Senior Software Engineer, Product & AI Security at Gusto

This role is ideal for a seasoned backend engineer with at least 7 years of experience who sits at the intersection of infrastructure and security. You should have a deep background in building large-scale distributed systems, specifically focusing on identity management (AuthN/AuthZ) and data protection. This isn't just a "checker" role; it’s a builder role where you will develop the platforms that allow AI and product teams to ship safely. The compensation is competitive for the San Francisco market, offering up to $210,000 in base salary plus equity. You’ll be working in a hybrid environment (2-3 days on-site in SF) on a high-leverage team that is currently defining how a major fintech handles the emerging risks of LLMs and AI production services. **You might be a good fit if you...** * Have extensive experience with SAML, SSO, RBAC, and modern policy engines like OPA or SpiceDB. * Are proficient in Ruby, Python, or Kotlin and enjoy building secure APIs and high-availability services. * Are excited about solving "ambiguous" AI security problems, like threat modeling for LLMs. * Prefer a hybrid work style and can commute to a San Francisco office a few times a week.