6d ago · 7 min read · 10,000 people are inside a concert venue. While the show is on (cache is warm), the exits are irrelevant — nobody needs them. The moment the show ends (cache TTL fires), all 10,000 people head for the
Join discussionFeb 11 · 4 min read · Welcome back to our System Design Series. If you’ve ever built an application that started small but suddenly gained a surge of traffic, you’ve likely faced the "Scaling Wall." Your server is gasping for air, latency is spiking, and your users are se...
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Dec 9, 2025 · 2 min read · Books System Design Interview (Vol. 1 & 2) by Alex Xu: Amazon Vol. 1 | Amazon Vol. 2 – Structured guide for interviews; pair with AI for practice. Designing Data-Intensive Applications by Martin Kleppmann: Amazon – Deep dive into distributed system...
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Sep 8, 2025 · 3 min read · Just so you know, here is some math: Active Users on Instagram: 2000000000 ❌ Solution 1: Lookup in the database by username We can have a column username with 2 billion rows and an index on the username column, and we can run an exists query which wi...
Join discussionApr 12, 2025 · 5 min read · Welcome to the first post in our series on Basic System Design Concepts! If you're diving into the world of system architecture, you're about to discover why a well-designed API Gateway can be the unsung hero of your infrastructure. In today's post, ...
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Apr 5, 2025 · 3 min read · System Design Explained Like You're 5 (But Smarter!) Hey there! 👋Are you someone who's heard the term "System Design" but feels like it's a mystical beast only interviewers and senior devs understand? Don’t worry—I’ve got your back!Let’s break it do...
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