Jane Street interviews in three broad stages: an application reviewed by a person, phone or Zoom interviews, and a final round in person. The questions are problems you solve with the interviewer: probability, statistics, coding and data analysis for trading, and open-ended coding problems for software engineering.
The process details below come from Jane Street's interviewing page, its trading interviews page and its software engineering preparation page. Where Jane Street doesn't say something, we say so.
The Jane Street hiring process at a glance
| Stage | What happens | What Jane Street says about timing |
|---|---|---|
| 1. Application | Jane Street responds to every application, and considers it for all its open roles globally, not only the one you applied for. | A recruiter should contact you "in just a few days" |
| 2. Phone or Zoom interviews | Technical interviews with Jane Street staff. Software engineering candidates have their first technical interview over Zoom. | No weekend interviews; recruiters work Monday to Friday, local business hours |
| 3. Final round | In person at one of Jane Street's offices. Jane Street covers travel and hotel costs. | Not published |
| 4. Decision | You hear whether you're moving forward after your interviews. | Within a week of your interviews |
What is the Jane Street interview process?
You apply, a recruiter contacts you, and you move through phone or Zoom interviews to a final round in person. Jane Street says the process varies by discipline and centres on collaborative problem solving: you work through a problem with your interviewers, and they want to see how you think. It doesn't publish how many rounds each role has or how long the whole process takes; your recruiter explains the steps for your role.
A few practical points from Jane Street's interviewing page:
- Applications are reviewed on a rolling basis, with no typical deadline. Jane Street suggests applying when you're ready to interview within the next few weeks.
- No cover letter is needed, and no degree, GPA or finance background is required.
- If you have a competing offer or deadline, you can ask for an expedited process.
- You can reapply after a rejection. Jane Street generally asks students to wait at least a year, and experienced candidates to wait until their experience or circumstances have changed significantly.
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What happens in the Jane Street application review?
Jane Street responds to every application and considers it for all its open roles globally, so a recruiter may suggest a different role from the one you picked. You should hear from a recruiter within a few days of applying. If you're selected, the recruiter explains the next steps.
What happens in the Jane Street phone interview?
For trading, the process starts with phone interviews. Jane Street says to wait for its call, and to ask for a Zoom interview instead if you expect a poor connection. For software engineering, the first technical interview is over Zoom and involves writing real code.
Jane Street's 2020 software engineering interview post said its phone interviews used CoderPad, a shared browser-based code editor, and that the on-site had two to four technical rounds. That post is dated, and Jane Street said then that it is constantly iterating on its process, so check the current format with your recruiter.
Does Jane Street have an online assessment?
Jane Street's current interviewing pages don't describe one. Its 2020 post said candidates in London might first complete a HackerRank round before the phone interview. Candidates on review sites have also reported online assessments for some internship programmes, but Jane Street hasn't published what they contain, so treat those reports as unconfirmed.
If your recruiter sends you a HackerRank test, our guide to HackerRank tests explains how the platform works.
What happens in the Jane Street final round?
The final round is in person at one of Jane Street's offices, and what it covers depends on the role:
| Role | What Jane Street says the interviews cover |
|---|---|
| Quantitative trading | Problem solving, probability and statistics, coding in any language, data analysis and general interests. No finance or economics. |
| Quantitative research | A mix of the trading and software engineering processes. |
| Software engineering | Mostly or entirely collaborating on a series of coding problems. |
| Machine learning | Realistic modelling problems that reflect the daily work. |
| Strategy and product | How quickly you learn and how you approach problems, not prior knowledge or frameworks. |
| Trading desk operations engineering | Technical, organisational and communication skills. |
Trading interviewers are quantitative traders, and Jane Street says the interview "will feel a lot more like a conversation than a quiz". It says the interviews won't involve complicated maths of the kind taught in higher-level college courses.
In software engineering interviews, Jane Street prefers open-ended problems to puzzles and says the route you take through the problem matters more than the solution at the end. You write in a real programming language, not pseudocode. There's no bonus for using OCaml, so use it only if it's your strongest language.
What happens after the Jane Street interviews?
Jane Street says you should hear back within a week, whether or not you're moving forward. It doesn't publish how offers are made or how interviews are scored.
What does Jane Street look for?
For trading, Jane Street names curiosity, organisation, open-mindedness and comfort with numbers and logic. It adds, "maybe most importantly", humility, being pleasant to work with and openness to feedback. For software engineering, its advice is to be nice, be clear, know your language and know what you don't know. Across all roles, it wants to see what you're like to work with.
Common Jane Street interview questions and how to answer them
Jane Street doesn't publish a question list, and it says much of the information about its interviews online is outdated or wrong. The questions below are types to prepare for, built from the topics Jane Street lists and what it says it looks for.
