Investigate ambiguous signals and vulnerabilities from bug bounty, application and supply-chain scanners, penetration tests, cloud detections, and internal reports; determine exploitability, exposure, and impact; coordinate remediation; validate fixes and bypasses; and hunt for variants and root causes. Deep, hands-on AWS and Azure security experience in production SaaS or cloud-native systems, including identity and authorization, network controls, encryption and key management, secrets, logging and detection, containers or Kubernetes, serverless services, infrastructure as code, and multi-tenant data isolation.