Senior Linux Administrator (f/m/x)

Our requirements

• 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
• Availability to work in a hybrid model (2 days per week from the client’s office in Cracow)

Optional

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

Your responsibilities

• 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

About the project

What we offer

• Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
• Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
• We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
• Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
• Comfortable workplace – class A offices or remote work
• Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
• PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
• Investment in your growth – meetups, webinars, training platform and technology blog – you choose
• Fantastic atmosphere created by all Sii Power People

Recruitment stages

• 1.
  Send your CV
• 2.
  Talk to us about your expectations
• 3.
  Learn more about our projects and choose the best
• 4.
  Start your adventure with Sii!

Sii Sp. z o.o.