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We are looking for an AI Engineer to modernize and enhance our existing regex/keyword-based ElasticSearch system by integrating state-of-the-art semantic search, dense retrieval, and LLM-powered ranking techniques. This role will drive the transformation of traditional search into an intelligent, context-aware, personalized, and high-precision search experience . The ideal candidate has hands-on experience with ElasticSearch internals , information retrieval (IR) , embedding-based search , BM25 , re-ranking , LLM-based retrieval pipelines , and AWS cloud deployment . .