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Amazon · Sunnyvale, CA

Sr. Applied Scientist, Frontier AI Assets

US, CA, SunnyvaleSenior individual contributorResearch & Science

Listed on Amazon’s official careers site. Posted September 29, 2026. Check that it is still open and apply there.

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Job description

The Foundational AI (FAI) team is looking for a passionate, talented, and inventive Applied Scientist with a strong deep learning background, to build industry-leading Generative Artificial Intelligence (GenAI) technology with Large Language Models (LLMs).

Key job responsibilities

As an Applied Scientist with the FAI team, you will support the development of RL Gyms, assess their usefulness for the frontier model advancement and build techniques to advance the state of the art with LLMs. You will support the foundational model development in an applied research role. Your work will directly impact our customers in the form of products and services that make use of GenAI technology. You will leverage Amazon’s heterogeneous data sources and large-scale computing resources to accelerate advances in LLMs.

A day in the life

You start your morning reviewing experimental results from a model training run you kicked off the previous afternoon, analyzing metrics and refining your approach. By mid-morning, you are whiteboarding a new algorithmic design with engineering partners, working through system integration details. After lunch, you lead a science review where you present findings and gather feedback from peers. Later, you pair with a junior scientist to debug a data pipeline issue, turning it into a coaching moment.

Your day wraps up drafting a section of a research paper capturing your team's latest results.

About the team

The FAI team has a mission to push the envelope in GenAI with LLMs, in order to provide the best-possible experience for our customers.

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