Your app just hit production. 10,000 users are logged in. Your server stores session data...
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Search across 99 posts, 16 explainers, and 56 topics
How Kafka Works: The Engine Behind Real-Time Data Pipelines
Inside LinkedIn's log that changed how we think about messaging systems
Your company just launched a new feature. Within seconds, millions of events start flooding in:...
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Kubernetes Architecture: The Operating System for the Cloud
How Google's container orchestrator became the backbone of modern software deployment
Six months ago, you had one web app on one server. Today, you have 50...
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How Meta Achieves 99.99999999% Cache Consistency
Inside the architecture that keeps 3 billion users in sync
When you like a friend’s photo on Facebook, that like appears instantly across all their...
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How Slack Built a System That Handles 10+ Billion Messages
Inside the architecture that powers real-time communication for millions
You send a message in Slack, and within milliseconds, it appears on your colleague’s screen...
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Paxos: The Democracy of Distributed Systems
How a simple voting algorithm keeps distributed systems in agreement
Imagine you’re running a bank with branches in New York, London, and Tokyo. A customer...
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Write-Ahead Log: The Golden Rule of Durable Systems
How a simple log file prevents your data from disappearing into the void
Picture this: You’re transferring $500 to your friend through a banking app. You hit “Send,”...
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Building Distributed Counters for High-Traffic Systems
From simple incrementers to battle-tested architectures that handle millions of operations
You’ve probably implemented counters dozens of times. A simple count++ here, a database increment there....
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How Stripe Prevents Double Payments
Learn the engineering patterns that prevent duplicate charges and how to implement them in your payment systems
You’re checking out online. Click “Pay Now”. Nothing happens. Click again. Boom - charged twice....
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From Manual Testing to Automated Excellence: GitHub Actions
Turn your repository into an automated testing and deployment machine that catches bugs before they reach users
Think of GitHub Actions as your digital assistant that never sleeps. Every time something happens...
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55 Million Requests Per Second: Inside Cloudflare's Magic
Picture this: it’s Black Friday, millions of shoppers worldwide are frantically clicking “Add to Cart”...
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How Uber Finds Nearby Drivers at 1 Million Requests per Second
Picture this. You’re standing outside Select City Walk in Saket, tired after shopping, and you...
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