# Backend Software Engineer, Cooperative AI (Evals) at OpenAI

- Company: OpenAI
- What the company does: Backed by Greylock, Insight and Khosla.
- Company website: https://openai.com/
- Type: Startups (AI role)
- Level: Mid level
- Location: San Francisco
- Work setup: On-site
- Pay: $266K to $445K base salary per year (USD)
- Posted: 2026-10-05
- Apply by: 2026-11-19
- Apply: https://jobs.ashbyhq.com/openai/3d064454-c0c3-4225-bc2c-6d8c0f8735b2?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/openai-backend-software-engineer-cooperative-ai-evals/

## 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. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- 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

Tags: Applied AI

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/openai-backend-software-engineer-cooperative-ai-evals/