HN Jobs

Promptfoo | Senior/Staff Software Engineer | SF Bay Area or Remote (US) | Full-Time | AI Security & Open-Source About Us: Promptfoo is building the leading open-source toolkit for testing and evaluating large language models (LLMs). We are a small, high-impact team backed by Andreessen Horowitz, shaping the future of AI safety. Trusted by over 40,000 developers, we focus on making LLMs safer, more reliable, and robust with tools for red teaming and pentesting AI. Preferred Qualifications: - Ability to work independently, ship features quickly, and prioritize effectively. - Proficiency in Python and TypeScript; experience with LLMs or open-source projects is a plus. - Strong background in AI/ML with a passion for security engineering. Check out our GitHub to explore our work. To apply, email careers@promptfoo.dev with “HN” in the subject line, your GitHub/LinkedIn, and a brief note on why Promptfoo excites you. We will respond to every email. Preference will be given to applicants who have tried or contributed to Promptfoo.