The search for is, in spirit, a search for the most efficient, visual, and high-yield path to passing the system design interview. The answer remains Alex Xu's System Design Interview – An Insider's Guide (Volumes 1 & 2) .

If you’ve searched for you’re likely preparing for a senior engineering interview. The correct author is Alex Xu , and his two books have become the gold standard for cracking system design rounds at FAANG and top-tier tech companies.

When to use Read-through, Write-through, or Cache-aside patterns.

In the high-stakes world of FAANG (Facebook, Amazon, Apple, Netflix, Google) and Tier-1 tech interviews, one phase separates the seasoned engineers from the pretenders:

Alex Wu spends the last chapters on what not to do:

"System Design Interview: An Insider’s Guide" by Alex Xu is considered a top-tier resource for engineering interviews, offering a structured 4-step framework and 16 real-world case studies. The guide, along with its sequel and machine learning edition, features over 180 diagrams to explain complex concepts like scaling, caching, and rate limiting. For a PDF excerpt and community notes, view the file on