What interview questions does Jane Street ask?

Candidates have reported 14 questions from Jane Street interviews to TrueInterview: 5 system design, 5 algorithm and 4 study. Each one is filed under the round it came up in, with the month it was reported where a candidate gave one, and opens in the workspace that format calls for — an editor judged against hidden tests for coding and SQL, a whiteboard for system design.

How recent are these Jane Street interview questions?

The most recent Jane Street question on this page was reported in October 2026. A question shows the month a candidate reported it whenever that is known, so an entry that has gone stale is visible as one rather than presented as current.

Which Jane Street interview rounds do these questions come from?

The reported Jane Street questions on this page are filed under 3 rounds: Online Assessment, Phone Screen and Onsite. Filtering by a round gives you the questions candidates were asked at that stage rather than the whole bank at once.

How hard are Jane Street's interview questions?

Of the 10 rated Jane Street questions on this page, the spread is 2 medium and 8 hard. Difficulty is the rating on the question itself, not a prediction of how a particular loop will go.

Where do these Jane Street interview questions come from?

From candidates who sat the interview. Some send us their questions by email or upload; the rest we summarize from interview experiences, on the public board or published elsewhere, then verify and file by company, format and round. Nothing covered by an NDA is accepted, and the sourcing rules are published in full at /methodology.

Do I need an account to practise Jane Street questions?

Browsing this page needs no account, and 6 of the 14 Jane Street questions listed here open in full for free. The rest are part of a paid plan, and every row says which it is before you click it.

Jane Street Interview Questions: 14 Real Questions

Company research

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Jane Street is a quantitative trading firm founded in 2000 by a small group of traders and technologists in New York. It trades a broad range of asset classes on more than 200 venues in 45 countries and builds almost all of its software in-house. It also works with institutional clients, providing liquidity and trading solutions.

financial services
New York City
Founded 2000
Bootstrapped

Covered in the research, each with its source

Technology and AI
Engineering culture
Likely challenges
Competitors and position

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Jane Street hiring insights

Computed from candidates’ write-ups and our Jane Street questions.

What they ask

Topic mix

Hashing50%(2)
Dynamic Programming25%(1)
Sorting25%(1)

Across the 4 of 14 Jane Street questions tagged with a topic.

Difficulty mix

Medium20%(2)
Hard80%(8)

Across the 10 of 14 questions with a difficulty rating.

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Interview questions14

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System Design5 Algorithm5 Study4 OA1 Phone Screen10 Onsite3 Medium2 Hard8

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Frequently asked: Jane Street interviews

What interview questions does Jane Street ask?: Candidates have reported 14 questions from Jane Street interviews to TrueInterview: 5 system design, 5 algorithm and 4 study. Each one is filed under the round it came up in, with the month it was reported where a candidate gave one, and opens in the workspace that format calls for — an editor judged against hidden tests for coding and SQL, a whiteboard for system design.
How recent are these Jane Street interview questions?: The most recent Jane Street question on this page was reported in October 2026. A question shows the month a candidate reported it whenever that is known, so an entry that has gone stale is visible as one rather than presented as current.
Which Jane Street interview rounds do these questions come from?: The reported Jane Street questions on this page are filed under 3 rounds: Online Assessment, Phone Screen and Onsite. Filtering by a round gives you the questions candidates were asked at that stage rather than the whole bank at once.
How hard are Jane Street's interview questions?: Of the 10 rated Jane Street questions on this page, the spread is 2 medium and 8 hard. Difficulty is the rating on the question itself, not a prediction of how a particular loop will go.
Where do these Jane Street interview questions come from?: From candidates who sat the interview. Some send us their questions by email or upload; the rest we summarize from interview experiences, on the public board or published elsewhere, then verify and file by company, format and round. Nothing covered by an NDA is accepted, and the sourcing rules are published in full at /methodology.
Do I need an account to practise Jane Street questions?: Browsing this page needs no account, and 6 of the 14 Jane Street questions listed here open in full for free. The rest are part of a paid plan, and every row says which it is before you click it.

How these questions are sourced and verified