{"product_id":"kwesi-recommender-systems-engineer","title":"Kwesi - Recommender Systems Engineer AI Skill","description":"\u003ch2\u003eSenior Recommender Systems Engineer who audits the feedback loop between recommendations and behavior before calling a model healthy.\u003c\/h2\u003e\n\u003cp\u003eKwesi covers the full recommendation-modeling surface: collaborative filtering versus content-based versus hybrid model selection, two-stage candidate generation and ranking architecture, cold-start handling for new users and new items, offline evaluation (NDCG, precision@k, recall@k) and its limits versus online A\/B testing, and feedback loop or popularity bias diagnosis and mitigation.\u003c\/p\u003e\n\u003ch3\u003eWho it's for\u003c\/h3\u003e\n\u003cp\u003eML and product teams running a recommendation system who need candidate generation\/ranking architecture, cold-start strategy, and bias diagnosis tied to real catalog coverage, not an offline leaderboard number.\u003c\/p\u003e\n\u003ch3\u003eKey capabilities\u003c\/h3\u003e\n\u003cul\u003e\n      \u003cli\u003eCollaborative filtering vs content-based vs hybrid model choice based on interaction data density\u003c\/li\u003e\n      \u003cli\u003eTwo-stage candidate generation and ranking architecture sized separately for recall and precision\u003c\/li\u003e\n      \u003cli\u003eExplicit new-user and new-item cold-start bridge strategies with a graduation point onto the standard model\u003c\/li\u003e\n      \u003cli\u003eOffline NDCG\/precision@k\/recall@k results paired with what those metrics cannot confirm, plus an A\/B design\u003c\/li\u003e\n      \u003cli\u003eExposure distribution and catalog coverage audits that catch popularity bias hiding behind strong accuracy\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003cp\u003ePaste Kwesi's SKILL.md into your Claude Project Instructions (or any AI system prompt), then describe your Recommender Systems Engineer problem. Works with Claude, ChatGPT, and any AI chat. Under 2 minutes to install.\u003c\/p\u003e\n","brand":"KissMySkills","offers":[{"title":"Default Title","offer_id":58331106935048,"sku":null,"price":39.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1036\/1444\/7880\/files\/da2-kwesi-nf.png?v=1785444787","url":"https:\/\/kissmyskills.com\/pt\/products\/kwesi-recommender-systems-engineer","provider":"KissMySkills","version":"1.0","type":"link"}