Jane Street Coding Interview Questions (2026)
Most-reported questions and how to practice them
15 coding questions reported by candidates for Jane Street, sorted by how often they were reported. Source: community-sourced LeetCode company lists.
What the Jane Street question data shows
Of the 15 questions reported for Jane Street, 33% are medium, 20% are hard and 47% are easy. The most reported are Minimum Time to Make Array Sum At Most x, Walking Robot Simulation, Count Common Words With One Occurrence, Design a Text Editor, LRU Cache.
This list comes from community-sourced LeetCode company lists. It covers coding questions only. It does not tell us how many rounds Jane Street runs, what each round covers, or what it pays, and those change by role, level and team, so we do not list them. Ask your recruiter what each round covers, and check the company's careers page.
Prepare for the rest of the loop with the coding interview patterns guide, the system design framework, and the STAR method guide. Written by Kieron.
Practice what you read with a free AI mock interview, see how the tools compare in our AI interview copilot comparison, or check Aissence pricing.
Jane Street Interview Questions
15 LeetCode questions — sorted by frequency. Question frequency is community-sourced from public interview reports and may not reflect the current process; verify details with the employer.
Last reviewed: September 5, 2026 · Source: LeetCode company-wise interview questions (community reports) · Reviewed by the Aissence Editorial Team.
Minimum Time to Make Array Sum At Most x
Walking Robot Simulation
Count Common Words With One Occurrence
Design a Text Editor
LRU Cache
Longest Common Prefix
Stream of Characters
Add Two Integers
Add Strings
Teemo Attacking
Valid Parentheses
Two Sum
Number of Orders in the Backlog
Add Two Numbers
Evaluate Division
Tips for Success at Jane Street
Start with the 15 most reported Jane Street questions, then work down the list.
Mediums are the bulk of the list (33%), so spend most of your time there.
Time yourself: 20 to 30 minutes per medium, then explain your solution out loud as if to an interviewer.
After each problem write down the pattern and the signal that revealed it. Patterns transfer to problems you have not seen.
Pair coding practice with a system design framework and prepared behavioral stories; most loops include more than coding.
How to Practice for Jane Street Interviews
Practice answering out loud with an AI interviewer built from your resume and the job description, and get a score and specific fixes for each answer. We are not affiliated with Jane Street, and the mock interview is general practice rather than a simulation of Jane Street's own format.
- ✓ Free mock interview built from your resume and the job description
- ✓ Desktop Interview Copilot for live interviews, where the rules allow it
- ✓ Behavioral practice with feedback on structure and specifics
- ✓ System design practice with follow-up questions
Frequently Asked Questions
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