Linux DevOps (m/f/d)
Contract
Luxembourg, Luxembourg
29.04.2026
We are seeking a Unix/Linux DevOps with Java application support expertise to maintain, optimise, and secure the underlying infrastructure for our hosted Atlassian Jira/Confluence environments. This role focuses on server administration, performance tuning, and troubleshooting in a Linux (RHEL)-based ecosystem, ensuring high availability, security, and compliance for enterprise-scale deployments.
You will manage the Unix/Linux infrastructure, support Java-based applications (Jira/Confluence), and collaborate with Atlassian administrators to resolve system-level issues. Your expertise in Linux, Java, and web application servers will be critical to maintaining stable, performant, and secure environments.
Key Responsibilities:
You will manage the Unix/Linux infrastructure, support Java-based applications (Jira/Confluence), and collaborate with Atlassian administrators to resolve system-level issues. Your expertise in Linux, Java, and web application servers will be critical to maintaining stable, performant, and secure environments.
Key Responsibilities:
- Unix/Linux System Administration
- Administer and optimise RHEL-based servers hosting Jira, Confluence, and related Atlassian tools.
- Manage user permissions, disk space, logging, and system monitoring to ensure operational stability.
- Automate routine tasks (Bash, Python, Perl) for deployments, backups, and log analysis.
- Troubleshoot OS-level issues, including performance bottlenecks, resource contention, and connectivity.
- Java Application & Web Server Support
- Support Java-based applications (Jira/Confluence) running on Tomcat, including JVM tuning, memory optimisation, and garbage collection.
- Configure and maintain Apache HTTPD/Tomcat, including reverse proxy setups, SSL/TLS certificates, and load balancing.
- Monitor application logs (Catalina, access/error logs) to diagnose and resolve issues.
- Collaborate with Atlassian administrators to apply patches, upgrades, and security fixes (CVEs).
- Database & Integration Management
- Troubleshoot JDBC connections and optimise database queries impacting application performance.
- Support integrations with LDAP/SSO (Crowd, EULogin), CI/CD tools (Bamboo, Jenkins), and monitoring systems.
- Security & Compliance
- Enforce security best practices, including hardening Linux servers, managing firewalls, and applying patches.
- Ensure compliance with enterprise security policies, including access controls, encryption, and audit logging.
- Collaborate with security teams to mitigate vulnerabilities and respond to incidents.
- Performance & Scalability
- Optimise system performance through Linux tuning, resource allocation, and Java/JVM adjustments.
- Assess and recommend scalability improvements (e.g., clustering, high availability).
- Monitor system metrics (CPU, memory, I/O) and proactively address bottlenecks.
- Documentation & Collaboration
- Document system configurations, troubleshooting steps, and operational procedures.
- Provide technical guidance to Atlassian administrators and support teams on infrastructurerelated issues.
- Participate in change management (e.g., upgrades, migrations) to minimise downtime.
- Technical Skills (1-to-5 scale)
- Linux (RHEL) Administration: 5
- Java/JVM Tuning: 5
- Apache HTTPD: 4
- Tomcat: 4
- PostgreSQL: 4
- Bash Scripting: 4
- Python/Perl: 3
- SSL/TLS & HTTP/HTTPS: 3
- JDBC & Database Optimization: 3
- LDAP/SSO: 3
- CI/CD (Bamboo, Jenkins): 3
- Monitoring & Logging: 3
- Security Hardening: 3
- Atlassian Tools (Jira/Confluence): 2
- Soft Skills
- Analytical and problem-solving mindset for system-level issues.
- Strong communication skills to collaborate with cross-functional teams.
- Proactive and detail-oriented, with a focus on system reliability and security.
- Ability to document processes and share knowledge effectively.
- 5+ years of Unix/Linux (RHEL) system administration in enterprise environments.
- Strong experience with Java applications, including JVM tuning, Tomcat administration, and troubleshooting.
- Hands-on knowledge of web servers (Apache/Tomcat), databases (PostgreSQL), and scripting (Bash, Python).
- Familiarity with Atlassian tools (Jira/Confluence) from an infrastructure support perspective.
- Experience with security best practices, including firewalls, encryption, and compliance audits.
- Knowledge of CI/CD pipelines (Bamboo, Jenkins) and integration with monitoring tools.
- Fluency in English (written and spoken) is required; proficiency in any other European language is a plus.
- Remote (the first and only week must be completed onsite from Luxembourg)
- Security Clearance - Secret Level