System Design - How Real Apps Like Swiggy and Instagram Are Actually Built

<p>You open Instagram.Your feed loads. You like a post. You follow someone.Every single one of those actions is a REST API call happening behind the screen.</p> <p>College taught

<p>You open amazon.com. A product page loads in under a second. Behind that single page load, your request hit a DNS server, bounced through a CDN edge node, passed a rate

<h1> Message Queues Explained: Why LinkedIn Built Kafka and Changed Async Communication Forever </h1> <blockquote> <p><strong>Covers:</strong> Point-to-Point vs Pub-Sub, Kafka

<p>Most applications don't fail because of bad code.</p> <p>They fail because of bad architecture decisions made early that nobody questioned <br /> until it was too late.</p>

<p>Eight months ago I was frustrated. I do strength training, <br /> running, and BJJ — and I needed three different apps to <br /> track everything. Strava for runs, Strong for

<p>You take a photo.</p> <p>You open Instagram.</p> <p>You select the photo, write a caption, and tap <strong>Post</strong>.</p> <p>A few seconds later, the photo appears on your

<p>I was reading a discussion on Reddit the other day that made me wonder whether system design is truly important for backend developers or just something emphasized in

<blockquote> <p>"A HashMap is not valuable because it is fast. It is valuable because it makes the right things fast."</p> </blockquote> <p>In the previous articles, we built our