Middleware Engineer – DC Migration Programme

We are looking for a Middleware Engineer to join a data centre migration programme supporting critical payment processing systems. This role sits within the core engineering stream responsible for ensuring stability, integration, and successful migration of high-volume transactional platforms. The systems support payment card acceptance, acquiring services, and issuer processing, operating in real-time environments with strict requirements around availability, performance, and reliability.

Responsibilities

Support middleware environments used by payment processing platforms Build, configure, and prepare middleware components for migration Collaborate with application and middleware teams on BAU and migration activities Support environment setup, configuration, and access preparation Diagnose and resolve technical issues impacting middleware platforms Monitor environments to ensure performance, reliability, and stability Support testing and migration phases within the data centre programme Maintain operational documentation in Confluence Requirements Strong experience with Oracle middleware and integration environments Hands-on experience with Web.

Logic Server (11g or 12c) Experience with Oracle Service Bus Experience with Oracle Forms and Oracle Reports Experience with Oracle REST Data Services (ORDS) Experience with Oracle Data Integrator Experience with Oracle Internet Directory Strong PL/SQL knowledge Scripting skills in Perl, Power. Shell, Shell, Bash, or Python Experience with automation tools such as Rundeck or Ansible Experience with enterprise scheduling tools such as BMC Control-M Experience supporting application or data centre migration programmes Understanding of performance, monitoring, resilience, and availability in high-transaction environments Understanding of infrastructure concepts including networking, load balancing, and TLS Ability to collaborate effectively with international engineering teams Nice to have Experience in payments, acquiring, or financial transaction systems Exposure to large-scale enterprise transformation programmes Experience working in regulated or high-availability environments Familiarity with release management and change governance processes 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