> Markdown version of [/jobs/ext/4625749-founding-principal-product-security-engineer](https://www.wearedevelopers.com/jobs/ext/4625749-founding-principal-product-security-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Founding Principal Product Security Engineer - **Company:** Endor Labs - **Location:** Boston, MA, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Large Language Models, Software Security - **Published:** November 7, 2026 - **Apply:** https://www.juju.com/job/28_25303_00e230ce0cbf90d1a682b3c1d818445c ## About the Role You will build threat models, guide design reviews, and deploy security agents that improve quality and scale. The role requires 10+ years in security, hands-on experience with LLMs and agents, and the ability to influence senior ## Description Endor Labs in Boston is seeking a founding Principal Product Security Engineer to shape security strategy across the platform. You will work with the Head of Security to align supply chain security, code scanning, and runtime monitoring with the product roadmap.