Beyond “Reversing an Array”: The Real Engineering Happens in Architecture
As you grow in tech, your problems shift from syntax to system architecture. Think about WhatsApp — handling 400B+ messages daily. How do you design a system that supports messaging, calls, view-once
Beyond “Reversing an Array”: The Real Engineering Happens in Architecture
As you grow in tech, your problems shift from syntax to system architecture.
Think about WhatsApp — handling 400B+ messages daily.
How do you design a system that supports messaging, calls, view-once media, delete-for-all, and zero downtime?
What do you store?
How do you scale?
What happens when services fail?
👉 This is the level where real engineering happens.
It’s not about writing functions — it’s about designing systems that never break.
In my next post, I’ll explain the tech stack Meta uses to power WhatsApp.
💬 What’s the biggest system-design challenge you’ve ever worked on?
What Is Frontend?
👆 The Buttons You Tap, The Screens You Scroll — That’s Front
Frontend is the User Interface.
If the end user can:
See it
Tap it
Swipe it
Click it
Complain that it’s not loading 😅
…then that’s Frontend.
When you open:
your bank app
your browser
your dashboard at work
Everything you’re interacting with visually = Frontend.