System Design Interview Preparation: The Complete Roadmap (opens in new tab)

System design interviews are the biggest differentiator between mid-level and senior engineering roles. They test whether you can think about systems holistically: scalability, reliability, trade-offs, and real-world constraints. The problem is that most engineers study by memorizing specific system designs (URL shortener, chat app, etc.) without understanding the underlying patterns. When they get a question they haven't seen, they freeze. This guide takes a different approach. It teaches yo...