Senior Software Engineer, Platform Security

About the Role

We're hiring our founding Platform Engineer, Security to design, build, and operate the security infrastructure that powers Decagon's AI platform. This is a builder's role: you'll spend your time creating durable, well-engineered systems including paved paths for secure service creation, security tooling that automatically applies secure configurations, and infrastructure-as-code that makes it easy for every engineer at Decagon to do the right thing.

In this role, you will

• Design and implement secure, multi-tenant infrastructure that isolates customer data while enabling efficient AI model serving across our platform
• Build "golden paths" for security including service templates, libraries, terraform policies, and automation, so new services are secure and production-ready by default
• Own infrastructure-as-code (Terraform) and GitOps best practices, including reusable modules and policy-as-code
• Expand and help operate the platforms behind alerting detection, secrets management, IAM, and automated remediation, integrating them cleanly into CI/CD and developer workflows
• Partner with Security, Infrastructure, and product engineering teams to translate enterprise and compliance requirements (SOC 2, ISO 27001, GDPR) into reliable, automated technical controls
• Participate in security on-call and continuously raise the bar on operability, runbooks, and incident learnings