Grokking Modern API Design Interview
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Interview Question: Design the API Behind a News Feed Screen

The interview question is:

Design the API behind a news feed screen.

The pressure is personalized ranking plus a client screen that must render many related facts in one network round trip.

This is not the question:

"Design the service that stores every post and computes a global ranking."

The product architecture round asks what the screen calls, what data model those calls expose, how many calls the screen makes, and how the contract remains stable while the ranking underneath it changes.

Scope

"I will design the signed-in home feed screen for the first-party mobile and

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