Applied Scientist - LLM, Alexa Conversational Modelling Intelligence

Description
As an Applied Scientist II in the Alexa Conversational Modelling Intelligence team within Alexa AI, you will drive model post-training for Large Language Models that power Alexa+. You'll adopt and adapt state-of-the-art techniques — including supervised fine-tuning, RLHF, and preference optimization — running rigorous experiments and translating findings into production-ready solutions that directly improve the customer experience for millions of users worldwide.

You will own the full model development cycle from data curation through training, evaluation, and deployment. Your day-to-day will involve developing evaluation methods and metrics, diagnosing model defects, and iterating on recipes to move concrete quality and efficiency benchmarks. You'll write clean, reproducible code, contribute to shared tooling, and collaborate closely with scientists and engineers to bring models from experimentation to scale.

You are technically curious, experiment-dri...