Amazon
Applied Scientist, RL post-training, AWS
$143K–$193K
Seattle, WA · Full-time · Posted Sep 25, 2026
- Experience
- 3+ years building models for business applications; PhD, or Master's degree and 4+ years of CS, CE, ML or related field experience.
- Education
- PhD, or Master's degree and 4+ years of CS, CE, ML or related field experience.
About the job
Conduct research and develop RL post-training methods for frontier LLMs, especially to improve instruction following, long-context reasoning, and tool use for customer service.
What you'll do
- Develop innovative solutions to challenging problems and apply research to real-world customer needs.
- Conduct LLM post-training research on instruction following, long-context reasoning, and tool use.
- Publish findings in peer-reviewed conferences and journals.
What they ask for
- 3+ years of building models for business application experience.
- PhD, or Master's degree and 4+ years of CS, CE, ML or related field experience.
- Experience in patents or publications at top-tier peer-reviewed conferences or journals.
- Programming experience in Java, C++, Python or a related language; experience in at least one of algorithms and data structures, parsing, numerical optimization, data mining, parallel and distributed computing, or high-performance computing.
Nice to have
- Experience using Unix/Linux.
- Experience in professional software development.
Pay
142,800.00 - 193,200.00 USD annually (base salary)
Tools
Java, C++, Python, Unix/Linux
AI focus
RL post-training of frontier LLMs to improve instruction following, long-context reasoning, and tool use.
Model-written summary · the original posting is authoritative