Data Scientist, Codex

About the TeamCodex is OpenAI’s first-party developer product focused on agentic software engineering. We’re building tools that help engineers design, write, test, and ship code faster—safely and at scale. We partner tightly with research and product to translate model advances into tangible developer productivity.About the RoleAs a Data Scientist on Codex, you will measure and accelerate product-market fit for AI developer tools. You’ll define what “developer productivity” means for our product, run experiments on new coding models and UX, and pinpoint where the model helps or hurts across languages and tasks. Your insights will directly shape how an entire industry builds software.This role is based in San Francisco, CA. We use a hybrid work model of 3 days in the office per week and offer relocation assistance to new employees.In this role, you willEmbed with the Codex product team to discover opportunities that improve developer outcomes and growthDesign and interpret A/B tests and staged rollouts of new coding models and product featuresDefine and operationalize metrics such as suggestion acceptance, edit distance, compile/test pass rates, task completion, latency, and session productivityBuild dashboards and analyses that help the team self-serve answers to product questions (by language, framework, repo size, task type)Diagnose failure modes and partner with Research on targeted improvements (model quality signals, user feedback, evals)You might thrive in this role if you have5+ years in a quantitative role at a developer-facing or high-growth productFluency in SQL and Python; comfort with experiment design and causal inferenceExperience defining product metrics tied to user valueAbility to communicate clearly with PM, Eng, and Design—and to influence product directionYou could be an especially great fit if you haveStrong programming background; ability to prototype, run simulations, and reason about code qualityFamiliarity with IDE/extension telemetry or developer tooling analyticsPrior experience with NLP/LLMs, code models, or evaluations for generative codingAbout OpenAIOpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity. We are an