Technical Support Engineer / Linux Systems Administrator (L2/L3) at TechBiz Global GmbH

TechBiz Global GmbH; Fatih; On-site; TRY 350,000 - 520,000; Full time

Job summary

TechBiz Global GmbH in İstanbul, Türkiye, is seeking a Technical Support Engineer / Linux Systems Administrator (L2/L3) for an on-site, full-time role. You will join the technical team to manage GNU/Linux systems, virtualization, and hosting environments, delivering reliable performance for clients with shared hosting platforms.

The ideal candidate has hands-on Linux expertise, experience with cPanel/WHM, web stacks (WordPress, Laravel), and security tooling.

Qualifications

• Several years of hands-on experience in the web hosting industry.
• Advanced proficiency in Linux system administration and troubleshooting.
• Cross-platform support with Windows Server (IIS, MSSQL).
• Deep knowledge of cPanel/WHM, CloudLinux, PHP configuration, and shared hosting constraints.
• Experience with web servers (Apache, Nginx, LiteSpeed) and database stacks.
• Familiarity with network protocols and security practices.
• Scripting and automation with Bash and Python; Ansible is a plus.
• Experience with WHMCS and module integrations.
• Multilingual communication is advantageous.

Responsibilities

• Administer and maintain GNU/Linux systems and virtualized environments.
• Deploy and manage web hosting control panels in shared environments.
• Troubleshoot PHP apps, WordPress, Laravel; Node.js/Python stacks a plus.
• Configure networks, firewalls, and WAFs; respond to security incidents.
• Manage mail server issues with Exim, Dovecot, SPF/DKIM/DMARC.
• Monitor services and perform performance tuning for web servers and DBs.
• Assist migrations of hosting accounts, VMs, and mail systems.

Skills

Linux administration

Web hosting support

Networking fundamentals

Scripting (Bash/Python)

English communication

Tools

cPanel/WHM

Plesk

Docker

OpenVZ

KVM

Apache/Nginx/Litespeed

MySQL/MariaDB

Dovecot/Exim/DMARC/SPF

Ansible

WHMCS

Job description

Technical Support Engineer / Linux Systems Administrator (L2/L3), TechBiz Global GmbH, İstanbul, T34, TR. This Full time on site position offers great opportunities for career growth.

Key Responsibilities

• Infrastructure Collaboration: Work within the technical team to administer and maintain GNU/Linux operating systems and virtualized/containerized environments (OpenVZ, KVM, Docker, etc).
• Web Hosting Operations: Participate in the deployment, management, and troubleshooting of industry‑standard control panels (like cPanel/WHM, Plesk) within shared hosting environments.
• Application & Web Stack Support: Troubleshoot and optimize web applications built on common web technologies, frameworks and CMS platforms (WordPress, Laravel, etc.). Assist clients and resolve complex issues related to PHP, with knowledge of Node.js and Python stacks considered a strong plus.
• Network & Security Operations: Help configure and maintain network protocols, firewalls, and WAFs (ModSecurity, Imunify360). Work with the team to identify, respond to, and mitigate security incidents (malware, phishing, DoS, etc.).
• Mail Server Administration: Troubleshoot mail flow and deliverability issues, you are already familiar with Exim, Dovecot, SPF, DKIM, DMARC, and the use of external mail relays.
• Performance & DevOps: Contribute to routine service monitoring and execute performance tuning across Apache, Nginx, LiteSpeed, and database engines (mainly MySQL/MariaDB, and rarely PostgreSQL and Redis).
• Reliability & Migrations: 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.

Required Qualifications

• Experience: Several years of hands‑on experience in the web hosting industry in both technical support and system administration.
• OS Mastery: Advanced proficiency in Linux system administration and troubleshooting.
• Familiarity with Windows Server environments (including IIS, MSSQL) for cross‑platform support cases.
• Hosting Stacks: Deep understanding of the cPanel/WHM ecosystem, CloudLinux (LVE, CageFS, Selectors), PHP configuration, and typical shared hosting constraints and workarounds. In addition to proven expertise configuring, managing, and troubleshooting HTTP web servers (Apache, Nginx, LiteSpeed, etc.).
• Web Technologies: Strong grasp of web server mechanics, relational/NoSQL databases, and the ability to debug complex web apps at the server level.
• Networking Fundamentals: Solid understanding of TCP/IP, DNS, and network protocols.
• Communication: Strong ability to manage escalated support tickets and collaborate with peers to provide custom technical solutions for clients.
• Nice‑to‑Have Automation & Scripting: Proficiency in writing Bash scripts, Python utilities, and utilizing Ansible playbooks to help the team automate routine deployments and maintenance tasks.
• Billing & Integration: Experience with WHMCS backend architecture and custom module integrations.
• Hardware & Architecture: Familiarity with high‑density enterprise server architectures and large‑scale account consolidation workflows.
• Multilingual Support: Professional fluency in English is highly advantageous for internal documentation and diverse client communication.