Senior Staff Backend Software Engineer, Codex for Finance

About the Team Codex for Finance is a specialized team within OpenAI’s B2B Applications organization. B2B Applications builds and operates the products that bring our cutting‑edge research to millions of companies and developers worldwide. We power the OpenAI API and the Enterprise products that empower people around the world to do their jobs better and more efficiently. Our teams span product engineering, backend infrastructure, and safety, working together to ensure that OpenAI’s technology is delivered with reliability, security, and a world‑class user experience. About the Role We’re looking for backend engineers to help design and scale the systems that will drive the future of AI in finance. We’re a small, specialized team operating like a startup within OpenAI, and we’re looking for like‑minded builders to join us. On March 5, we launched ChatGPT for Excel — just the first step in what we’re building in this space. In this role, you will: Own the end‑to‑end development lifecycle for new platform capabilities and integrations with other systems Collaborate closely with product, design and external customers to understand problems and implement effective solutions Work with the research team to improve our next‑generation models Your background might look something like: 7+ years of professional engineering experience (excluding internships) in relevant roles at tech and product‑driven companies Former founder, or early engineer at a startup who has built a product from scratch is a plus Proficiency in one or more backend languages (e.g., Python, Go, Rust, Typescript or similar) and distributed systems concepts. Enjoy building infrastructure that supports billions of requests and petabytes of data. Care deeply about reliability, safety, and performance in production environments. Interest in AI/ML (direct experience not required) Proven ability to thrive in fast‑growing, product‑driven companies by effectively navigating loosely defined tasks and managing competing priorities or deadlines. Title note: At OpenAI, research and engineering hires share the internal title Member of Technical Staff . We use Senior Staff externally to signal the depth of experience, ownership, and technical leadership expected for this role. About OpenAI OpenAI 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 equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic. For additional information, please see OpenAI’s Affinitive Action and Equal Employment Opportunity Policy Statement. #J-18808-Ljbffr