Design the systems that power billions of daily interactions — from personalized feeds to viral content delivery
Design a microblogging platform handling 500M users, 500M tweets/day with real-time fan-out, trending topics, and celebrity user optimization. Covers push vs pull feed generation.
Design a photo/video sharing platform with stories, reels, explore feed, and ML-powered content recommendations. Covers media processing pipelines and CDN strategies.
Design a personalized feed for 2B+ users using ML ranking, multi-source aggregation (friends, pages, groups), and EdgeRank-style algorithms.
Design a community-driven platform with subreddits, threaded comments, voting systems, and Hot/Best/New ranking algorithms.
Design a video streaming platform with adaptive bitrate, transcoding pipelines, recommendation engine, and global CDN delivery.