Senior Linux Systems Engineer – Data Center Migration and Payment Processing

Hook – one bold sentence
Empower seamless data center migrations and redefine payment processing security with your Linux expertise!Location & Work Model
Warszawa-based opportunity with on-site work.
As a Senior Linux Systems Engineer, you will be working for our client, a leading financial technology provider, supporting critical application migrations and payment systems. You will play a pivotal role in ensuring high availability, security, and performance across complex Linux environments, contributing to innovative infrastructure transformation projects.

Your main responsibilities:
• Administer, configure, and maintain Linux server environments (RedHat, Oracle Linux) supporting payment and issuer processing applications.
• Automate infrastructure deployment and management using tools like Rundeck and Ansible.
• Diagnose, monitor, and enhance system performance, ensuring optimal uptime and security.
• Collaborate closely with Application & Middleware teams for BAU tasks, migration planning, and environment setup.
• Resolve technical challenges rapidly and document procedures effectively using Confluence.
• Work alongside project managers to build, test, and execute data center migration activities.
• Implement cryptography solutions (PKI, PGP) and manage IP network configurations.
• Support incident resolution, ensuring business-critical systems remain resilient and reliable.

You’re ideal for this role if you have:
• At least 5 years of experience in Linux system administration, preferably in payment or high-transaction environments.
• Strong skills in Linux (RedHat, Oracle Linux) and application servers such as JBoss, Tomcat, Apache, OHS, WildFly, Spring Boot.
• Hands-on experience with automation tools like Ansible and Rundeck.
• Knowledge of cryptography (PKI, PGP) and IP network management.
• Bash or Python scripting proficiency.
• Ability to quickly grasp complex infrastructure knowledge.
• Analytical mindset with problem-solving capabilities.
• Fluent Polish and English language skills, both written and spoken.

It is a strong plus if you have:
• Current RHCE certification.
Language Required for the role:
Fluent Polish and English, both written and spoken.
Eligibility to work on this role:
Only candidates with an existing legal right to work in the European Union will be considered for this role.
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Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.