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Backend Software Engineer, B2B Applications

OpenaiMillbrae, CAMay 21st, 2026
Backend Software Engineer – B2B ApplicationsOpenAI's B2B organization builds and operates the products that bring our cutting-edge research to millions of companies and developers worldwide. We power the OpenAI API and 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.We're looking for backend engineers to design and scale the systems that drive our developer and enterprise-facing products. In this role, you'll architect and maintain the services and infrastructure that power OpenAI applications—from large-scale distributed systems and databases to APIs and data pipelines. You'll collaborate closely with product, research, and infrastructure teams to bring new AI capabilities to production while ensuring performance, safety, and compliance at global scale.In This Role, You WillOwn the end-to-end development lifecycle for new platform capabilities and integrations with other systemsCollaborate closely with product, design and external customers to understand problems and implement effective solutionsWork with the research team to improve our next-generation modelsYour Background Might Look Something Like7+ years of professional engineering experience (excluding internships) in relevant roles at tech and product-driven companiesFormer founder or early engineer at a startup who has built a product from scratch – a plusExperience with one or more backend languages (Python, Go, Rust, TypeScript, or similar) and distributed systems conceptsEnjoy building infrastructure that supports billions of requests and petabytes of dataCare deeply about reliability, safety, and performance in production environmentsInterest 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 deadlinesSeniority LevelMid-Senior levelEmployment TypeFull-timeJob FunctionEngineering and Information TechnologyIndustriesResearch ServicesCompensation Range$255,000 – $405,000 annuallyAbout 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 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 Affi… Other details about background checks, accommodations, and policy statements remain unchanged.J-18808-Ljbffr