System Design Case Studies for Interviews

Practice complete designs from requirements and capacity estimates through architecture, bottlenecks, failures, and trade-offs.

• Design a URL Shortener

  Read-heavy lookup, caching, replication, and sharding.

• Design a Social Bookmarking Service

  Tags, cache partitioning, and data growth.

• Design a Coding Contest Platform

  Sandbox workers, queues, traffic spikes, and leaderboards.

• Design Facebook News Feed

  Fanout, feed caches, hot users, and ranking.

• Design Google Typeahead

  Tries, precomputation, caching, and low latency.