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Articles tagged with #messaging
A senior deep dive into WhatsApp: two billion devices on live connections, store-and-forward delivery, end-to-end encryption, group sender keys, and the reconnect storm, with 15 diagrams.
How a cloud messaging service keeps chats in sync across devices and fans a single post out to millions of subscribers. Covers the sync model, fanout strategies, and the read trade-offs.
WhatsApp famously ran with a tiny engineering team while serving a huge chunk of the planet. A lot of that came down to a few deliberate design choices, and most of them are worth stealing.
