Research Engineer, Codex
Core
Advancing capabilities, performance, and reliability of AI coding models through research, experimentation, and system optimization to help users write better code faster.
Role type
Research Engineer specializing in AI coding models and system optimization
Builds
State-of-the-art AI systems for code generation, reasoning, and agentic behavior deployed in products like ChatGPT and the API
Domain
Artificial Intelligence, Large Language Models, Software Engineering, Cloud Infrastructure
Deliverable
production ML models | product features | infrastructure
Required skills
Large language model expertise, software engineering, system performance optimization, ML systems operation, cloud infrastructure management, prototyping, debugging complex issues
Preferred skills
Experience with agent behavior, LLM inference, container orchestration, balancing speed/cost/user experience, working in ambiguous iterative environments
Technologies
LLMs, container orchestration, cloud infrastructure
Responsibilities
Design and run experiments to improve code generation and agentic behavior; Develop research insights into model training, alignment, and evaluation; Address inefficiencies across the system stack from agent behavior to inference; Build tooling to measure, profile, and optimize system performance at scale; Prototype new capabilities and ship improvements to production
Seniority
Individual Contributor, hands-on research and engineering