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

GFT Technologies SE

Polska

Hybrid

PLN 186,000 - 234,000

Full time

14 days+

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Benefits offered by this job

Hybrid work

Job summary

GFT Technologies SE in Poland seeks a Linux Infrastructure Engineer to support and maintain Linux-based environments, focusing on stability, security, and performance. You will work with cross-functional teams to contribute to automation, CI/CD, and middleware support, delivering reliable infrastructure solutions in an international setting with a hybrid work model from Kraków.

Ideal candidates bring hands-on Linux, security, Jenkins, and scripting expertise, with strong problem-solving and

Qualifications

Proven Linux administration experience in enterprise environments.
Strong skills in security hardening and vulnerability remediation.
Hands-on with Jenkins and automation tools.
Shell scripting and CI/CD pipeline implementation.
Experience with Tomcat or JBoss Web Server.
Ability to monitor systems and perform troubleshooting.
Good communication and collaboration in international teams.
Willingness to work hybrid from Kraków (8 days/month).

Responsibilities

Maintain enterprise Linux environments.
Identify and remediate security vulnerabilities.
Implement and support infrastructure automation.
Develop Jenkins pipelines and automation workflows.
Administer Tomcat and JBoss Web Server environments.
Monitor systems, tune performance, and perform root cause analysis.
Support application deployments and release activities.
Collaborate with development and infra teams to resolve production issues.
Ensure compliance with security and operational requirements; maintain docs.

Skills

Linux administration

Security hardening

Jenkins

Shell scripting

CI/CD pipelines

System monitoring

Networking basics

Communication in international teams

Hybrid work readiness

Tools

Tomcat

JBoss Web Server (JWS)

Red Hat JBoss Web Server

Jenkins

Ansible

IBM WebSphere Liberty (WLP)

IBM MQ

IBM App Connect Enterprise (ACE)

Job description

Type of contract: B2B contract

Salary range: 135 - 170 PLN/H

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

Requirements