Software Engineer, API Frontiers

Highlights

• Build and operate the Responses API powering developer products and agents.
• Bring new frontier model capabilities from research into safe production launches.
• Make long-running agent workflows dependable, fast, and easy to use.

What they offer

• Equity

Ideal candidate

Product-minded backend engineer who loves turning complex model capabilities into dependable developer experiences and owning ambiguous problems through to lasting production fixes.

Requirements

• 5+ years of experience building and operating backend services or developer-facing APIs in production.
• Strong software engineering fundamentals, with practical knowledge of distributed systems, concurrency, and asynchronous execution.
• Ability to diagnose production failures and performance bottlenecks using observability data and profiling.
• Product judgment and developer empathy, with a track record of translating complex capabilities into clear, dependable APIs.
• Experience taking ownership of ambiguous technical problems, from defining an approach through shipping and improving the result.
• Clear communication and effective collaboration across engineering, research, product, and safety disciplines.
• Experience with Rust, streaming protocols or WebSockets, or long-running workflow systems is a plus.