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Wiesbaden | Expertini

Urgent! System Administrator (m/f/d) Application Operations - JBoss, Tomcat & Linux Job | GULP – experts united

System Administrator (m/f/d) Application Operations JBoss, Tomcat & Linux



Job description

On behalf of our client, a leading and crisis-proof service provider in the insurance sector based in Wiesbaden, we are looking for a:n dedicated:n System Administrator (m/f/d) for Application Operations to start as soon as possible.

Here's what our clients offer

What our client offers:

  • A permanent contract with a crisis-proof employer.
  • An attractive, collectively agreed salary with extensive social benefits (e.g. company pension scheme).
  • Flexible working time models and the option of mobile working.
  • A modern working environment and targeted support for your professional development.
  • A responsible position at the heart of the IT infrastructure.

  • Your tasks

    What you can expect from our customer
    You will dive deep into the system and application level to optimize performance and ensure smooth operation (deployment, monitoring, troubleshooting).



    Your core tasks

  • Application operation (focus): You will be responsible for the installation, configuration and administration of the Java application servers (Tomcat, JBoss and SpringBoot).
  • Linux system administration: You will administer the underlying Linux systems (RHEL 7-9) and take care of performance optimization and hardening.
  • Deployment & Release: You control the deployment of new application versions and are responsible for release management in close coordination with the development teams.
  • Troubleshooting & Incident Management: You ensure operational readiness through in-depth error analysis and concepts for troubleshooting.
  • Security & Maintenance: You manage the patch management (execution of maintenance and update tasks) for JVM, Tomcat and JBoss and manage the SSL/TLS certificates (keystores, truststores).
  • Concept development: You will develop concepts for the further development and protection of the application and system landscape.
  • General data:

  • Start: 01.12.2025 or later (depending on availability)
  • Workload: Full-time
  • Location: Wiesbaden, remote work possible
  • Communication: German, documentation in English

  • Your profile

  • Completed IT training (at least 5 years of professional experience) or IT studies (at least 3 years of professional experience)
  • In-depth know-how in the administration of Java application servers (JBoss, Tomcat, SpringBoot)
  • Know-how in network security (firewall, VPN)
  • Very good knowledge of Linux system administration (RHEL), including performance optimization
  • Experience in deployment and troubleshooting of Java applications
  • High willingness to learn and initiative
  • Good to very good knowledge of German
  • Good knowledge of English
  • Nice-to-Have: Knowledge of load balancers (e.g. Kemp)
  • Nice-to-Have: Experience with web servers (Apache) or WAF (ModSecurity)
  • Nice-to-Have: Know-how in the area of network services (DNS/Bind, DHCP/Infoblox)
  • Nice-to-Have: Experience with web proxy or mail gateways
  • Nice-to-Have: Scripting knowledge

  • Required Skill Profession

    Computer Occupations



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