system design

A practical guide to optimizing continuous range queries and evaluating two-way array dependencies using prefix and suffix sum arrays in constant time.

Your app is slow, and you're convinced it's a frontend problem. But what if the real culprit is hiding in your database layer — whispering hundreds of queries when one would do? Here's how the N+1 query problem silently kills performance, and how to fix it before your users notice.

Yesterday’s AWS outage reminded everyone that even the cloud has bad days. This post looks at what went wrong, why it matters, and what developers can learn about resilience, dependency, and building systems that stay human — even when they fail.