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 WebLogic 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, PowerShell, 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