Linux Administrator (L2/L3 Operations Engineer)

Linux Administrator (L2/L3 Operations Engineer) Optiveum is currently looking for an experienced Linux Administrator on behalf of our Client from the healthcare sector. Please note that Optiveum will be the recruitment and contracting party for this role, meaning we will sign the cooperation agreement directly with the chosen candidate. Key Details Rate: Up to 27 EUR/h Work model: Hybrid (75% remote, with attendance at the Warsaw Hub 1–2 days per week) Location: Warsaw, Poland Working Hours: 39 hours per week Recruitment language: English (Fluent) Recruitment process: 2-step online recruitment Role Overview We are seeking an experienced L2/L3 Linux Operations Engineer to support and maintain enterprise Red Hat Enterprise Linux (RHEL) environments. The ideal candidate will have hands-on experience in Linux administration, troubleshooting production issues, automating operational tasks using Red Hat Ansible Automation Platform, and managing system lifecycle and patching through Red Hat Satellite. The role requires a strong operational mindset, excellent problem-solving skills, and a commitment to maintaining high system availability and compliance. Key Responsibilities Provide L2/L3 operational support for RHEL 7/8/9 servers across Production, UAT, DR, and Development environments. Troubleshoot OS, application, performance, storage, and network-related issues while meeting SLA commitments. Perform user, filesystem, LVM, service, package (YUM/DNF), and security administration. Execute OS patching, vulnerability remediation, and lifecycle management using Red Hat Satellite (including Content Views, Lifecycle Environments, Activation Keys, etc.). Develop and maintain Ansible Playbooks, Roles, Templates, and Job Templates to automate routine operational tasks. Troubleshoot and optimize Ansible automation workflows and maintain automation code in Git. Monitor system health, investigate alerts, perform root cause analysis, and implement preventive measures. Create and maintain technical documentation, SOPs, and knowledge base articles. Collaborate with L3 engineers, application teams, and infrastructure teams during incident, change, and problem management activities. Required Skills & Qualifications Bachelor's or Master's degree in Computer Science, Information Technology, or a related field. Strong hands-on experience supporting enterprise production environments on Red Hat Enterprise Linux (RHEL 7/8/9) . Experience administering Red Hat Satellite for patching, provisioning, and lifecycle management. Hands-on experience with Red Hat Ansible Automation Platform , including Playbooks, Roles, Inventories, Templates, Workflows, and Ansible Vault. Solid knowledge of Linux administration (LVM, XFS/ext4, systemd, SELinux, firewalld, SSH, DNS, NFS). Experience with monitoring tools such as SCOM and Netmon. Experience with ITSM tools such as ServiceNow and a good understanding of ITIL processes. Strong troubleshooting, analytical skills, and an automation-first mindset. Nice to Have Familiarity with VMware/KVM virtualization and basic cloud concepts (AWS/Azure). Preferred Certifications: RHCSA / RHCE, Red Hat Certified Specialist in Ansible Automation, Red Hat Certified Specialist in Deployment and Systems Management, ITIL Foundation.