System Design Study Material
34 interview designs + 30 core concepts — diagrams, scale math, data flow, and trade-offs.
Google SD (12)
- Design YouTube
- Design Google Maps
- Design Google News
- Design Google Global Feature Flags
- Design Google Ads Bidding System
- Design Google Photos Duplicate Detection
- Design Google Docs
- Design Chrome Malware Detection
- Design Gmail Fast Search
- Design Google Trends
- Design Google Street View
- Design Google Global Real-time Analytics
Classic interview SD (22)
- Design URL Shortener
- Design Rate Limiter
- Design WhatsApp & Chat System
- Design News Feed
- Design Twitter
- Design Instagram
- Design Web Crawler
- Design Dropbox / File Storage
- Design Typeahead / Autocomplete
- Design API Gateway
- Design Notification System
- Design Distributed Cache
- Design Ticket Booking (Ticketmaster)
- Design Uber / Ride Sharing
- Design Distributed Search
- Design Distributed Logging
- Design Distributed Task Scheduler
- Design Shared Counter
- Design Quora
- Design Proximity Service
- Design Payment System
- Design ChatGPT System