Open Design Google NewsDesign Google NewsMid-Level·Cursor Pagination·Scaling Reads·Cache(Redis)·Really Simple Syndication(RSS)·Webhooks·Redis Sorted SetAmazon
Open Design Web CrawlerDesign Web CrawlerHard·Message Queue(Amazon SQS)·Rate Limiting·Cache(Redis)Amazon
Open Design WhatsAppDesign WhatsAppHard·Redis Pub/Sub·Handling Large Blobs·Real-time Updates·WebSocketAmazon
Open Design TicketmasterDesign TicketmasterHard·Scaling Reads·Real-time Updates·Virtual Waiting Queue·Elasticsearch·Optimistic Concurrency Control (OCC)Amazon
Open Design InstagramDesign InstagramHard·Fan-out on Write·CDN·Caching·Fan-out on Read·Handling Large BlobsAmazon
Open Design LeetCodeDesign LeetCodeMedium·Virtual Machine(VM)·Container(Docker)·Serverless Function·Redis Sorted Set·Message Queue·Real-time UpdatesAmazon
Open Design URL shortenerDesign URL shortenerEasy·Base62 Encoding·Cache(Redis)·CDN·Scaling ReadsAmazon
