principal machine learning Applied Scientist tech_leadership 5+ yrs Phd's · Posted Oct 24, 2025

About this role

Amazon is hiring a principal-level Applied Scientist in the machine learning function based in Palo Alto, CA. The posting calls out experience with LLMs, NLP, Reinforcement Learning, Data Structures and roughly 5+ years of relevant work. Listed education preference: a Ph.D. or equivalent.

Role
Applied Scientist
Function
machine learning
Level
principal
Track
Tech leadership
Employment
Full-time
Location
Palo Alto, CA
Experience
5+ years
Education
Ph.D. preferred
Department
Applied Science
Posted
Oct 24, 2025
AI Summary
Lead 50+ builders developing agentic AI applications for Amazon advertisers. Design science roadmap for recommendation and guidance systems using fine-tuning, reinforcement learning, and preference optimization. Requires PhD in Computer Science/Statistics and 5+ years building ML-based recommender systems with AI/NLP expertise.

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Job description

from Amazon careers

The Sponsored Products and Brands team at Amazon Ads is re-imagining the advertising landscape through industry leading generative AI technologies, revolutionizing how millions of customers discover products and engage with brands across Amazon.com and beyond. We are at the forefront of re-inventing advertising experiences, bridging human creativity with artificial intelligence to transform every aspect of the advertising lifecycle from ad creation and optimization to performance analysis and customer insights. We are a passionate group of innovators dedicated to developing responsible and intelligent AI technologies that balance the needs of advertisers, enhance the shopping experience, and strengthen the marketplace. If you're energized by solving complex challenges and pushing the boundaries of what's possible with AI, join us in shaping the future of advertising. Key job responsibilities The Principal Applied Scientist in Advertiser Guidance team will lead 50+ builders in pioneering a new generation of agentic AI applications for Amazon advertisers. You will define and lead the science roadmap of developing agentic experiences for recommendations and guidance delivered to +1.6MM Sponsored Products and Brand advertisers across multiple channels (Ad Console, Sales-managed, and 3P partners). You will work at the forefront of applied AI, developing methods for fine-tuning, reinforcement learning, and preference optimization,…

This is an excerpt. Read the full job description on Amazon careers →
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