How WhatsApp Delivers 100 Billion Messages a Day

How WhatsApp Moves 100 Billion Messages a Day 📱 Your phone keeps one persistent TCP connection open to a chat server. Each server runs Erlang on FreeBSD and holds about 2 million connections, and a routing table maps every user to a server so your message hops from server to server and drops onto your friend's phone. Nothing stays stored once it's delivered. No cloud backup means a deleted chat is gone for good. Fair design, or a dealbreaker? Tell us below 👇 #WhatsApp #SystemDesign #HowWhatsAppWorks #Erlang #FreeBSD #DistributedSystems #BackendEngineering #Scalability #SoftwareEngineering #TechExplained #KodeKloud #DevOps