Applied Scientist, LLMs & Agentic AI for Alexa+

Amazon; Bellevue (WA); On-site; USD 143,000 - 193,000; Full time

Benefits offered by this job

Health insurance

RSUs

401(k) matching

Paid time off

Parental leave

Job summary

Amazon is seeking an Applied Scientist to advance Alexa+ and related LLM-driven initiatives. You will influence model fine-tuning, alignment, and agentic systems while shaping the experience for hundreds of millions of customers worldwide.

In a fast-paced environment, you will own end-to-end system design and development, create technical roadmaps, and drive production-level projects in collaboration with scientists and engineers across teams. Strong cross-functional communication is essential.

Qualifications

• Master's degree or higher in computer science, machine learning, engineering, or related fields.
• 3+ years of programming in Java, C++, Python or related language experience.
• 1+ years experience with distributed training frameworks and inference engines.
• 3+ years’ experience with modeling languages and tools like PyTorch / TensorFlow, R, scikit-learn, numpy, scipy.
• Solid ML background and familiar with NLU, NLG, and LLM training and evaluation.

Responsibilities

• Improve the efficiency of LLM, VLM, and agent training and evaluation pipelines including distributed training, inference serving, data loading, and memory usage.
• Design, implement, and evaluate LLM fine-tuning, alignment (RLHF, DPO), and distillation for production deployment.
• Architect agentic systems—multi-step reasoning, tool use, planning, and orchestration.
• Develop evaluation frameworks and methodologies beyond standard benchmarks to capture real-world conversational quality.
• Translate research advances into customer-facing products in collaboration with engineering and cross-functional teams.
• Publish results at top-tier venues and represent Amazon in the research community.

Skills

Distributed training

ML/DL frameworks

NLU/NLG

Python

Java

C++

Education

Master's degree or higher in CS/ML/Engineering

PhD in CS/ML/Engineering (preferred)

Tools

VeRL

Megatron

FSDP

DeepSpeed

Ray

vLLM

TensorRT-LLM

Triton

SGLang

TGI

PyTorch

TensorFlow

scikit-learn

Job description

Amazon is seeking an Applied Scientist to advance Alexa+ and related LLM-driven initiatives. You will influence model fine-tuning, alignment, and agentic systems while shaping the experience for hundreds of millions of customers worldwide.

In a fast-paced environment, you will own end-to-end system design and development, create technical roadmaps, and drive production-level projects in collaboration with scientists and engineers across teams. Strong cross-functional communication is essential.