Senior Staff Backend Software Engineer, Codex for Finance

About the Team Codex for Finance is a specialized team within the company’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 company 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 the company’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 the company, 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 of 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 the company, 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. Equal Opportunity Employer 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. Accommodations We are committed to providing reasonable accommodations to applicants with disabilities. #J-18808-Ljbffr