Design, build, and operate secure, resilient AWS infrastructure and multi-tenant platforms. Own Terraform infrastructure-as-code, CI/CD pipelines, Kubernetes environments, networking, IAM, observability, reliability, and security controls. Lead infrastructure initiatives end to end, collaborate closely with Engineering, support incident response and SRE practices, and contribute to architecture decisions. The role also supports Microsoft 365, zero-trust networking, SOC 2, and Cyber Essentials Plus compliance activities.