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Showing posts with the label LinkedIn engineering

How WhatsApp Made Key Transparency Work (And Why It Matters)

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How WhatsApp's Key Transparency Changed the Game for Encrypted Messaging Okay so let's talk about something actually important for once - how WhatsApp made their encryption more trustworthy without making us jump through hoops. You know how every messaging app claims to be "secure" these days? Well WhatsApp actually put their money where their mouth is with this Key Transparency thing. Let me explain why this matters more than you might think. Visual from their tech docs - looks complicated but trust me it's cool The Big Problem Nobody Talks About So we all know WhatsApp uses end-to-end encryption. Great. But here's the sketchy part nobody mentions - how do you REALLY know you're talking to who you think you are? Like, what if: Some hacker swapped the encryption keys without you knowing? There's a middleman reading your messages right now? The app itself got compromised somehow? Scary stuff right? That's where Key Trans...
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How LinkedIn Finally Fixed Their Messaging Mess (And Why It Took So Damn Long)

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Let’s be real - LinkedIn messaging used to suck. You’d get notifications that didn’t make sense. Messages showing up in weird places. That awkward moment when someone replies to a message you can’t even find. But after 2 years of work, the eng team finally cleaned up this hot mess. Here’s the inside story you won’t find in their press releases. Old vs New - spot the difference! The Hot Mess Era Back in 2020, LinkedIn’s messaging was held together with duct tape: 3 different codebases for messages (why??) Notifications that sometimes... just didn’t notify Group chats that exploded if someone left Search? Forget about it One engineer told me: “We had so many message types even we didn’t know how they worked.” Yikes. The Breaking Point Three things forced them to act: 1. Users complained about lost job offers (!!!) 2. Mobile app ratings tanked to 3.2 stars 3. New features took 6+ months to ship Something had to give. The Great Unification Project The ...
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