#W2 Requirement Required SkillsStrong experience in e-commerce search / search relevance systemsHands-on expertise in Learn to Rank (LTR) modelsExperience with vector similarity search / semantic searchProficiency in PythonExperience with ML libraries:scikit-learnXGBoostTensorFlow or PyTorchExperience with search platforms:ElasticsearchSolr or VespaFamiliarity with ANN frameworks:FaissAnnoyMilvusStrong understanding of:Information Retrieval conceptsRanking algorithmsRelevance metrics (NDCG, MAP,