You are building a recommendation system for an e-commerce platform with a large catalog and repeat shoppers. The product team wants better personalized product suggestions across home page, product detail pages, and cart recovery surfaces, while still handling new users and new items.
How would you design a recommendation system for an e-commerce platform?
High Recall@K in retrieval so relevant items reach the rankerStrong NDCG@10 and conversion lift in rankingGood coverage across the catalog, not just popular itemsReasonable handling of cold-start users and products