• 
  Administer, configure, and maintain enterprise Linux server
  environments
• 
  Support application platforms running on Linux infrastructure
• 
  Build and prepare infrastructure environments for migration
  activities
• 
  Monitor system performance, reliability, and availability
• 
  Diagnose and resolve infrastructure issues impacting application
  environments
• 
  Support environment setup, configuration, and access preparation
  for migration phases
• 
  Collaborate closely with application, middleware, and
  infrastructure teams during migration execution
• 
  Maintain operational
  documentation and technical knowledge in Confluence

Requirements

• 
  Advanced Linux system administration experience
• 
  Strong experience with Red Hat Enterprise Linux or Oracle Linux
• 
  Experience supporting application servers such as JBoss, Tomcat, Apache,
  OHS, WildFly, or Spring Boot environments
• 
  Experience with automation tools such as Rundeck or Ansible
• 
  Strong experience with Linux monitoring, performance analysis, and
  troubleshooting
• 
  Scripting skills in Bash or Python
• 
  Solid understanding of IP networking and infrastructure concepts
• 
  Experience supporting high-availability or high-transaction systems
• 
  Experience supporting infrastructure or data centre migration programmes
• 
  Strong collaboration
  skills in international engineering environments

• 
  Understanding of cryptography concepts such as PKI
  and PGP
• 
  Experience in payments, fintech, or financial
  transaction systems
• 
  Exposure to large-scale enterprise transformation
  programmes
• 
  Knowledge
  of load balancing, TLS, and secure infrastructure patterns

Benefits

• 
  Solid, competitive salary
• 
  Work in a multinational environment on international projects
• 
  Comprehensive healthcare
• 
  Long-term B2B contract with a stable project pipeline
• 
  Work model: Warsaw-based, primarily onsite with 1–2 remote days
  per month