@Abhishek-kumar

Networking & Communication in System Design: The Invisible Roads of Your System

Sep 6, 2025 · 3 min read · The Chatty City Imagine a city where every citizen calls everyone directly to ask simple questions. Bob calls Alice, Alice calls Charlie, Charlie calls Dave… and so on. Traffic jams everywhere! 🚦 Then the mayor installs a central message board (a me...

Security & Privacy in System Design: Building Digital Fortresses

Sep 6, 2025 · 4 min read · Imagine you’re designing a futuristic theme park. The rides are thrilling (performance), the park is massive (scalability), and everything runs smoothly (reliability). But—oops!—you forgot to hire security. Soon, random people sneak in without ticket...

Reliability & Fault Tolerance in System Design: Keeping Your System Alive When Everything Goes Wrong

Sep 6, 2025 · 4 min read · Picture this:You’re watching the final over of a World Cup cricket match 🏏, millions of fans glued to the app, and… suddenly the app crashes.The entire country rages. Memes flood Twitter. Your company’s brand takes a beating. What went wrong?👉 The ...

Scalability & Performance in System Design: How to Keep Your System from Crashing When It Gets Famous

Sep 6, 2025 · 4 min read · Imagine this:You build a cute little app where people can rate different types of coffee ☕. On day one, 50 of your friends try it. Everything works perfectly. But one day, a TikTok influencer shares it → suddenly 5 million people hit your app at once...

Caching in System Design: The Art of Remembering Things Fast.

Sep 6, 2025 · 5 min read · 😂 The Forgetful Student and the Cheat Notes There was once a student who had a terrible memory. Every exam, he would forget half the answers by the time the teacher handed out the question paper. One day, he came up with a brilliant idea — he wrote ...