> Markdown version of [/jobs/ext/4615571-founding-engineer](https://www.wearedevelopers.com/jobs/ext/4615571-founding-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 Engineer - **Company:** FOUNDR LLC - **Location:** San Mateo, CA, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Training Data, Artificial Intelligence, Cyber Security, Data Ingestion, Large Language Models, Backend, Juniper - **Published:** November 7, 2026 - **Apply:** https://www.careerbuilder.com/job-details/founding-engineer-san-mateo-ca--7e358fc7-f2e7-4ff7-bbb4-9012f2133af1 ## About the Role Artificial Intelligence (AI), Security Infrastructure, Risk, Juniper Networks M-Series, Computer Security, Training Data Sets, Data Modeling, Startup, * 5+ years shipping production software, with strong fundamentals * Has built productised AI systems: LLMs, agents, retrieval, evals * Fluent in AI-driven development workflows, beyond experiments * Comfortable across backend, data and infrastructure; startup experience preferred * Bias for ownership and speed, with real energy in how you collaborate ## Description * The semantic data model behind consistent answers across security tools and datasets * Backend, data ingestion and infrastructure work as needed * Rapid iteration with security teams using the product daily in production * The push from investigation to automated remediation