Linux System Administrator job opportunity at Inetum.

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Date2026-03-11T15:51:03.619Z bot
Inetum Linux System Administrator
Experience: General
Pattern: Full-time
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loacation Lisbon, Lisbon, Portugal
loacation Lisbon, Lisbon....Portugal
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Job DescriptionEnsure the availability, performance, and security of Linux Server environments and related services for multiple clients by delivering operations, automation, and Level 2/3 support with on call duty.CONTEXTShared services team of 5 administrators supporting multiple client environments (multi-tenant).Responsible for operational availability, performance, and security of Linux infrastructure across on-prem and cloud.Rotating on-call to ensure service continuity per contractual SLAs.Main Responsibilities:System administration:Install, configure, and maintain Linux servers (e.g. Ubuntu, Debian, CentOS, RHEL).Perform regular patching, upgrades, and system hardening.Manage users, groups, permissions, and sudo/access policies.Ensure system stability, performance, and capacity planning.Shared services and platforms:Administer shared services (e.g. DNS, NTP, SMTP relays, web servers, file servers).Support application teams using the shared Linux infrastructure.Maintain and optimize virtualization and/or container platforms (VMware, KVM, Docker, Kubernetes – depending on the environment).Contribute to standardizing environments and configurations across multiple teams.Monitoring, incident management, and on-call:Configure and maintain monitoring and alerting tools (e.g. Zabbix, Prometheus, Nagios, Grafana).Investigate and resolve incidents affecting shared systems and services.Participate in a rotating on-call duty schedule (24/7 support):Respond to alerts within defined SLAs.Perform first analysis, mitigation, and escalation when needed.Communicate clearly with stakeholders during major incidents.Contribute to post-incident reviews (RCA) and continuous improvement actions.Security and compliance:Apply security best practices and hardening guidelines on Linux systems.Work with security teams to identify, prioritize, and remediate vulnerabilities.Manage firewalls, VPN access, and secure remote access (SSH, bastion/jump hosts).Ensure compliance with internal policies and external regulations where applicable.Backup, recovery, and continuity:Regularly test recovery and disaster scenarios.Help define and meet RPO/RTO targets for critical services.Automation and industrialization:Use scripting (Bash, Python, etc.) to automate recurring operational tasks.Use configuration management tools (e.g. Ansible, Puppet, Chef, SaltStack) to maintain consistent environments.Contribute to infrastructure as code and standard operating procedures.Documentation and collaboration:Create and maintain clear technical documentation, runbooks, and on-call procedures.Collaborate closely with application, network, security, and other support teams.Share knowledge within the team and help onboard new colleagues.Participate actively in team meetings, capacity reviews, and planning sessions.

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