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Applied Scientist, RL post-training, AWS

Seattle, Washington, United States💼 Full-time💰 $142,800–$193,200🗓 2026-09-25

Core

Develop Reinforcement Learning (RL) post-training solutions for frontier Large Language Models (LLMs) to enhance instruction following, reasoning over long context, and tool use for cloud computing customers.

Role type

Applied Scientist (RL post-training)

Builds

Production LLM capabilities and research findings

Domain

Cloud computing, Artificial Intelligence, Reinforcement Learning

Deliverable

production ML models | research

Required skills

Reinforcement Learning, Large Language Models, numerical optimization, parallel and distributed computing, high-performance computing, algorithms and data structures, data mining, Java, C++, Python

Preferred skills

Unix/Linux, professional software development

Technologies

Java, C++, Python

Responsibilities

Develop innovative RL post-training solutions for LLMs, partner with technology and business teams to solve real-world problems, publish findings at peer-reviewed conferences and journals

Seniority

Senior, hands-on IC

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