Senior DS/ML Scientist II- Search Science
Core
Designing and implementing state-of-the-art retrieval and ranking systems for an e-commerce search engine, integrating LLMs and multi-objective optimization to balance relevance, revenue, and efficiency.
Role type
Senior IC machine-learning scientist (search & ranking)
Builds
Production search stack (retrieval, ranking, personalization) for Shipt's grocery delivery platform
Domain
E-commerce, Search, Machine Learning
Deliverable
production ML models
Required skills
Multi-task learning (MTL), Learning-to-Rank (LTR), Large Language Models (LLM) integration, Hybrid retrieval (sparse/dense), Multi-objective optimization, Python, SQL, PyTorch or TensorFlow, Feature engineering
Preferred skills
Experience with recommender systems, Generative retrieval methodologies
Technologies
PyTorch, TensorFlow, Python, SQL
Responsibilities
Design and implement multi-task learning models for unified ranking; Analyze datasets to influence search roadmaps; Integrate user signals for deep personalization; Develop LLM-native search features (generative retrieval, query expansion); Tune hybrid retrieval systems for massive catalogs
Seniority
Senior, hands-on IC
