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Design a query understanding system for search.

Query understanding is the front end of search that turns a raw query into structured intent. Get it wrong and even a perfect index returns garbage. The signal is the pipeline and how you measure it. Here is the design.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Query understanding is the front end of search that turns a raw query into structured intent. Get it wrong and even a perfect index returns garbage. The signal is the pipeline and how you measure it. Here is the design.

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Next in this trackDesign a real-time feature pipeline / feature store for online ML.Next in this trackHow do you handle the cold-start problem in a recommendation system?Next in this trackHow do you balance relevance and diversity in a ranking/recommendation list?

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