Backend Software Engineer, API Multicloud

Responsibilities

• Build backend and infrastructure systems that extend OpenAI’s API platform into cloud-native environments, like AWS
• Design and ship cloud-contained products that allow customers to use OpenAI capabilities while keeping workloads and data within cloud environments
• Help stand up cloud-hosted Codex experiences powered by the OpenAI Responses API
• Build the infrastructure and runtime abstractions for a stateful, cloud-optimized agentic platform
• Partner closely with external cloud partners as well as internal teams across Codex, Research, and Safety Systems to translate emerging capabilities into production-ready systems
• Improve the reliability, scalability, observability, and operational maturity of the services underpinning these products
• Help shape the technical direction of a new and growing team as it scales from an early core group into a larger engineering organization

Requirements

• 7+ years of professional engineering experience (excluding internships) in relevant roles at tech and product-driven companies
• Proficient in one or more backend languages (e.g., Python, Go, Rust, Typescript or similar) and distributed systems concepts
• Experience building developer tools, especially AI-powered tools
• Excellent technical communication and the ability to shape architectures that support different deployment models
• Experience turning ambiguous, fast-moving technical problems into pragmatic, durable systems
• Experience working with cloud infrastructure primitives and production service ownership
• Proven ability to thrive in fast-growing, product-driven companies by effectively navigating loosely defined tasks and managing competing priorities or deadlines

Nice-to-Haves

• Experience building cloud services
• Experience collaborating cross-functionally with platform, research, safety, or external partner teams
• Interest in AI infrastructure, agentic systems, and developer platforms
• Interest in AI/ML (direct experience not required)