May 31 · 10 min read · Every time you open Instagram, record a Reel, apply a filter, save it as a draft, and come back later to finish editing, the experience feels seamless. But behind that smooth flow is a sophisticated m
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May 30 · 7 min read · Have you ever recorded a Reel on Instagram, spent several minutes editing it, and then decided to save it as a draft instead of posting it immediately? You close the app, come back a few hours later,
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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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May 29 · 6 min read · Introduction Have you ever sent a WhatsApp message while your phone was in airplane mode and noticed that the message still appeared instantly in the chat? Even though the recipient did not receive it
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May 23 · 12 min read · Modern mobile applications are no longer “just screens connected together.” Apps like Instagram, WhatsApp, Uber, and Netflix are massive distributed systems running inside a phone. They handle: Milli
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