Design Instagram StoriesSystem designDesign the stories feature of a photo and video app: users post photos or short videos that their followers can view for 24 hours, after which they disappear. At the top of the…
Last asked Sep 2026
#feeds
- Design post privacy and visibility controlsSystem designDesign privacy settings for posts on a social network: an author chooses who can see each post (public, friends, friends of friends, custom lists, excluding certain people), and…Last asked Feb 2026
Design news search and feeds without MLSystem designDesign a first version of a news app's search and article feeds without any learned models. Cover ingesting articles from publishers, building the search index, ranking by simple…Last asked Dec 2025- Data model for feed posts and sharesSystem designModel the data behind a social feed where people create posts and share other people's posts. Name the entities (users, posts, shares and so on), design the fact and dimension…Last asked Dec 2025
- Design keyword search over postsSystem designUsers publish short posts or status updates; others search them by keyword, including over years of history, and see the matching posts ranked. Cover ingesting new posts into the…Last asked Oct 2025
Design a GitHub-like developer communitySystem designDesign the user-facing community side of a GitHub-like site: profiles, following people and repositories, stars, activity feeds and notifications. The interviewer stressed very…Last asked Sep 2025- Design a model that predicts posts a user will dislikeML designDesign a model for a news feed that predicts which posts a user would dislike or hide, so ranking can show fewer of them. Cover the labels (explicit negative feedback is rare)…Last asked Sep 2025