System Design, Pictured

AI can write the code. It can't understand the system for you.

This book makes sure you can.

Walk into the system design round and know why every box is there, what each arrow costs, and how to answer the counter-question that makes most candidates freeze.

How it sticks:
Every concept starts as a scene you already know. A fridge and a supermarket become a cache and a database. Airport counters become a load balancer. A bank token becomes a message queue. Then the real system, with exact definitions and numbers. Then the interview answer.

What you get:
• 30 concept chapters: estimation, DNS, load balancers, SQL vs NoSQL, indexes, caching, replication, sharding, CAP, transactions, queues, pub/sub, idempotency, rate limiting, CDNs, microservices, consistent hashing, failures and observability
• 15 case studies run as real 45-minute interview rounds: URL shortener, rate limiter, notifications/OTP, autocomplete, leaderboard, web crawler, news feed, WhatsApp, Google Drive, YouTube, live cricket streaming, Flipkart checkout, IRCTC Tatkal, Uber surge pricing, UPI payments
• 427 one-line memory codes, plus a cheat sheet to revise them all the night before
• About 10 real interview questions per concept chapter, with what they're testing, the counter-questions you'll get and the traps to avoid
• A score-yourself rubric for every case study, with the fresher vs SDE-2 bar
• Tested Python in every chapter, 5 practice levels, full solutions
• Every real-world fact sourced and dated

Built for developers with 0-4 years of experience and final-year students. High-level design only.

957 pages · PDF · Edition 1