Senior IT Application Administrator

eService is a leader in card payment acceptance and electronic transaction settlement in Poland and the largest technology provider for settlement services in Central and Eastern Europe. The company operates for nearly 25 years, offering omnichannel payment solutions for stationary and mobile service-retail points as well as online activities. It provides POS terminals and payment gateways for e-commerce and m-commerce solutions. eService is part of Global Payments Inc. (NYSE: GPN) and PKO Bank Polski, with Global Payments headquartered in Atlanta, Georgia, employing around 27,000 people worldwide, and operating globally across North America, Europe, Asia-Pacific, and Latin America.

• Very good knowledge of Linux system administration, configuration, and maintenance.
• Experience with configuration, startup, and diagnosis of applications based on Java and frameworks Spring Boot/Spring Cloud.
• Practical knowledge of application servers and DevOps tools such as Apache Tomcat, JBoss, Git/Gitea, Jenkins, and Nexus, and automation deployment processes.
• Experience with containerization technologies like Docker/Podman and knowledge of network architecture including DNS, routing, firewalls, proxies, REST API, and HTTP/HTTPS.
• Basic understanding of PCI DSS standards and mechanisms ensuring environment compliance and security.
• Ability to work with relational databases such as PostgreSQL, Oracle, or MySQL and use monitoring and log analysis tools.
• English and Polish language skills at a minimum B2 level for effective communication and working with technical documentation.

• Ensure the continuity of IT systems supporting critical business processes.
• Implement new application versions and components and monitor production environments under CI/CD processes.
• Diagnose application problems, analyze logs, and handle requests and incidents as part of L2 support.
• Provide support for critical applications operating 24/7.
• Maintain up-to-date technical and operational documentation and participate in development projects and deployment testing.
• Collaborate closely with development teams and Change and Release Managers.
• Be ready to perform rotational on-call production support duties.