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# Linux system administrator

- **Company:** Mixvoip's Saga
- **Location:** Belgium
- **Contract:** Permanent contract
- **Skills:** Proxmox, Artificial Intelligence, Bash Shell, Configuration Management, Python (Programming Language), Networking Basics, Routing, Virtual Local Area Networks, Wireless Networks, Ceph (Software), Scripting, Saltstack, Firewalls (Computer Science), AI Coding Agents
- **Published:** October 27, 2026
- **Apply:** https://www.mixvoip.com/company/career/linux-system-administrator/

## About the Role

* Solid Linux fundamentals; Linux is your daily operating system
 * Basic experience or strong interest in virtualization (Proxmox is a plus)
 * Interest in storage systems; experience with Ceph is a plus
 * Comfortable working with many services and systems (not just a few servers)
 * Basic scripting skills (bash, python, or similar) and an automation mindset
 * Familiar with configuration management concepts (SaltStack preferred, or similar tools)
 * Able to troubleshoot methodically and communicate clearly
 * Comfortable working in production environments where uptime matters
 * Comfortable using AI coding tools (e.g., Codex) as part of daily work, * Hands-on experience with Proxmox in production (even small clusters / labs count)
 * Hands-on experience with Ceph (even small clusters / labs count)
 * Experience with SaltStack (states, pillars, grains, orchestration) or similar tools
 * Understanding of monitoring/alerting and incident handling
 * Experience with networking basics (VLANs, routing, firewalls)
 * Strong documentation habits and clean operational work

## Description

You will join the System Administration team and take part in the daily operation of our production infrastructure.
This is a hands-on role. You will work with Proxmox and Ceph and help operate a production cluster running around 1000 virtual machines that power our services. A big part of the job is keeping systems stable: monitoring, troubleshooting, upgrades, maintenance windows, and fixing issues before they become incidents.
You won't be "thrown in alone", but you are expected to take ownership of what you touch, document what you change, and improve things over time.
A 24/7 rotating on-call is part of the job., * Help operate and maintain Proxmox production clusters

 * Help troubleshoot and maintain Ceph storage (health, capacity, recovery)
 * Maintain and troubleshoot Linux virtual machines and the services running on them
 * Handle incidents and participate in the on-call rotation (24/7)
 * Use SaltStack for configuration management and operational tasks
 * Support infrastructure changes, upgrades, and expansions
 * Document systems, procedures, and changes