Crushing the Technical Interview

System Design

System design interviews separate good engineers from great ones, and most candidates walk in underprepared. This book is a comprehensive guide for software engineers at every level who want to approach system design interviews with confidence, clarity, and the kind of structured thinking that impresses even the toughest interviewers.

Drawing on real-world problems like designing Facebook's News Feed, distributed messaging systems, and scalable data pipelines, this book teaches you not just what to design, but how to think.

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What You'll Learn

Inside, you'll learn how to break down ambiguous problems into clear requirements, define data models and APIs that hold up under scrutiny, and navigate the deep technical trade-offs that senior and staff-level interviews demand.

A proven framework: business requirements, scalable solutions, diagrams, follow-ups
Level-specific guidance for mid-level, senior, and staff+ interviews
Real-world case studies (News Feed, messaging systems, data pipelines)
Data modeling and API design under interview pressure
Deep technical trade-off discussions
How to structure ambiguity into a clear, defensible design

Who It's For

Whether you're a new grad preparing for your first big tech loop or a seasoned engineer leveling up to principal, this book gives you the tools to walk into any system design room and own it.

From the Same Author

If you're preparing for the coding round too, check out the companion guide.

Data Structures and Algorithms

Get the Code

All the code examples from the book are available on the author's GitHub page.

View on GitHub