Principal Applied Scientist, Conversational Assistant Modeling & Learning

Alexa AI is looking for a Principal Applied Scientist to lead the science behind Alexa, Amazon's LLM-powered conversational assistant. You will own the technical direction for key initiatives spanning large language model fine-tuning, alignment, agentic reasoning, and evaluation — directly shaping the experience for hundreds of millions of customers worldwide. As a Principal Scientist, you are a hands-on technical leader. You define research directions, design and run rigorous experiments, and …