May 30 · 7 min read · Have you ever sent a message while your phone was in airplane mode and noticed that the message still appeared instantly in the chat? At first, it feels a little strange. If there is no internet conne
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Dec 16, 2025 · 3 min read · WhatsApp has begun rolling out a missed call update designed to improve how users notice, understand, and respond to unanswered calls. The change affects one of the app’s most frequently used features—voice and video calling. With millions of calls p...
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Dec 1, 2025 · 4 min read · WhatsApp is no longer just a messaging app—it is rapidly evolving into an AI-powered communication and productivity platform. With billions of users relying on it for personal conversations, community engagement, and business communication, the platf...
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May 18, 2025 · 3 min read · Real-time + Horizontal Scalability Introduction When I first started building this chat app, there was one requirement I had in mind: it has to be real-time, scalable, and easy to scale up. Sounds easy—until you introduce multiple servers to the mix...
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