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Prep plan
Updated weekly · Last refresh Aug 30

Jane Street Software Engineer Interview Questions

The questions to prepare for a Jane Street Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
CodingStart here. 23 questions · ~187 min
Win Probability With Reroll TiesHard
Recently asked

Tests probability modeling for conditional events and reroll logic with a forced outcome.

MathprobabilityJane Street
Ratios, Speed-Time, and Expected ValueMedium
Recently asked

Tests fast quantitative reasoning across multiple math topics including expected value.

MathprobabilityExpected ValueJane Street
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2
System Design11 questions · ~89 min
Immutable Tree Hashing and CompareHard

Evaluates your data structure design and performance considerations for hashing and remote comparison.

apiJane Street
Implement a Market SituationMedium

Evaluates your ability to translate a market scenario into correct software design and implementation.

designJane Street
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3
Pipelines3 questions · ~24 min
Top Trades From Event SequenceMedium

Assesses algorithmic thinking for extracting top-k results from streaming or sequential trade data.

top kJane Street
Push Results to a CacheMedium

Assesses your understanding of caching, consistency considerations, and pipeline integration.

cachingJane Street
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4
SQL & Data Manipulation5 questions + 3 drills · ~71 min
5
Behavioral & Leadership6 questions · ~49 min
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6
More topics2 questions · ~16 min
Network Fundamentals and RoutingMedium

Evaluates your understanding of core networking concepts relevant to infrastructure work.

NetworkingJane Street
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The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.