Senior Linux Engineer (Kraków, PL, 30-302)

GFT Technologies SE; Polska; Hybrid; PLN 176,000 - 271,000; Full time

Benefits offered by this job

Hybrid work arrangement

Medical insurance

Lunch subsidy

Life insurance

Job summary

GFT Technologies SE is seeking a skilled Linux administrator to support and maintain enterprise Linux environments within an international team. You will strengthen security, automate infrastructure, and manage deployments in a hybrid work setup in Kraków.

The role emphasizes Jenkins automation, Tomcat/JBoss administration, and strong collaboration across cross-functional groups. Ideal candidates have hands-on Linux, security remediation, CI/CD pipelines, and scripting skills, plus experience in

Qualifications

• Hands-on Linux administration and system security experience.
• Experience with Jenkins and automation workflows.
• Proficient in shell scripting and CI/CD pipelines.
• Familiarity with Tomcat or Red Hat JBoss Web Server (JWS).
• Strong debugging, monitoring and troubleshooting skills.
• Good communication in international teams.

Responsibilities

• Manage and maintain Linux environments for stability and security.
• Identify, analyze and remediate security vulnerabilities.
• Develop and maintain Jenkins pipelines and automation workflows.
• Administer and troubleshoot Tomcat/JBoss Web Server environments.
• Perform system monitoring, performance tuning and RCA.
• Support deployments and release activities.
• Collaborate with development and infrastructure teams on production issues.
• Ensure compliance with security and operational requirements.
• Create and maintain technical documentation.

Skills

Linux administration

Security & vulnerability remediation

Jenkins

Automation tools

Shell scripting

CI/CD pipelines

Tomcat/JBoss Web Server

System monitoring

Networking fundamentals

International teamwork

Tools

IBM WebSphere Liberty (WLP)

IBM MQ

IBM App Connect Enterprise (ACE)

Containerization

Cloud platforms

Ansible

Job description

Type of contract: Employment contract

Salary range: 15800 - 24300 PLN gross

What will you do?

You will support and maintain Linux-based environments, ensuring their stability, security, and performance. Working closely with cross-functional teams, you will contribute to vulnerability remediation, infrastructure automation, and operational improvements. As part of an international technology environment, you will help deliver reliable infrastructure solutions, support middleware platforms, and maintain high operational standards across the organization.

Your tasks

• Manage and maintain enterprise Linux environments
• Identify, analyze and remediate security vulnerabilities
• Implement and support infrastructure automation solutions
• Develop and maintain Jenkins pipelines and automation workflows
• Administer and troubleshoot Tomcat and JBoss Web Server environments
• Perform system monitoring, performance tuning and root cause analysis
• Support application deployments and release activities
• Collaborate with development and infrastructure teams to resolve production issues
• Ensure compliance with security and operational requirements
• Create and maintain technical documentation

Your skills

• Strong hands-on experience with Linux administration
• Experience with system security, hardening and vulnerability remediation
• Hands-on experience with Jenkins and automation tools
• Experience with shell scripting
• Experience with CI/CD pipelines and deployment processes
• Knowledge of Tomcat or Red Hat JBoss Web Server (JWS)
• Experience with system monitoring and troubleshooting
• Understanding of networking and operating system fundamentals
• Strong analytical and problem-solving skills
• Good communication skills and experience working in international teams

Nice to have

• Knowledge of IBM WebSphere Liberty (WLP)
• Knowledge of IBM MQ
• Knowledge of IBM App Connect Enterprise (ACE)
• Experience in the banking or financial services sector
• Experience with containerization technologies
• Experience with cloud platforms
• Experience with Ansible or other configuration management tools

We offer

• Hybrid work in our client's office (Kraków) 8 days a month
• Working in a highly experienced and dedicated team
• Benefit package tailored to your needs (medical, sport, lunch subsidy, life insurance, etc.)
• Online training and certifications
• Access to e-learning platform
• Social events