Browse past weeks of engineering reads.
Facebook Reels needed a way to enhance social discovery by surfacing content that friends have interacted with, requiring real-time computation of relationship strength and ranking of friend-engaged content at massive scale.
Messenger needed to protect user privacy when clicking links in chats while still detecting and warning users about malicious URLs, creating a tension between link safety scanning and end-to-end privacy.
Meta needed to handle massive-scale media processing (encoding, transcoding, filtering) across its family of apps, requiring efficient orchestration of complex audio/video pipelines using FFmpeg at an unprecedented scale.