Amazon · 1 day ago
Senior Applied Scientist, Amazon Fulfillment Technology
Bellevue, WA
Full-time
Onsite
Senior Level
$150K/yr - $260K/yr
6+ years expAmazon is a leading company in fulfillment technology, and they are seeking a Senior Applied Scientist to lead the development of agentic systems for operational decision making. The role involves training LLMs, leading research projects, mentoring interns, and authoring academic papers.
Artificial Intelligence (AI)DeliveryE-CommerceRetail
Responsibilities
Generating training and preference data for specific use cases (reasoning trajectories, tool traces)
Reward modeling and policy optimization for LLMs: DPO, IPO, KTO, RLHF/RLAIF with PPO/GRPO, KL control, rejection sampling
Supervised fine-tuning on step-by-step trajectories and tool-use traces
RL for LLMs, Offline RL and off-policy evaluation
Agentic memory/state management; episodic and semantic memory; vector search; grounding with RAG
Evaluation: developing decision quality metrics, scaling LLM-based evaluations
Qualification
Required
3+ years of building machine learning models for business application experience
PhD, or Master's degree and 6+ years of applied research experience
Experience programming in Java, C++, Python or related language
Experience with neural deep learning methods and machine learning
Preferred
Experience in building machine learning models for business application
Benefits
Equity
Sign-on payments
Full range of medical, financial, and/or other benefits
Company
Amazon
Amazon is a tech firm with a focus on e-commerce, cloud computing, digital streaming, and artificial intelligence.
10001+ employees
H1B Sponsorship
Amazon has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
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Trends of Total Sponsorships
2025 (22803)
2024 (21175)
2023 (19057)
2022 (24088)
2021 (12233)
2020 (14881)
Funding
Current Stage
Public CompanyTotal Funding
$8.11BKey Investors
Kleiner Perkins
2023-01-03Post Ipo Debt· $8B
2001-07-24Post Ipo Equity· $100M
1997-05-15IPO
Leadership Team
Douglas J. Herrington
CEO, Worldwide Amazon Stores
Werner Vogels
VP & CTO
Recent News
2026-01-08
Maryland Daily Record
2026-01-08
Company data provided by crunchbase