Senior Linux Administrator (f/m/x) @ Sii Polska

• At least 5 years of strong hands-on experience in Linux administration
• Very good understanding of system security, vulnerability fixing, patching, and hardening practices
• Practical experience in scripting and automation, e.g., Bash, Python, or Ansible
• Experience with Jenkins administration or support of Jenkins-based automation processes
• Knowledge of Tomcat/JWS administration, troubleshooting, and operational support
• Ability to analyze logs, diagnose incidents, and resolve technical issues independently
• Good communication skills and readiness to cooperate with technical stakeholders in an international environment
• Reliability, ownership, and a proactive approach to improving operational processes
• Knowledge of IBM integration technologies and middleware solutions
• Hands-on experience with IBM MQ administration in Linux/RHEL environments
• Availability to work in a hybrid model (2 days per week from the client’s office in Cracow)

Nice-to-have requirements

• Experience with IBM products such as WebSphere Liberty Profile (WLP) or IBM App Connect Enterprise (ACE)
• Previous experience in banking or other highly regulated enterprise environments
• Knowledge of additional automation, configuration management, or monitoring tools
• Background in SWIFT infrastructure and related integrations
• Red Hat or other Linux-related certification

We are looking for an experienced Linux Administrator to join a team responsible for maintaining secure, stable, and highly available Linux-based environments. The role focuses on Linux administration, vulnerability fixing, automation, and operational support for application and middleware platforms. ,[Administering, monitoring, and maintaining Linux environments, with a strong focus on stability, availability, and security, Identifying, troubleshooting, and resolving system and application issues in Linux-based environments, Supporting vulnerability management activities, including patching, hardening, and remediation of security findings, Creating and maintaining automation scripts to improve daily administration and operational processes, Supporting Jenkins-related automation used for deployment, maintenance, or operational workflows, Maintaining and troubleshooting application server components, especially Tomcat/JWS, Cooperating with application, DevOps, and infrastructure teams to ensure smooth delivery and operational continuity, Analyzing logs, incidents, and monitoring alerts to identify root causes and prevent recurring issues, Preparing and maintaining technical documentation, operational procedures, and security-related instructions] Requirements: Linux, Security, Bash, Python, Jenkins, Tomcat, Communication skills, IBM MQ, RHEL, IBM WebSphere, Swift Additionally: Medical care, Insurance, Sport cards, Language courses, Refferal programs, Welcome packs and other occasional gifts, Passion Sponsorship program, Regular integration events and trips, Contracts with the biggest brands, Diverse portfolio of clients, Flexible forms of employment, Internal training center, Mentoring program, Buddy Program & efficient onboarding process, Technology communities, Jubilee rewards, Profit sharing, Sport & hobby communities, Breakfast, drinks and fresh fruits in the office, Wide portfolio of technologies, Solid financial situation, Comfortable and well-equipped offices, MySii app, Invoice kiosk.