System Design Case Studies

Design a video streaming platform supporting video upload, transcoding, storage, and adaptive bitrate streaming to millions of concurrent viewers.

Design a ride-sharing platform with real-time driver matching, ETA calculation, surge pricing, and payment processing.

Design a messaging platform supporting 1-on-1 chat, group messaging, media sharing, and end-to-end encryption for billions of users.

Design a web search engine with crawling, indexing, ranking, and serving components to handle billions of queries per day.

Design a recommendation system that personalizes content for hundreds of millions of users across different contexts.

Design a file synchronization service that keeps files consistent across multiple devices with efficient sync and deduplication.

Design a photo-sharing social network with feed generation, stories, direct messaging, and content discovery.

Design a payment processing system that handles card payments, bank transfers, and digital wallets with PCI compliance.

Design a stock exchange matching engine that processes millions of orders per second with sub-millisecond latency.

Design a trading platform that supports algorithmic trading, real-time market data, order management, and risk management.

Design a ledger system for a digital bank that handles account balances, transactions, and reconciliation.

Design a real-time fraud detection system that analyzes transactions and blocks fraudulent activities.

Design a cryptocurrency exchange with order matching, wallet management, and blockchain integration.

Design a distributed caching system that provides low-latency access to frequently accessed data.

Design a notification system supporting push notifications, email, SMS, and in-app notifications at scale.

Design a distributed job scheduler that handles millions of scheduled jobs with exactly-once execution.

Design a logging system that ingests, stores, and queries billions of log entries per day.

Design a metrics collection and monitoring system with alerting, dashboards, and anomaly detection.

Design a real-time data pipeline that processes millions of events per second with exactly-once semantics.

Design a cloud data warehouse that supports petabyte-scale analytics with SQL interface.

Design an ML platform for training, serving, and monitoring machine learning models at scale.

Design a live streaming platform supporting millions of concurrent viewers with low latency.

Design a real-time leaderboard system for competitive gaming with millions of players.

Design a real-time collaborative document editor supporting multiple concurrent editors.

Design an e-commerce platform with product catalog, shopping cart, checkout, and order management.

Design a ticketing platform that handles high-demand ticket sales with fairness and scalability.

Design an IoT platform that manages millions of devices with telemetry, commands, and OTA updates.

Design an authentication and authorization system supporting SSO, OAuth, and multi-factor authentication.