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Manages and troubleshoots complex Linux, Windows, cloud, networking, virtualization, web hosting, and application infrastructure issues. Responsibilities include infrastructure optimization, automation, CI/CD support, monitoring, security hardening, backups, disaster recovery, incident response, capacity planning, documentation, and technical escalation management. The engineer supports AWS, Azure, and GCP environments, performs root-cause analysis, mentors L1 and L2 teams, and participates in rotational on-call support.

Provides L3 administration and escalation support for Linux hosting and cloud infrastructure. Responsibilities include troubleshooting critical server and network issues, configuring web servers and databases, automating provisioning with scripts and infrastructure tools, managing virtualization and cloud environments, implementing security controls, monitoring systems, responding to incidents, and mentoring support engineers in a 24/7 on-call environment.

Senior L3 Linux System Engineer responsible for escalation and troubleshooting, managing and securing Linux hosting environments, building servers, automation with scripting and IaC, deploying and managing virtualization/cloud (KVM, OpenStack, VMware, Docker/Kubernetes), performing monitoring and incident response, enforcing security best practices, and mentoring L1/L2 teams in a 24/7 production hosting environment.

Lead escalation point for complex hosting incidents; administer and secure Linux servers (CentOS/Ubuntu/RHEL); manage web servers, databases, caching, virtualization and cloud platforms; develop automation (Bash/Python/Perl) and IaC (Ansible/Terraform); implement security and monitoring; mentor L1/L2 staff and participate in 24/7 on-call rotations.