Constantinos C.

Are you looking for an experienced Linux administrator who can keep your servers secure, reliable and running at peak performance? I'm a Senior Linux Infrastructure Consultant with over 15 years of experience managing production Linux environments for web hosting companies, SaaS businesses, digital agencies and SMEs. I specialise in long-term infrastructure management, troubleshooting and performance optimisation rather than one-off fixes. Whether you need ongoing server administration or help solving a critical production issue, I can provide practical, reliable support. Core Expertise Linux Administration Ubuntu Debian RHEL AlmaLinux CloudLinux Hosting & Web Infrastructure cPanel/WHM DirectAdmin Plesk RunCloud ServerPilot Nginx Apache LiteSpeed Cloud Platforms Google Cloud Platform Hetzner DigitalOcean OVHcloud Containers & Automation Docker Ansible Databases MySQL MariaDB Monitoring Zabbix Grafana Nagios Virtualization KVM OpenVZ Services I Offer ✔ Linux server administration ✔ Production troubleshooting ✔ Server hardening and security ✔ Performance optimisation ✔ Docker deployment and maintenance ✔ Nginx, Apache and LiteSpeed administration ✔ MySQL & MariaDB optimisation ✔ cPanel / DirectAdmin / Plesk administration ✔ Cloud server deployment ✔ Server migrations ✔ Backup and disaster recovery ✔ Monitoring implementation and maintenance ✔ SSL certificate management ✔ Infrastructure audits Why Clients Work With Me 15+ years of real-world Linux administration experience Strong troubleshooting and root cause analysis skills Experience managing production web hosting environments Comfortable working independently with minimal supervision Clear communication and regular progress updates Focus on long-term reliability rather than temporary fixes I'm available for: Long-term Linux administration Monthly infrastructure maintenance Part-time infrastructure management Emergency troubleshooting Fixed-price projects Ongoing support contracts If you're looking for an experienced Linux engineer who can become a trusted extension of your team, I'd be happy to discuss your project.