Senior Security Engineer

Security Software Engineer | AI Infrastructure StartupSan Francisco, CA (On-Site)$200K–$350K Base + Significant EquityVisa Sponsorship AvailableA 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 strategyWhat 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 autonomyWhy 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 growthIf 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.