Sources checked 2026-08-10

Jane Street

Interviews run as conversations, not quizzes: probability, expected value, making markets and estimation, all reasoned out loud. No finance knowledge, and you code in any language you like.

The Jane Street process

3 of 4 stages you can practise here

01
Recruiter Screen30 minchill
Light, warm, conversational
curious, organized, and open-mindedmotivation fitproblem-solving mindset
02
Phone interviews (remote)
One or more remote interviews to start. For trading these are conversational probability/logic and market conversations with an actual quant trader; for SWE they are live coding. The interviewer calls you (Zoom if connectivity is poor).
2 rounds you can practise
Probability & Expected Value (spoken)45 minrealistic
Run by an actual quant trader
approach the problem methodicallycommunicate clearlycorrect your mistakes
Coding Phone Screen45 minrealistic
Collaborative, discussion-heavy live coding in your own language and setup
correctnessdata structures & complexitycommunication
03
In-person final round (onsite)
The final stage is in person: multiple back-to-back interviews mixing probability, a market-making game, estimation, a light coding/data-analysis chat, and fit. Jane Street books and pays for travel and hotel; interviews run weekdays only, dress casual.
4 rounds you can practise
Fit / Why Jane Street30 minchill
Low-key and genuine, not a McKinsey-style structured behavioral
curious, organized, and open-mindedhumble and open to feedbackcommunicate clearly
Market-Making Game (spoken)45 minbrutal
The signature Jane Street round
expected-value reasoningspread-settingadverse selection
Estimation & Problem Solving (spoken)30 minrealistic
Fermi/estimation and open reasoning, plus a light data-analysis and general-interests chat
structured thinkingnumeracy as a sanity checkcalibration
Onsite Coding60 minbrutal
Harder onsite live coding, same collaboration-over-a-right-answer ethos
correctnessalgorithmic reasoningdebugging under light pressure
04
Decision
Jane Street says you should hear back within about a week after the final stage. Reapplication is explicitly allowed (recommended wait ~1 year).

Sources

Built from what Jane Street publishes about its own process and from real interview data. No leaked question lists. The questions you get are generated against your own resume, so they are not from anyone else's interview.

companyJane Street, How We Interviewjanestreet.com
Two-stage process, conversation-not-a-quiz philosophy, any-language coding and OCaml guidance, logistics and reapplication
companyJane Street, Trading Interviewsjanestreet.com
Trading two-stage structure, final-round content, desired traits, four principles, myth-busting on mental math and theorems
companyJane Street, Probability & Markets guide (PDF)janestreet.com
Trading interview syllabus, verbatim example probability/EV questions, market-making game prompts and quoting jargon, adverse selection
companyJane Street, Join overviewjanestreet.com
Company blurb, roles, 'smart people with curious minds from any background'
companyJane Street, SWE mock interview videojanestreet.com
Official software-engineering mock interview walkthrough referenced by the interviewing page
datalevels.fyi, Jane Street salaries & levelslevels.fyi
Confirms Jane Street SWE levels (L1-L4) and titles including Quantitative Developer and Full-Stack Software Engineer

Sources last checked August 10, 2026. Hiring loops change, so this date is the honest limit on everything above.

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