Senior Linux Engineer – DC Migration Programme

We are looking for a Senior Linux Engineer to join a data centre migration programme supporting critical payment processing platforms. This role sits within the core infrastructure stream and focuses on ensuring stability, performance, and successful migration of high-availability transaction systems.

The platforms support payment card acceptance, acquiring services, and issuer processing, operating in real-time environments with strict requirements around availability, security, and performance.

Responsibilities

• 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

Nice to have

• 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