System Design Interview Crash Course
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Design Stock Exchange

Here is the step-by-step system design for a Stock Exchange.

1. Problem Definition and Scope

We are designing a centralized Stock Exchange where retail and institutional traders can buy and sell shares of public companies.

The core goal is to match buy and sell orders with strict fairness (First-In-First-Out) and extremely low latency.

  • Main User Groups:

    • Traders: Retail users (apps) and Institutional algorithms (bots) placing orders.

    • Market Data Consumers: Users or systems watching real-time price feeds.

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