Hybrid IT Systems Manager — Linux, Network

at QITS GmbH

• Job title: IT Systems Manager — Linux, Network
• Job type: Full Time
• Experience level: Mid level, Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: Apache, DNS, Docker, Linux, MariaDB, Puppet
• Location requirements: Hybrid, Ratingen, Germany

About the role

• IT Systemmanager focusing on Linux and network infrastructure management and external service provider coordination in a hybrid working environment. Responsibilities include system administration and network error analysis.

Responsibilities

• As an IT Systems Manager — focus on Linux and networking (m/f/d), we are looking for you with a task split of Linux administration (70%) — focusing on operation, maintenance and further development of our Linux infrastructure — and network administration (30%) to manage the external service provider and implement straightforward firewall/network requirements.
• You manage services and users via the command line on Debian/Ubuntu and RHEL/Rocky Linux.
• You secure SSH access, debug SSH issues and resolve them (SSH debugging).
• You manage and operate filesystems (LVM2).
• You operate Apache, MariaDB, Tomcat, Postfix, BIND and OpenSSH; configure management with Puppet; and support developers with Docker, GitLab and Git.
• You consolidate firewall rules in the Palo Alto firewall together with network service providers and configure the rules.
• You coordinate the external network service provider.
• You perform network troubleshooting and analysis using tcpdump and Wireshark; administer switches in collaboration with our service provider; and create and maintain technical documentation.

Requirements

• You have vocational training as an IT specialist (Fachinformatiker) or a degree in computer science.
• You have solid Linux experience (Debian/Ubuntu, RHEL/Rocky) and ideally hold an LPIC or equivalent certification.
• You have practical experience in SSH management, filesystems (LVM2) and common services (Apache, MariaDB, Tomcat, Postfix, BIND, OpenSSH).
• You are familiar with Puppet or similar configuration management tools; you are proficient with Docker, GitLab and Git from a developer’s perspective.
• You have basic knowledge of security best practices and methods for hardening Linux systems.
• You are experienced in working collaboratively with developers and external service providers.
• You have networking knowledge including IP/routing, VPN, NAT, load balancing, mail, SSH, DNS and experience with network analysis.

Benefits

• Your workplace is hybrid — presence at our Ratingen site (near Düsseldorf) is required 2–3 days per week.
• Our weekly working hours are 37.5 hours.
• If IT training is important to you, you can count on our support.
• You will receive an attractive fixed salary and 30 days of vacation per year.
• Modern IT equipment.
• Coffee, water and fruit available free of charge.
• Health offerings & company events.