Senior Linux Systems Administrator

Role overview Own the day-to-day reliability, security, and upkeep of a broad infrastructure estate as a senior individual contributor. The scope runs from Linux servers, storage, and virtualization through networks, cloud resources, and self-hosted development systems; the role also leads incident response and operational improvements.

Responsibilities - Build, configure, harden, and maintain Linux systems, including access controls, services, packages, and operating-system lifecycle updates. - Operate physical servers, virtual machines, and containers; manage storage, capacity, hardware issues, and configuration consistency. - Run and troubleshoot network services such as routing, firewalls, DHCP, DNS, and connectivity between data centers, cloud resources, and remote staff. - Manage cloud resources and self-hosted engineering tools, including source control, CI runners, build machines, and package mirrors. - Diagnose production issues using logs, metrics, and command-line tools; lead incident response, document findings, and complete follow-up fixes. - Automate provisioning and routine operations with scripts and configuration management, keeping changes in version control and deploying through review.

Requirements - At least 8 years of hands-on systems administration experience and deep Linux troubleshooting skills, including kernel, filesystem, systemd, performance, and networking issues. - Practical experience operating physical Linux servers, virtualization, containers, storage, and server lifecycle upgrades. - Strong networking knowledge covering routing, firewalls, DHCP, DNS, and secure remote access. - Experience administering AWS resources, especially compute and object storage, and operating self-hosted Git and CI services. - Proficiency in Bash and working knowledge of Python; experience maintaining Ansible or comparable configuration-management automation. - Strong security and operational judgment, including patching, least privilege, change planning, rollback, incident documentation, and clear written English.

Nice to have - Server management controllers, RAID, data-center operations, GPU infrastructure, alternative virtualization platforms, or SAN/NAS storage. - Monitoring and intrusion detection, build farms, package caches, backup systems, compliance controls, Debian-based systems, or additional cloud providers.

Benefits and work setup - Full-time, remote individual-contributor position in the United States. U.S. citizenship is required. - Listed base salary is $125,000–$165,000 annually, plus equity and benefits.