Technical Support Engineer / Linux Systems Administrator (L2/L3)

Stack

Responsibilities

• ▹Administer and maintain GNU/Linux operating systems and virtualized/containerized environments (OpenVZ, KVM, Docker)
• ▹Deploy, manage, and troubleshoot industry-standard control panels (cPanel/WHM, Plesk) within shared hosting environments
• ▹Troubleshoot and optimize web applications built on common web technologies, frameworks, and CMS platforms (WordPress, Laravel)
• ▹Assist clients and resolve complex issues related to PHP, with Node.js and Python stack knowledge as a strong plus
• ▹Configure and maintain network protocols, firewalls, and WAFs (ModSecurity, Imunify360)
• ▹Identify, respond to, and mitigate security incidents (malware, phishing, DoS)
• ▹Troubleshoot mail flow and deliverability issues (Exim, Dovecot, SPF, DKIM, DMARC, external mail relays)
• ▹Contribute to routine service monitoring and performance tuning across Apache, Nginx, LiteSpeed, and database engines (mainly MySQL/MariaDB, rarely PostgreSQL and Redis)
• ▹Support infrastructure projects, including migration of hosting accounts, VMs, and mail systems
• ▹Assist in testing and implementing disaster recovery, backups, failovers, and caching/CDN strategies

Requirements

• ▹Several years of hands-on experience in the web hosting industry in both technical support and system administration
• ▹Advanced proficiency in Linux system administration and troubleshooting
• ▹Familiarity with Windows Server environments (including IIS, MSSQL) for cross-platform support cases
• ▹Deep understanding of the cPanel/WHM ecosystem, CloudLinux (LVE, CageFS, Selectors), PHP configuration, and typical shared hosting constraints and workarounds
• ▹Proven expertise configuring, managing, and troubleshooting HTTP web servers (Apache, Nginx, LiteSpeed, etc.)
• ▹Strong grasp of web server mechanics, relational/NoSQL databases, and the ability to debug complex web apps at the server level
• ▹Solid understanding of TCP/IP, DNS, and network protocols
• ▹Strong ability to manage escalated support tickets and collaborate with peers to provide custom technical solutions for clients

Nice to have

• ▹Proficiency in writing Bash scripts, Python utilities, and utilizing Ansible playbooks to automate routine deployments and maintenance tasks
• ▹Experience with WHMCS backend architecture and custom module integrations
• ▹Familiarity with high-density enterprise server architectures and large-scale account consolidation workflows
• ▹Professional fluency in English for internal documentation and diverse client communication

About the company

TechBiz Global provides recruitment services to top clients from its portfolio; this position is for one of its clients' teams.