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Backend Software Engineer, Cooperative AI (Evals)

OpenAI· Applied AI
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San Francisco, Seattle$266k - $445kFull-timePosted 11mo ago

About the role

Backend Software Engineer role focused on building an evals infrastructure to measure the quality of OpenAI’s support automation, collaborating with Data Science and Research teams to design scalable evals and backend systems.

Responsibilities

  • Design eval pipelines that are reliable, reproducible, and extendable
  • Build the infrastructure for continuous eval monitoring frameworks (regression/drift monitoring, building robust golden datasets) along with feedback loops that ultimately strengthen support automation
  • Design, build, and maintain backend services and APIs to support intelligent automation and knowledge systems
  • Integrate and structure data across internal platforms, transforming it into formats optimized for use by downstream systems and AI workflows
  • Collaborate closely with data, research, and engineering teams to integrate OpenAI models into high-leverage workflows
  • Own the full development lifecycle of new backend systems and internal platform capabilities
  • Build with scale and maintainability in mind, while rapidly iterating on new ideas

Qualifications

  • 4+ years of backend engineering experience at product-driven companies (excluding internships)
  • Proficiency in backend technologies. Our tech stack includes Python, FastAPI, and Postgres
  • Experience designing and scaling distributed systems, APIs, or data processing pipelines
  • Have experience building AI agents or applications, including designing evals and improving performance through prompting or scaffolding
  • Are familiar with evaluation methods for LLMs and have worked with patterns like multi-agent workflows, tool use, or long context.
  • Experience creating production evals and/or measuring performance of ML/LLM models at scale
  • A pragmatic mindset. You’re comfortable shipping iteratively while building toward a long-term vision

Skills

Required:Backend engineeringDistributed systems designAI/LLM evaluation

Benefits

  • Medical, dental, and vision insurance for you and your family, with employer contributions to Health Savings Accounts
  • Pre-tax accounts for Health FSA, Dependent Care FSA, and commuter expenses (parking and transit)
  • 401(k) retirement plan with employer match
  • Paid parental leave (up to 24 weeks for birth parents and 20 weeks for non-birthing parents), plus paid medical and caregiver leave (up to 8 weeks)
  • Paid time off: flexible PTO for exempt employees and up to 15 days annually for non-exempt employees
  • 13+ paid company holidays, and multiple paid coordinated company office closures throughout the year for focus and recharge, plus paid sick or safe time
  • Mental health and wellness support
  • Employer-paid basic life and disability coverage
  • Annual learning and development stipend
  • Daily meals in our offices, and meal delivery credits as eligible
  • Relocation support for eligible employees
  • Additional taxable fringe benefits, such as charitable donation matching and wellness stipends
Last updated Oct 22, 2026. Interested? Apply on the company site.

About OpenAI

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Company profileWebsite

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