System Design Solutions
Explore real-world system design problems and their solutions. Each design includes architecture diagrams, scalability considerations, and trade-off analysis.
Chat System
Build a real-time messaging platform with scalability and reliability
WebSocketsMessage QueuesScalability
Upgrade to UnlockSocial Media Feed
Create a high-performance feed system for millions of users
CachingRanking AlgorithmsScalability
Upgrade to UnlockLive Comments
Build a real-time comments system for live events
WebSocketsReal-time UpdatesScaling
Upgrade to UnlockGoogle Drive
Design a cloud storage platform with file synchronization
File StorageSync AlgorithmsConflict Resolution
Upgrade to UnlockCalendar System
Design a shared calendar platform with registration, scheduling, and cross-user availability.
RegistrationSchedulingAvailability
Upgrade to UnlockGame Leaderboard
Build a real-time leaderboard system for gaming platforms
RankingReal-time UpdatesCaching
Upgrade to UnlockFood Delivery
Design a complete food delivery platform like DoorDash
GeolocationReal-time TrackingPayment Systems
Upgrade to UnlockPayment System
Build a secure payment processing system
SecurityTransactionsCompliance
Upgrade to UnlockTicketmaster
Design a ticket booking system with millions of concurrent users
ConcurrencyInventory ManagementScalability
Upgrade to UnlockWeb Crawler
Design a distributed web crawler for search indexing
Distributed SystemsCrawling StrategyData Processing
Upgrade to UnlockDesign Siri
Build a voice assistant system with NLU and command execution
Speech RecognitionNLPReal-time Processing
Upgrade to UnlockDesign a Shopping Cart
Placeholder for a complete shopping cart design covering inventory, pricing, and checkout consistency.
Cart StateInventoryCheckout
Upgrade to UnlockIoT (Internet-of-Things) Log Processing Platform
Placeholder for an upcoming platform that ingests, processes, and analyzes logs from connected devices at scale.
IoT IngestionStream ProcessingObservability
Upgrade to UnlockLearning Path
Start with fundamental concepts in the System Design Basics course, then explore these solutions to see how those concepts are applied in real-world systems.
Go to System Design Basics