Promptfoo is the MIT-licensed open-source toolkit 100 k+ developers use to evaluate and secure their LLM apps. We are funded by top investors and operate as a tight, all-senior team of high-agency builders, former founders, and owner-operators.
10+ open roles - Senior Full-stack Product Engineer (TypeScript + Python) - Solutions Engineer / Architect (multiple positions available). - Senior / Staff Applied-ML & LLM Security Engineer - Red-Team Researcher - Developer Advocate / DevRel - COO / Chief of Staff - Product Marketing (Cybersecurity experience preferred) - Account Executives (Cybersecurity sales background preferred, Bay Area Required)
Even if none of these titles fit exactly, reach out — we hire great builders.
How to apply
1. Skim https://github.com/promptfoo/promptfoo and run
`npx promptfoo@latest init --example getting-started`
2. Email careers@promptfoo.dev with subject line “HN” and a short, personalized intro
(LinkedIn, resume, or GitHub link welcome).
3. I reply to every thoughtful application and will send swag if you try (or contribute to) Promptfoo.
– Michael, co-founder/CTO