1. Why Jane Street?
Be specific about the work: trading, the technology or the way the firm describes collaborative problem solving. Jane Street says it values curiosity, so show what you've read or asked about, and connect it to the role you applied for.
2. Talk me through how you'd approach this problem.
This is the core of every Jane Street interview. Jane Street's advice is to approach the problem methodically and communicate clearly. Say what you're trying first, why, and what you'd check next. Silence makes it hard for the interviewer to help you.
3. What's the expected value of this game, and would you play it?
Trading interviews cover probability and statistics. Set up the outcomes and their probabilities, compute the expected value, then answer the decision part: would you pay to play, and at what price?
4. You've made a mistake in your working. What now?
Jane Street lists "correct your mistakes" as a tip. Say so as soon as you notice, find where it went wrong, and fix it. Defending a wrong answer is worse than the mistake.
5. Write code to solve this problem.
Use the language you know best, write real code and talk as you go. Start with a simple working version, then improve it. Jane Street says it cares more about your process than the final snapshot of the code.
6. The requirements have changed. How would you extend your solution?
Jane Street says its software engineering interviews use open-ended problems. Show you can restructure code cleanly, name the trade-offs and ask clarifying questions before you change things.
7. Here's some data. What would you look at first?
Data analysis is on the trading interview list. Start with what the data is and how it was collected, look for obvious problems, then form a hypothesis and say how you'd test it.
8. Why do you think that's true?
Jane Street's tips include "ask why". Expect the interviewer to probe your reasoning, and practise explaining the assumption behind each step. When you're unsure, say what you know and what you don't, which matches its advice to know what you don't know.
9. What do you do outside your studies or work?
General interests are on the trading final round list. Pick something you can talk about in depth and explain what you've learned from it. Curiosity is the trait on show.
10. Tell me about a time you received critical feedback.
Jane Street names openness to feedback and humility as some of the most important things it looks for. Describe the feedback, your first reaction, and what you changed. Use the STAR method to keep it short.
11. How would you learn a topic you know nothing about?
Strategy and product interviews focus on how quickly you learn. Describe your approach: where you'd start, how you'd check your understanding and how you'd know you were ready to act.
12. Do you have any questions for us?
Ask about the team's work, how traders and engineers collaborate, or what a new joiner learns in their first months.
How to prepare for the Jane Street interview
- Read Jane Street's own guides for your role: the trading interviews page and its Probability & Markets guide for trading and research, the software engineering preparation page for engineering, and the Strategy and Product interview guide for that track.
- Watch Jane Street's mock interview videos. Its trading and software engineering pages each link one.
- Practise thinking out loud on probability, statistics and coding problems, with someone who'll interrupt and ask why.
- For software engineering, code in your strongest language in a plain editor, with real syntax.
- Practise correcting mistakes in the moment. Do problems under mild time pressure and narrate what you're checking.
- Do a mock interview before the real one, so a collaborative interview doesn't feel unfamiliar.
- Tell your recruiter about deadlines from other offers early, as Jane Street invites.
Practising realistic work tasks
Jane Street's interviews test how you work through real problems, and that improves with practice on realistic tasks. Cohesyve, which publishes this guide, runs practice job simulations for your role, with a scored report on where you lost marks. It isn't affiliated with Jane Street and doesn't use Jane Street's interview questions or assessments.
FAQs
How long does the Jane Street interview process take?
Jane Street doesn't publish a total. It says a recruiter should contact you within a few days of applying, and that you'll hear within a week whether you're moving on. You can ask for an expedited process if you have a deadline.
Do I need to know finance for a Jane Street interview?
No. Jane Street says it won't test you on finance or economics, and no finance background is required.
Do I need to know OCaml?
No. Jane Street says there's no advantage to using OCaml in interviews, and advises against trying it for the first time there. Use the language you know best.
Are there brainteasers in Jane Street software engineering interviews?
Jane Street says its software engineering interviews don't include mental maths, maths olympiad questions or logic puzzles. They focus on open-ended coding problems.
Is the Jane Street final round in person?
Yes. Jane Street holds final rounds in person at its offices and covers travel and hotel costs.
Can I reapply to Jane Street after a rejection?
Yes. Jane Street generally asks students to wait at least a year, and experienced candidates to wait until their experience or circumstances have changed significantly.
Sources
Jane Street's own pages, checked 27 October 2026:
- janestreet.com: What to expect when interviewing
- janestreet.com: Trading interviews
- janestreet.com: Preparing for a software engineering interview
- blog.janestreet.com: The Jane Street interview process, 2020 edition (24 July 2020)