Ever wondered how WhatsApp handles Status, Delete for Everyone, or View Once? 🤔
Before Meta acquired WhatsApp, its core was built on Erlang/OTP — a language designed for massive concurrency and fault tolerance. Perfect for a global messaging platform. Fun facts: ✔ WhatsApp doesn’
Ever wondered how WhatsApp handles Status, Delete for Everyone, or View Once? 🤔
Before Meta acquired WhatsApp, its core was built on Erlang/OTP — a language designed for massive concurrency and fault tolerance. Perfect for a global messaging platform.
Fun facts:
✔ WhatsApp doesn’t store your chat messages.
Messages go straight to the recipient’s device through end-to-end encryption.
That’s why backups live on your phone or cloud — not on WhatsApp servers.
✔ “Delete for Everyone” isn’t deleting stored content.
It simply sends a delete instruction tied to the message ID — so the app knows to remove that message on all devices. 🧹
âś” Status (24 hours)
Encrypted status updates are stored temporarily on WhatsApp’s servers so your contacts can view them.
After 24 hours, the server auto-deletes them — no manual cleanup needed. ⏳
âś” View Once
Media is uploaded encrypted, delivered, viewed one time, and then instantly deleted from both the server and the viewer’s device. 👀❌
WhatsApp is a masterclass in choosing the right technology for scale.
đź’¬ Have you ever worked with Erlang/OTP or built highly concurrent systems?
🤯 Which WhatsApp feature do you think is the hardest to implement?