Linux & Proxmox Architect for Scalable Infra

Applied-Optoelectronics-Inc; Sugar Land (TX); On-site; USD 90,000 - 130,000; Full time

Benefits offered by this job

Health benefits

401(k) match

Relocation packages

Generous PTO

Job summary

Applied Optoelectronics, Inc. (AOI) is seeking a hands-on Linux & Proxmox Systems Administrator to manage and secure our Linux server and virtualized infrastructure in a fast-paced, on-site manufacturing environment in Sugar Land, TX.

You will handle Proxmox VE clusters, VMs, containers, storage, backups, monitoring, and automation. The ideal candidate has strong Linux fundamentals, Proxmox experience, and the ability to troubleshoot across virtualization, storage, networking, and OS layers.

Qualifications

• 3+ years of professional Linux systems administration experience, including Proxmox VE.
• Experience administering Proxmox VE clusters, including high availability (HA), backup and restore, and storage integration (Ceph, ZFS, NFS, or iSCSI).
• Experience managing virtual machines and LXC containers, including migration, snapshots, and performance tuning.
• Strong knowledge of Linux operating systems, including kernel tuning, boot processes, and package management.
• Proficiency in Bash shell scripting and at least one additional scripting language, such as Python, Perl, or Ruby.
• Solid understanding of networking concepts, including TCP/IP, DNS, DHCP, VLANs, firewalls, and load balancing.
• Knowledge of system security best practices, including SELinux, AppArmor, and iptables/firewalld.
• Familiarity with monitoring and observability tools such as Zabbix, Nagios, Prometheus, or Grafana.
• Experience with backup and recovery tools such as Veeam, Proxmox Backup Server, or rsync.
• Strong systems thinking, analytical, troubleshooting, and problem-solving skills, with a detail-oriented and proactive approach to system maintenance.
• Excellent written and verbal communication skills, with the ability to work effectively in a collaborative environment.
• Ability to work independently while managing multiple time-sensitive priorities.
• Willingness to participate in an on-call rotation and respond to critical incidents as needed.
• Experience with containerization technologies such as Docker and Kubernetes.
• Knowledge of configuration management tools such as Ansible, Puppet, or Chef.
• Familiarity with cloud platforms such as AWS, Microsoft Azure, or Google Cloud Platform (GCP).
• Understanding of Infrastructure as Code (IaC), particularly Terraform.
• Experience with CI/CD pipelines and related tooling.
• Relevant certifications such as LPIC, RHCSA, RHCE, or Proxmox certifications.

Responsibilities

• Install, configure, maintain, and troubleshoot Linux servers across production and development environments.
• Deploy, configure, and manage Proxmox VE clusters, including cluster nodes, quorum, high availability (HA), QEMU/KVM virtual machines, and LXC containers.
• Create, migrate, snapshot, back up, and restore virtual machines and containers while monitoring resource utilization and optimizing performance.
• Manage storage technologies integrated with Proxmox VE, including Ceph, ZFS, NFS, iSCSI, and SAN/NAS storage.
• Maintain and upgrade Proxmox VE clusters and supporting infrastructure as needed.
• Operations, Security & Automation
• Proactively monitor system health, performance, availability, and security; diagnose and resolve hardware, software, virtualization, storage, and network issues.
• Implement and maintain security best practices, including system hardening, firewall configuration, security updates, and regular patch management.
• Develop and maintain automation using Bash, Python, Ansible, or similar tools to streamline repetitive administration, configuration, and deployment tasks.
• Plan, implement, and regularly test backup and disaster recovery processes to support data integrity and business continuity.
• Create and maintain documentation covering system configurations, architecture, operating procedures, and troubleshooting processes.
• Collaborate with development, network, security, and other IT teams to support infrastructure requirements, projects, and new systems and services.
• Provide advanced technical support for Linux systems and virtualized infrastructure, including system onboarding and critical incident response.

Skills

Proxmox VE

Linux

Bash scripting

Python

Networking

Security

Monitoring

Backups

HA

VMs/LXC

Education

Bachelor's degree

Tools

Ceph

ZFS

NFS

iSCSI

Veeam

Proxmox Backup Server

rsync

Ansible

Docker

Kubernetes

Terraform

Job description

Applied Optoelectronics, Inc. (AOI) is seeking a hands-on Linux & Proxmox Systems Administrator to manage and secure our Linux server and virtualized infrastructure in a fast-paced, on-site manufacturing environment in Sugar Land, TX.

You will handle Proxmox VE clusters, VMs, containers, storage, backups, monitoring, and automation. The ideal candidate has strong Linux fundamentals, Proxmox experience, and the ability to troubleshoot across virtualization, storage, networking, and OS layers.