Staff Platform Security Engineer (Security)

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Platform Security Engineer (Security) based in United States. This is a senior, hands-on platform security role focused on protecting critical cloud and infrastructure environments at scale. You will own security across AWS and Kubernetes, securing identities, workloads, control planes, deployment systems, and mission-critical infrastructure. The role combines deep technical execution with architectural influence, automation, incident response, and cross-functional leadership. You will work closely with Infrastructure, SRE, Developer Experience, and engineering teams to build practical controls that strengthen security without slowing product delivery. The environment is fully remote, highly engineering-driven, and designed for people who take ownership of complex security challenges from investigation through verified remediation. You will also help shape an AI-native security function by applying automation and AI-assisted workflows where they can meaningfully improve security coverage and response speed.