system-design

A great app experience isn’t just built on clean code—it’s built on visibility. You can’t fix what you can’t see.

In the real world, networks are unreliable. Users refresh or hit the “Submit” button multiple times. Services retry requests automatically…

Nowadays, Authentication is a critical function in modern applications, serving as the gateway to safeguard data and resources. In this…

Configuring a connection pool is a common area where developers often make mistakes. There are several principles involved in the process…

Recently, I have read an article to encourage avoid using UUIDs, but i'm still big fan for uuid due to its simplicity. Using UUIDs offers…