L2/L3 Linux Technical Support Engineer – Web Hosting

TechBiz Global GmbH; Polska; Hybrid; PLN 120,000 - 180,000; Full time

Job summary

TechBiz Global GmbH is seeking a Technical Support Engineer / Linux Systems Administrator to join one of our clients' teams. This role offers an exciting opportunity to grow in an innovative environment across hosting, development operations, and security disciplines.

The ideal candidate will have extensive Linux administration experience, deep knowledge of cPanel/WHM, Plesk, and web hosting stacks, plus solid troubleshooting and client communication skills.

Qualifications

• Extensive hands-on Linux system administration experience.
• Proficient in hosting control panels (cPanel/WHM, Plesk).
• Strong knowledge of web tech and databases.
• Experience with hosting environments and LVE/CageFS.
• Excellent troubleshooting and ticket handling.
• Cross-platform support with Windows Server is a plus.

Responsibilities

• Administer and maintain GNU/Linux systems and virtualization.
• Operate and troubleshoot hosting control panels.
• Debug web apps and PHP stack; Node.js/Python a plus.
• Configure networks, firewalls, and WAFs; respond to security incidents.
• Manage mail servers (Exim, Dovecot, SPF/DKIM/DMARC).
• Monitor and tune Apache/Nginx/LiteSpeed and MySQL/MariaDB.
• Assist migrations, backups, DR testing and caching/CDN.

Skills

Linux admin

Windows Server

Hosting stacks

Web server tech

Networking basics

Client communication

Tools

Docker

KVM

cPanel/WHM

Plesk

Ansible

Job description

At TechBiz Global, we are providing recruitment service to our TOP clients from our portfolio.

We are currently looking for a dedicated Technical Support Engineer / Linux Systems Administrator to join one of our clients' teams. If you're looking for an exciting opportunity to grow in an innovative environment, this could be the perfect fit for you.

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.