Frontier GenAI Scientist & RL Gym Lead

Amazon Inc.; Seattle (WA); On-site; USD 199,000 - 309,000; Full time

Job summary

Amazon.com Services LLC is seeking a Principal Applied Scientist to shape training and evaluation assets for frontier GenAI with LLMs. You will lead RL gym development, design experiments, and scale tooling for model training.

The role combines hands-on research with strategic leadership, mentoring senior engineers and scientists while aligning cross-functional teams toward high-value AI objectives. The position emphasizes deep learning, reinforcement learning, and large-scale distributed

Qualifications

• PhD or Master's with significant applied research in ML
• Strong hands-on experience building ML models and systems
• Experience with RL environments, RL gyms, or agentic tool-use systems

Responsibilities

• Set technical direction for RL gyms, data collection, sampling, and evaluation
• Design and lead experiments to measure model improvements
• Build gym-building tooling and automated quality control at scale
• Advance evaluation methodologies for training-time use
• Lead and mentor other scientists and engineers
• Collaborate with cross-functional teams to convert real-world problems into high-value tasks
• Contribute to hiring and development of junior staff

Skills

Java

C++

Python

Reinforcement learning

Deep learning

Education

PhD in Computer Science or related field

Tools

TensorFlow

PyTorch

Job description

Amazon.com Services LLC is seeking a Principal Applied Scientist to shape training and evaluation assets for frontier GenAI with LLMs. You will lead RL gym development, design experiments, and scale tooling for model training.

The role combines hands-on research with strategic leadership, mentoring senior engineers and scientists while aligning cross-functional teams toward high-value AI objectives. The position emphasizes deep learning, reinforcement learning, and large-scale distributed