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Promptfoo - Senior/Staff Engineers, Security Researchers, GTM & Founding Operators - REMOTE (North America) / Hybrid San Mateo CA - Full-time - https://promptfoo.dev

Promptfoo is the MIT-licensed open-source toolkit 125 000+ developers use to evaluate and secure LLM apps. We just closed an $18.4 M Series A led by Insight Partners with participation from a16z and are scaling a small, senior team of high-agency builders.

Open roles

• Senior / Staff Full-stack Product Engineer (TypeScript + Python)

• Senior / Staff AI Security & Red-Team Engineer

• Solutions Architect / SE (multiple)

• Product Marketing Manager (cyber focus)

• Enterprise Account Executive (Bay Area, multiple)

• Technical Writer

• Developer Advocate

Why join

• Build the definitive AI security stack already used at 30+ Fortune 500s.

• Work in open source.

• Competitive salary, meaningful equity, async-friendly culture of ownership.

How to apply

1. Skim https://github.com/promptfoo/promptfoo then run:

  npx promptfoo@latest init --example getting-started

2. Email careers@promptfoo.dev with subject “HN – July 2025”, a short intro, and a GitHub / LinkedIn link.

3. I reply to every thoughtful application and send swag to anyone who tries or contributes to Promptfoo.

Careers page: https://www.promptfoo.dev/careers/

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