Member of Technical Staff (AI Researcher)
Core
Research and engineer large-scale LLMs and agent systems to power AI-powered search and agent experiences.
Role type
Senior IC AI Research Scientist / Engineer
Builds
SOTA LLMs, Deep Research Agent, Comet Agent, and Search products
Domain
Generative AI, Large Language Models, Reinforcement Learning
Deliverable
production ML models
Required skills
Large-scale LLM development, Deep Learning systems, Post-training techniques (SFT/DPO/GRPO), Reinforcement Learning, Python, PyTorch
Preferred skills
C++/CUDA programming, LLM training framework development, Agent systems, Multi-step reasoning, Personalization, Academic publications
Technologies
Megatron, PyTorch
Responsibilities
Post-train SOTA LLMs using supervised and reinforcement learning techniques, Leverage query/answer datasets to scale model performance, Implement preference optimization and personalization capabilities, Invent in-house improvements to enhance SOTA models, Turn research ideas into algorithms and run experiments, Own full-stack data, training, and evaluation pipelines, Build robust training frameworks for post-training LLMs, Integrate models seamlessly into the product ecosystem
Seniority
Mid-to-Senior, hands-on IC
