Interview Cache
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Jane Street
19 problems across 4 categories
| Done | Title | Difficulty | Updated |
|---|---|---|---|
| Optimize trade PnL table updates Software EngineerCoding | Hard | Feb 18, 2026 | |
| Transform sparse time-code stream to dense rows Software EngineerCoding | Easy | Feb 12, 2026 | |
| Validate order book data across multiple databases Software EngineerSystem Design | Easy | Dec 15, 2025 | |
| Sort trade executions into a canonical order Software EngineerCoding | Easy | Dec 15, 2025 | |
| Design exchange–trading system message flow Software EngineerSystem Design | Easy | Dec 15, 2025 | |
| Solve probability and game-theory puzzles Data Scientist | Easy | Dec 1, 2025 | |
| Solve queue switch and coin change puzzles Data ScientistCoding | Medium | Oct 14, 2025 | |
| Analyze trading RFQ competitiveness data Data Scientist | Medium | Oct 14, 2025 | |
| Use Excel formulas to compute haircuts Software Engineer | Medium | Sep 6, 2025 | |
| Implement Connect Four with bottom push-up Software EngineerCoding | Medium | Sep 6, 2025 | |
| Design sequential reveal classification and policy Software EngineerSystem Design | Hard | Sep 6, 2025 | |
| Calculate win chance in three-player dice game Software Engineer | Medium | Sep 6, 2025 | |
| Answer why Jane Street Software EngineerBehavioral | Easy | Sep 6, 2025 | |
| Predict future time-series values Machine Learning EngineerSystem Design | Hard | Aug 4, 2025 | |
| Implement compiler for custom language Machine Learning EngineerSystem Design | Hard | Aug 4, 2025 | |
| Calculate dice game win probability Software Engineer | Easy | Aug 4, 2025 | |
| Design and implement a tiny language runtime Machine Learning EngineerSystem Design | Hard | Aug 1, 2025 | |
| Design an end-to-end training framework Machine Learning EngineerSystem Design | Hard | Aug 1, 2025 | |
| Build a time-series forecasting model Machine Learning Engineer | Hard | Aug 1, 2025 |