Principal Machine Learning Scientist
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Job Description
Our client is a leading product-led technology company building next-generation AI-powered platforms at scale, serving millions of users globally. They are heavily investing in AI, Search, and Personalization. We are hiring a Principal Machine Learning Scientist to lead their core AI initiatives.
Role Overview
We are looking for a visionary Principal ML Scientist with deep expertise in Recommendation Systems, User Search, and AI Agentic Model Development.
This is a high-impact, individual-contributor + tech leadership role where you will architect and own the AI strategy for discovery, search relevance, and autonomous agent experiences. You will work directly with Product, Engineering, and Research leadership to solve ambiguous, large-scale problems.
What You Will Do
1.
Recommendations & Personalization Design, build and scale state-of-the-art recommendation and ranking systems (candidate generation, ranking, re-ranking) Drive personalization strategies to improve user engagement, retention, and conversion Work on large-scale user behavior modeling, collaborative filtering, deep learning based recommenders 2.
AI Agentic Systems Lead the design and development of Agentic AI models - autonomous agents capable of reasoning, planning, tool-use, and multi-step execution Build LLM-based agents, orchestration frameworks, memory, and evaluation systems for real-world applications Research and implement RAG, function calling, and agentic workflows at production scale 3.
User Search & Discovery Own and improve the end-to-end User Search stack - query understanding, retrieval, semantic search, ranking and relevance Apply LLMs, embeddings, and vector search to build next-gen intelligent search experiences Define and track search quality metrics and drive continuous improvements 4.
Leadership & Impact Act as a Principal Scientist and thought leader - mentor senior scientists and engineers Drive research to production - from prototyping to deployment on large-scale distributed sy
Required Skills
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