Senior Linux System Administrator

Responsibilities:

• Design, deploy, configure, and maintain highly available, scalable, and secure Linux server environments (primarily Red Hat Enterprise Linux/CentOS or Ubuntu/Debian).
• Perform regular system monitoring, performance tuning, hardware upgrades, and resource optimisation. Maintain system health and troubleshoot complex issues across the stack.
• Develop and maintain automation scripts and infrastructure-as-code (IaC) using tools like Ansible, Puppet, Chef, or Terraform to streamline deployment and operations.
• Implement and enforce security best practices, perform vulnerability patching, manage access controls (LDAP/Kerberos), and ensure compliance with internal and external regulations.
• Configure and manage network services (DNS, DHCP, HTTP/S, SMTP, SSH) and work with network engineers on firewall rules, load balancers, and routing.
• Manage and maintain storage solutions (e.g., NFS, SAN, LVM) and implement robust backup and disaster recovery procedures.
• Manage and optimise system monitoring tools (Prometheus, Nagios, Zabbix) and centralised logging systems (ELK stack/Splunk).
• Mentor junior administrators and create and maintain comprehensive documentation for all operational procedures, infrastructure components, and troubleshooting guides.
• Participate in an on-call rotation to provide 24/7 support for critical production systems.

Requirements:

• Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent practical experience.
• 5+ years of professional experience as a Linux System Administrator, DevOps Engineer, or similar role.
• Expert-level knowledge of the Linux operating system, kernel, and command-line tools.
• Proficient in at least one major scripting language (Bash, Python, or Perl).
• Strong practical experience with configuration management tools (Ansible preferred).
• Experience managing virtualised environments (VMware, KVM, or Hyper-V) and/or public cloud platforms (AWS, Azure, or GCP).
• Solid understanding and experience with container technologies (Docker and Kubernetes).
• Experience administering web servers (Apache, Nginx) and application servers.
• Relevant certifications (e.g., RHCSA, RHCE, LPI, AWS/Azure/GCP certifications) are a plus
  
• Experience with CI/CD pipelines (e.g., Jenkins, GitLab CI) is preferred
• Database administration experience (MySQL, PostgreSQL, MongoDB) is a plus
• Experience in a high-traffic, 24/7 production environment is a plus
• Exceptional troubleshooting and analytical skills.
  
• Strong verbal and written communication skills.
• Ability to work independently and as part of a team.
• A proactive approach to system maintenance and security.
• Strong commitment to continuous learning and staying current with new technologies.