Design a Model to Recommend the Board for a Saved Pin

Asked at Pinterest · System Design for ML · Difficulty: Hard · Last asked Nov 11, 2026

Design a model and the system around it that, given the pin a user is currently viewing and the boards (collections) that user already has, predicts the board the user is most likely to save the pin to. The suggestion is shown at the moment the user taps save, so the right board should be the default or near the top of the list.

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