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WhatsApp Real-Time Messaging
How WhatsApp delivers 100B+ messages/day to 2B+ users with only ~50 engineers using Erlang and XMPP.
1 Lessons
Knowledge Course
Curated Resources
References & Resources
How WhatsApp Handled 1 Billion Users with 50 Engineers
Deep dive into WhatsApp's architectural simplicity and scaling strategy.
How WhatsApp Delivers Messages to 2 Billion Users
Messaging at planetary scale with technical architecture details.
How WhatsApp Handles 40 Billion Messages Per Day
Visual breakdown of WhatsApp's message delivery pipeline.
How WhatsApp Handles 100 Billion Messages Daily
Comprehensive system architecture deep dive.
Designing WhatsApp
Architecture analysis from the High Scalability archive.