// TOPIC
#cdn
4 articles
◆◆◆AdvancedByteDanceMeta
01Design TikTok / Reels (short-video platform)
A vertical-swipe video feed that feels infinite and clairvoyant. Two-tower retrieval, real-time ranking with Monolith, sub-200ms playback via aggressive preloading, and the For You Page that knows you in 90 seconds.
#interview#video#recommendation
22 min◆BeginnerGitHubPastebin.com
02Designing Pastebin
A simple service for sharing text snippets — and a surprisingly rich design problem. Storage strategy, expiry, syntax highlighting, abuse prevention.
#case-study#storage#url-shortener
18 min◆◆◆AdvancedMetaInstagram
03Design Instagram (photo sharing)
A photo-first social network — uploads, image processing, feed, stories, and global delivery.
#interview#feed#storage
18 min◆◆◆AdvancedGoogleNetflix
04Design YouTube / Netflix (video streaming)
How a billion users watch ~1 billion hours of video a day. Upload pipeline, transcoding, adaptive bitrate, CDN, recommendation.
#interview#video#cdn
17 min