System Design · Snapchat · Medium
Design the backend service that supplies a short-video feed for a client where users swipe vertically through full-screen clips. Limit the scope to the feed-delivery path that powers the swipe up/down experience; upload, editing, and social graph features are outside this exercise. The service should meet these functional requirements: A client request returns an ordered list of video IDs along with only the minimal metadata needed to display each entry. Endless…
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