Ownership: technical ownership of the Linux server environment, including architecture, configuration management, patching, monitoring, backup and recovery, and hardening, plus leadership of infrastructure projects such as platform migrations, new site standups, and environment consolidations as the company grows. Architect, administer, and maintain Linux server environments (physical, virtual, and cloud), including provisioning, configuration, patching, monitoring, and lifecycle management across Red Hat-family and Debian-family distributions.