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Predict Item Category

System Design · Walmart Labs · Medium

Requirements Functional: Accept an unlabeled item (title, description, structured attributes, images) and return a predicted category path within Walmart's taxonomy, a confidence score, and optionally the top-K alternative categories. Non-functional: Latency must be in the tens of milliseconds on the write path (item onboarding). Throughput must handle catalog ingestion spikes. Support an offline batch mode for backfilling historical items. Provide per-category accuracy…

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