Hiring: Applied Scientist - Agentic AI, Amazon Fulfillment Technology Company: Amazon Location: Bellevue, WA Job Posted Time: 2026-09-17 05:25:38 Target Skills & Keywords : C++, Fine-tuning, Java, LLM, Linux, Python, RAG, Reinforcement Learning About the job Experience: •3+ years of building models for business application experience •4+ years of CS, CE, ML or related field experience Required Skills: •These systems are deployed to Amazon buildings, and you will also work on rigorous offline and online evaluations. •Your work will leverage the latest LLMs to develop capabilities for agentic reasoning, coding and analytics. You will also lead research projects to tackle unsolved problems, mentor interns, and author academic papers to summarize your findings for external publication. •Generating training and preference data for specific use cases (reasoning trajectories, tool traces) •Reward modeling and policy optimization for LLMs: DPO, IPO, RLHF/RLAIF with PPO/GRPO, rejection sampling. •Supervised fine-tuning on step-by-step trajectories and tool-use traces •Verbal Reinforcement Learning and Continual Learning •RL for LLMs, Offline RL and off-policy evaluation •Agentic memory/state management; episodic and semantic memory; vector search; grounding with RAG. Qualifications: •PhD, or Master's degree and 4+ years of CS, CE, ML or related field experience Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!