System Design
Master scalable system architecture with real-world examples, diagrams, and comprehensive trade-off analysis.
Rate Limiter
Design a high-performance distributed rate limiting system for API protection and traffic management
URL Shortner
Design a URL shortening service that provides compact, unique URLs with analytics and redirection capabilities
Dropbox
Design a cloud storage system that allows file upload, sync, sharing, and versioning at large scale
Google Docs
Design a collaborative document editing system with real-time sync, conflict resolution, and offline support
Google Maps
Design a global mapping service with navigation, search, and real-time traffic updates at massive scale
Design a social media platform for sharing images and videos with feeds, stories, and social interactions
Job Scheduler
Design a distributed job scheduling system to run and monitor batch and periodic tasks efficiently
Auction System
Design a system to host real-time auctions with bidding, price updates, and transaction handling at scale
Quora
Design a question-and-answer platform with real-time features, content recommendation, and community moderation
Ad Clicks
Design a system to collect, aggregate, and analyze ad click events in real-time to drive reporting and fraud detection
Robinhood
Design a real-time stock trading platform that supports orders, portfolios, market data, and notifications
Strava
Design a fitness tracking platform that collects activity data, provides analytics, and social sharing features
Ticketmaster
Design a ticketing system to sell event tickets with seat selection, payment processing, and high-concurrency handling
Top K Items
Design a distributed system to track and query Top K items / heavy hitters across various time windows with real-time updates
Design a microblogging platform to post, follow, and interact with real-time content feeds at scale
Uber
Design a ride-hailing platform with real-time matching of riders and drivers, pricing, and tracking
Web Crawler
Design a distributed web crawler for search engines that can index billions of web pages efficiently and respectfully
Design an end-to-end encrypted messaging system with real-time delivery, group chats, and media sharing
Yelp
Design a local business review platform that supports search, reviews, ratings, and recommendation at scale
YouTube
Design a video streaming platform with upload, transcoding, recommendation, and live streaming features