Agentic AI Scientist, Fulfillment Tech (LLM + RL)

Amazon

Bellevue (WA)

On-site

USD 143,000 - 193,000

Full time

2 days ago

Be an early applicant

Application generator

Don’t send a generic resume — generate a resume and cover letter tailored to this exact role.

Get past ATS filters

Benefits offered by this job

Health insurance

401(k) matching

Paid time off

Parental leave

RSUs

Job summary

Amazon.com Services LLC in Bellevue, WA is seeking an Applied Scientist to lead the development of agentic systems for operational decision making and orchestration. You will build full agentic systems with multi-agent orchestration, tool use, memory and action execution, and train LLMs using rejection sampling, SFT and RL methods.

You will evaluate systems offline and online, mentor interns, and publish findings.

Qualifications

3+ years of building models for business applications.
PhD or Master’s with 4+ years in CS/CE/ML.
Experience programming in Java, C++, Python.
Experience in algorithms and data structures, parsing, numerical optimization, data mining, parallel and distributed computing, high-performance computing.

Responsibilities

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.