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Research Engineer / Research Scientist, Post-Training

San Francisco💼 Full-time🗓 2025-12-01 → 2026-09-26

Core

Research and develop improvements to pre-trained models for deployment into ChatGPT and the API, focusing on reinforcement learning and product integration.

Role type

Research Engineer / Research Scientist (Post-Training)

Builds

Production-ready AI models for consumer products (ChatGPT, API)

Domain

Artificial Intelligence / Large Language Models / Reinforcement Learning

Deliverable

production ML models

Required skills

Machine learning engineering, model capability improvement, evaluation design, codebase debugging, reinforcement learning

Preferred skills

Novel model development, product-driven research mindset

Technologies

Large language models, reinforcement learning frameworks

Responsibilities

Own and pursue a research agenda to improve model capability and performance; Build robust evaluations for tracking modeling improvements; Design, implement, test, and debug code across the research stack

Seniority

Individual Contributor (IC)

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