Senior Security Software Engineer

Security Software Engineer | AI Infrastructure Startup San Francisco, CA (On-Site) $200K–$350K Base + Significant Equity Visa Sponsorship Available A rapidly growing, venture-backed AI infrastructure company is seeking a highly technical Security Software Engineer to build and own security from the ground up. This is a rare opportunity to join a founding-level engineering team working at the intersection of security, infrastructure, and artificial intelligence. The company partners with leading AI organizations to support large-scale data creation, model development, and agentic workflows, requiring innovative approaches to securing highly sensitive systems and data. What You'll Do 🔒 Design and implement security infrastructure across AWS and GCP environments ⚙️ Build automated systems for threat detection, incident response, and security operations 🤖 Secure AI-specific data pipelines, model interaction layers, and training workflows 🚀 Integrate security controls directly into engineering workflows without slowing development velocity 🏗️ Contribute to core infrastructure and platform engineering initiatives beyond security 📋 Establish and execute the company's security roadmap while helping define long-term security strategy What We're Looking For ✅ 4–7 years of experience in security engineering, infrastructure engineering, or related fields ✅ Strong software engineering skills with Python, Go, and/or TypeScript ✅ Experience securing cloud-native environments in AWS and/or GCP ✅ A builder's mindset—someone who develops security systems and automation rather than relying solely on commercial tools ✅ Ability to thrive in a fast-paced startup environment with significant ownership and autonomy Why This Role? • Founding-level impact and visibility • Work on cutting-edge AI infrastructure challenges • Join a highly technical, talent-dense engineering team • Significant equity upside and competitive compensation • Opportunity to define security practices at a company experiencing rapid growth If you're passionate about building security systems that protect next-generation AI platforms and want to have a direct impact on a company's trajectory, I'd love to connect.