CareerPlan

Principal Applied Scientist, Search & Assistant, Prime Video Personalization and Discovery

Seattle, Washington, United StatesFull-time$199k–$309k2026-06-29 → 2026-11-13

Core

Lead the strategy for applying foundation models and LLMs to evolve Prime Video's search and discovery systems, making them smarter, faster, and more efficient for hundreds of millions of global customers.

Role type

Principal Applied Scientist (Search & Assistant)

Builds

LLM-powered search and discovery experiences, agentic workflows, and Gen AI customer experiences

Domain

Streaming entertainment, Generative AI, Large Language Models (LLMs)

Deliverable

production ML models

Required skills

Predictive modeling, LLMs and generative retrieval, model fine-tuning, model distillation, inference optimization, deep learning, reinforcement learning, algorithm design, A/B test design, technical leadership, mentorship

Preferred skills

Novel algorithm creation, advancing state of the art, peer-reviewed scientific contributions

Technologies

Java, C++, Python, LLMs, foundation models

Responsibilities

Lead strategy for applying foundation models and LLMs across search and discovery; Advance LLM-based and generative retrieval approaches; Make LLM-powered experiences efficient and scalable; Invent, prototype, and productionize large-scale AI solutions; Explore and deliver agentic workflows and Gen AI customer experiences; Provide technical leadership and influence product vision; Design and lead high-impact A/B tests and data analyses; Raise the technical bar through mentorship and design reviews; Publish impactful research at top-tier venues

Seniority

Principal, strategic leadership with hands-on IC work