Role Summary

As a Middleware Engineer, you will support the migration of critical payment processing applications from one data center to another. You will be responsible for middleware platforms that sit between the application and infrastructure layers, ensuring applications continue to operate reliably throughout planning, testing, migration, and post-migration activities.

The role combines middleware administration, automation, troubleshooting, documentation, and close collaboration with project managers, infrastructure teams, and application owners.

Main Responsibilities

Application Migration

Support migration of middleware components to new data center environments.
Build, configure, test, and validate middleware services.
Coordinate migration activities with project managers and technical teams.
Resolve technical issues and remove blockers during migration.

Middleware Administration

Manage and support technologies including:

Oracle WebLogic
Oracle Service Bus
Oracle Forms & Reports
Oracle REST Data Services (ORDS)
Oracle Internet Directory
Oracle APEX
Oracle Data Integrator (ODI)

Operations

Perform BAU (Business As Usual) support alongside migration work.
Monitor application performance, availability, and reliability.
Troubleshoot middleware, integration, and deployment issues.
Ensure production stability.

Automation & Scripting

Use scripting and automation tools such as:

Shell/Bash
PowerShell
Perl
Python
Rundeck
Ansible

Documentation

Produce and maintain technical documentation in Confluence.
Document configurations, procedures, migration steps, and operational knowledge.

Required Technical Skills

Middleware

Oracle WebLogic 11g/12c
Oracle Service Bus
Oracle Forms
Oracle Reports
Oracle REST Data Services (ORDS)
Oracle Internet Directory
Oracle APEX
Oracle Data Integrator (ODI)

Database

PL/SQL
Oracle databases

Scheduling & Automation

BMC Control-M
Rundeck
Ansible

Scripting

Bash/Shell
PowerShell
Python
Perl

Infrastructure Knowledge

Networking
Load balancing
TLS/SSL
High availability
Performance monitoring
Resilience and disaster recovery concepts

Soft Skills

The employer is looking for someone who can:

Communicate effectively in Polish and English.
Work with international teams and SMEs.
Coordinate technical activities across multiple stakeholders.
Take ownership of tasks and deliver on commitments.
Share knowledge and collaborate effectively.
Understand the challenges of migrating business-critical applications.

Ideal Candidate Profile

A strong candidate would have:

Experience with data center or cloud migration projects.
Middleware administration experience in Oracle technologies.
Knowledge of enterprise application architecture (three-tier architecture).
Experience supporting payment, banking, or other high-availability enterprise systems.
Strong troubleshooting and problem-solving skills.
Familiarity with automation and DevOps practices.

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