Staff Backend Engineer, Financial Engineering

Financial Engineering (FinEng) builds the financial systems behind ChatGPT, Codex, and OpenAI's API platform. These products serve people, developers, and businesses around the world. The team makes them easy to buy, use, and pay for, supporting everything from individual subscriptions to usage-based billing and complex enterprise agreements. The work spans customer experiences, backend services, and data systems, with opportunities to influence technical design and see your work through to production.

Responsibilities

Design and build systems for purchasing, payments, subscriptions, and billing across OpenAI products and global markets; Build product catalogs, SKUs, and bundles that let product teams launch new offerings and evolve how products are packaged; Develop workspace and entitlement systems that connect purchases and subscriptions to product access for individuals and teams; Keep charges and product access correct when requests are retried, updates arrive late, or another service fails; Build metering systems, data pipelines, and APIs that turn large volumes of usage into accurate bills, timely spending information, and records that are easy to trace and verify; Create reusable building blocks that let product teams launch new offerings, pricing, and payment options without rebuilding the foundations each time; Make complex financial workflows simple for customers and internal teams, using customer feedback and experiments to improve the experience; Scale and evolve live systems while protecting customer access, financial accuracy, performance, and security; Own problems from early design through launch and operation, working with product, design, finance, and other engineering teams to make and test important technical decisions

Requirements

Staff+ level engineering experience; Strong backend experience

Nice to have

Experience in payments, billing, or financial systems; Experience with payments, subscriptions, pricing, billing, or other systems that manage customer purchases and revenue; Experience with product catalogs, packaging and bundles, workspace management, entitlements, or usage metering; Experience building financial or transaction systems at scale, checking that records match across systems, or supporting compliance and audits