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Designing an in-memory order book in a quant interview

techinterview.org / June 30, 2026

5 min read The order-book question is simple to state and brutal in the follow-ups. Here’s what trading firms actually look for. Read article

System Design

Design a Stock Trading Platform

techinterview.org / April 16, 2026

5 min read Design a stock trading platform like NYSE, Nasdaq, or a brokerage like Robinhood. This problem is notable for its extreme Read article

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