making, trading and light coding questions. Here is what to expect and how to prepare.
$278K
Avg. Base Comp
$350K
Avg. Total Comp
Not reported
Typical Rounds
1 month
Process Length
Candidates describe the Jane Street Quantitative Analyst interview as a test of probability and expected-value reasoning spoken aloud, not a standard coding screen. Several report an online assessment first, with one describing an Excel take-home that rewarded attention to detail. Phone or Zoom rounds follow, then a longer final or superday stage for those who advance. Round counts differ across reports, and one candidate put the whole process at about a month.
The early questions are usually dice, coin and betting games that start simple and get harder through follow-ups. Reported examples include a Rock-Paper-Scissors variant where the opponent cannot play rock, the expected value of a 100-sided die game, a three-player dice game where ties restart the round, and how many coin flips it takes to get two heads in a row. One candidate said they had to describe a strategy before doing any calculation. Another said the interviewer kept pushing with follow-up questions after each answer.
Some reports move toward trading. Candidates mention making a market on dice values as they were revealed, order-book basics, and a trading-platform design discussion. One report describes the coding as simple and not LeetCode-style, and another candidate had a round that was more coding-focused.
The reported outcomes are overwhelmingly rejections, so treat this as a selective process. Practice stating assumptions, giving a rough strategy before calculating, explaining your reasoning out loud while being probed, and recovering calmly when you are stuck. Be ready to defend the details on your resume, too.
Synthesized from 77 candidate reports by our editorial team.
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Real interview reports from people who went through the Jane Street process.
The question I still think about is the one about designing the interface between a trading system and an exchange, with a specific selling restriction I had to account for. I had prepared for probability, and I was not ready for a prompt that lived more in architecture than in math. The interviewer kept pushing on my assumptions instead of letting me finish a clean design.
The process started with an online assessment. It had a probability section and a question on order book execution, where I had to reason about how orders fill against resting liquidity rather than just compute an expected value. The first Zoom round was a restaurant reservation system design, which felt manageable until the interviewer added a brainteaser about typing Xs that I had to work through out loud. The second Zoom round was the trading interface question. Looking back, the restriction was the part that tested whether I understood how real execution constraints shape a design.
I was turned down after the second Zoom round, and the feedback I got was thin, so I still don't know exactly where my reasoning fell short.
Prep tip from this candidate
Practice system design prompts that include a real trading constraint, such as a selling restriction, and talk through how the constraint changes the interface, since interviewers pressed on that harder than on the math. Also drill probability questions that stack conditions one after another, because the problems kept adding rules mid-question.
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Sourced from candidate reports and verified by our team.
Topics based on recent interview experiences.
Featured question at Jane Street
What is the probability that each subsequent card is larger than the previous drawn card when picking three cards from a shuffled deck of 500 cards
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| Last Element of a Singly Linked List | |
| Above Average Product Prices | |
| International e-Commerce Warehouse | |
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| LRU Cache 1 | |
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| Incentive Scheme | |
| WallStreetBets Sentiment Analysis | |
| Decreasing Ride Costs | |
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Synthesized from candidate reports. Individual experiences may vary.
Several candidates report an online assessment early on. One described short probability brain teasers and order-book basics, and another described an Excel take-home that rewarded attention to detail. Not every candidate describes this step, and one mentions a short write-up and candidate survey beforehand.
Candidates report one or more phone or Zoom interviews built around dice, coins, games and expected value. One candidate described a 45-minute to 1-hour call. Interviewers may keep pushing with follow-up questions after you answer, so thinking aloud matters.
Some candidates describe later rounds getting harder, with open-ended games where you find an optimal strategy and problems unlike typical quant questions. Round counts differ across reports. Coding appears in some reports, and one candidate described it as simple rather than LeetCode-style.
One candidate was asked to make a market on dice values as they were revealed one by one, adjusting bid and ask prices as new information came in. The same candidate reported order-book basics and a trading-platform design discussion. Practicing quoting and updating a price is likely useful.
Candidates who reached the final stage report an in-person day with several interviews, and one reported a seven-round superday. Content mixed probability, brainteasers, game theory, questions close to the job, resume walk-throughs and some simple coding. One candidate described the whole process as taking about a month.
