Senior Linux Administrator (f/m/x)

Expected, Linux, Apache Tomcat, Jenkins, Vulnerability, Bash, Ansible, Python

Operating system, Linux

About the project, 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.

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

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

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, Send your CV, Talk to us about your expectations, Learn more about our projects and choose the best, Start your adventure with Sii!

Sii Sp. z o.o., Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment., , Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.

This is how we work,