Jane Street quant interview guide
Roles: Quantitative Trader, Quantitative Researcher, Software Engineer
Candidates commonly describe a process centred on probability puzzles, expected value, betting and market-making games, with a strong emphasis on clear reasoning out loud.
Commonly reported stages
1. Phone or video screen
Typically mental math and probability questions solved live with an interviewer.
2. Technical rounds
Longer probability and expected-value problems, often with follow-ups that change the assumptions.
3. Games and betting
Many candidates report market-making or betting games that test sizing, edge and updating on information.
What to practise
Tips
- Talk through your reasoning before computing.
- Sanity-check answers with bounds and symmetry.
- Be ready for 'what if' follow-ups after every answer.
This guide summarises publicly discussed formats, which change over time. QuantSolve is not affiliated with Jane Street, and QuantSolve problems are original, not questions from any firm.