Software Engineer, API Frontiers

OpenAI
New York, San Francisco
Workplace: HybridFull timeUSD 266,000 - 445,000 annuallyFunction: Software EngineeringExperience: 5+ yearsSkills: ["Communication","Collaboration","Product judgment","Developer empathy","Ownership"]

Build and operate backend services that power the Responses API, turning frontier model capabilities into reliable production APIs. Partner with Research, Safety, Codex, and other API teams to define API behavior and deliver safe, staged launches. Develop agent workflow capabilities (delegation, context sharing, parallel execution) and improve long-running reliability, performance, and observability based on production learnings and developer feedback.

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FursaFursa
OpenAI
OpenAI
16 hours ago

Software Engineer, API Frontiers

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Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 14 minutes agoStatus: Live

Job Summary

Build and operate backend services that power the Responses API, turning frontier model capabilities into reliable production APIs. Partner with Research, Safety, Codex, and other API teams to define API behavior and deliver safe, staged launches. Develop agent workflow capabilities (delegation, context sharing, parallel execution) and improve long-running reliability, performance, and observability based on production learnings and developer feedback.
Location: New York, San Francisco
Workplace: Hybrid
Employment Type: Full time
Job Function: Software Engineering
Seniority: Mid level

Key Responsibilities

  • •Design, build, and operate APIs and backend services delivering frontier model capabilities to developers.
  • •Partner with Research, Safety, Codex, and API teams to define API behavior and execute safe, staged launches.
  • •Build agent workflow capabilities such as task delegation, context sharing, and parallel execution.
  • •Improve reliability for long-running requests across timeouts, cancellation, streaming, and background execution.
  • •Enhance request-processing performance and tail latency using profiling, efficient systems code, and persistent connections.

Pay and Benefits

Salary: USD 266,000 - 445,000 annually
Equity and Bonus:Equity
Perks:Equity

Key Requirements

  • •5+ years building and operating backend services or developer-facing APIs in production.
  • •Strong software engineering fundamentals, including distributed systems, concurrency, and asynchronous execution.
  • •Ability to diagnose production failures and performance bottlenecks using observability data and profiling.
  • •Product judgment and developer empathy, translating complex capabilities into clear, dependable APIs.
  • •Clear communication and effective collaboration across engineering, research, product, and safety teams.
Experience:5+ years
Skills:CommunicationCollaborationProduct judgmentDeveloper empathyOwnership
Tech Stack:RustStreaming protocolsWebSockets

Company Brief

OpenAI
Develops and deploys advanced generative AI models (including ChatGPT and DALL·E) and AI infrastructure, providing APIs and consumer products to accelerate safe AGI for broad benefit.
Industry: AI & Machine Learning
Company Size: Enterprise (1,001+ employees)
Revenue: USD 1B+
Growth: Scaleup
Valuation: Hectocorn (USD 100B+)
Funding: Series E+
Headquarters: San Francisco, United States
Founded: 2015
Glassdoor
Glassdoor: 4.4
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