Senior Linux System Administrator – Virtualization & Security

About the role

Empower core stability—drive impactful Linux infrastructure solutions! Lisbon-based opportunity with hybrid work model. As a Senior Linux Infrastructure Engineer – Virtualization & Security, you will be working for our client, a leading organization in the technology sector, committed to building robust, secure, and scalable infrastructure.

Key responsibilities

• Configure and maintain Linux servers within a complex infrastructure environment
• Manage and optimize virtualized environments using Proxmox
• Configure and oversee networks, VPNs, and storage solutions for maximum resilience
• Implement and uphold infrastructure security best practices
• Develop and apply monitoring and logging systems to ensure system health
• Manage automated backups and disaster recovery plans to guarantee business continuity
• Automate infrastructure processes utilizing tools such as Ansible and Terraform
• Select and optimize server hardware to ensure performance and scalability

Required profile

• At least 6 years of experience working with Linux systems (Red Hat family, Debian, Ubuntu)
• Strong experience with virtualization technology, especially Proxmox
• In‑depth networking knowledge and understanding of infrastructure security practices
• Hands‑on experience with automation tools, including Ansible and Terraform
• Solid problem‑solving skills and a focus on operational stability
• Demonstrated ability to work independently with a high sense of ownership

Required skills

• Linux (Red Hat, Debian, Ubuntu)
• Proxmox virtualization
• Ansible automation
• Terraform automation
• VPN and networking
• Monitoring and logging tools
• Backup and disaster recovery solutions
• Server hardware selection