OpenAI

Backend Software Engineer (Evals)

OpenAI • $130K — $155K *
Seattle, WA 98115In-Person
Enterprise Technology
Less than 5 years of experience
Today
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Job Overview by Ladders

Qualifications

  • 4+ years of backend engineering experience in product-driven environments
  • Proficiency in Python, FastAPI, and Postgres
  • Experience in designing and scaling distributed systems and APIs
  • Background in building AI agents or applications, particularly in eval design
  • Familiarity with evaluation methods for LLMs and multi-agent workflows
  • Experience in creating production evals for ML/LLM models
  • Pragmatic mindset with a focus on iterative development.

Responsibilities

  • Design reliable and extendable eval pipelines
  • Build infrastructure for continuous eval monitoring frameworks
  • Develop and maintain backend services and APIs for automation
  • Integrate and structure data for optimized use in AI workflows
  • Collaborate with data, research, and engineering teams on model integration
  • Own the full development lifecycle of backend systems
  • Focus on scalability and maintainability while iterating on new ideas.

Benefits

  • Collaborative and cross-functional work environment
  • Opportunity to work on cutting-edge AI technologies
  • Focus on building impactful systems that enhance automation
  • Access to a diverse range of projects and challenges
  • Support for professional growth and development.
Full Job Description
About the Role

We're looking for a Backend Software Engineer with experience working in ML/LLM-heavy domains to help to design and build an evals infrastructure that measures the quality of OpenAI's support automation. This is a deeply technical and highly cross-functional role where you'll build robust systems and backend services that serve as the foundation for how knowledge is created, accessed, and applied across OpenAI. The role will especially focus on working closely with Data Science and Research partners to design and build evals at scale.

In this role, you will:
  • 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

You might be a great fit if you have:
  • 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

About OpenAI

OpenAI is an artificial intelligence research laboratory consisting of the for-profit corporation OpenAI LP and its parent company, the non-profit OpenAI Inc. The company was founded in 2015 by a group of technology leaders, including Elon Musk, Sam Altman, Greg Brockman, Ilya Sutskever, and John Schulman. OpenAI's mission is to develop and promote friendly AI for the betterment of humanity. The company has developed a number of cutting-edge AI technologies, including GPT-3, a language processing system that can generate human-like text. OpenAI has received funding from a number of high-profile investors, including LinkedIn co-founder Reid Hoffman and venture capitalist Peter Thiel.
Learn more about OpenAI
Size
100 employees
Industry
Information Technology
Founded
2015
* Ladders Estimates

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