Often Missing SkillsInformation retrieval fundamentals and relevance metricsHands-on A/B testing design and causal interpretationSearch platform configuration and tuning (e.g., Elasticsearch)SQL for funnel, cohort, and diagnostic analysisPersonalization and recommendation system basics
Development SuggestionsComplete an Elasticsearch fundamentals course and build a demo search app; take an experimentation/causal inference course and run a sample A/B test with real metrics.