Jane Street System Design Interview Questions
Practice the exact questions companies are asking right now.
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4 Questions 1 Company
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Jane Street
Easy
Software EngineerDesign exchange–trading system message flow
Design the message contract and flow between a firm's trading system (OMS/EMS) and an external exchange. Assume: - The trading system sends orders and...
System Design
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0
Dec 15, 2025
Jane Street
Easy
Software EngineerValidate order book data across multiple databases
Assume your organization stores order book–related data in multiple databases (e.g., one for raw exchange messages, one for normalized orders, one for...
System Design
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0
Dec 15, 2025
Jane Street
Hard
Machine Learning EngineerImplement compiler for custom language
Design and implement a simple compiler/interpreter Goal Design and implement a small compiler/interpreter for a bespoke toy language in your preferred...
System Design
0
0
Aug 4, 2025
Jane Street
Hard
Machine Learning EngineerDesign and implement a tiny language runtime
Minimal Imperative Language — Design and Implementation Task Context You are asked to design and implement a minimal imperative language and its tooli...
System Design
0
0
Aug 1, 2025