Integration Tester

This is a remote position.

We are looking for an Integration Tester to support testing across complex telecommunications and billing systems. The role focuses on validating end-to-end integrations, analysing APIs, logs, messages, files, and data flows, and identifying the source of issues across connected enterprise applications.

Responsibilities

• Perform integration testing between enterprise systems
• Create and execute integration test scenarios
• Validate end to end system flows
• Test interfaces between applications and systems
• Verify incoming and outgoing messages
• Verify files and data streams exchanged between systems
• Analyse application and integration logs
• Validate data transferred between systems
• Identify the source of integration failures
• Perform regression testing following system changes
• Retest fixes and completed changes
• Prepare test data
• Validate test results across connected systems
• Document test execution and results
• Register and document defects
• Record results in ALM Quality Center or another tool selected by Polkomtel
• Cooperate with development and application teams during defect investigation
• Support automation of integration tests where appropriate
• Support functional and non-functional testing where required
• Potentially work within an Agile delivery model

Requirements

• Commercial integration testing experience
• Experience testing communication between multiple systems
• Experience with end to end testing
• Strong technical troubleshooting skills
• Experience analysing logs
• Experience analysing incoming and outgoing system messages
• Experience validating files and data streams
• Understanding of APIs and system interfaces
• Ability to prepare test cases and scenarios
• Experience preparing test data
• Regression and retesting experience
• Defect analysis and documentation
• Ability to independently investigate the source of system failures
• Experience working with complex enterprise systems

Nice to have

• Telecommunications experience
• Billing systems experience
• REST / SOAP API testing
• Postman or similar API testing tools
• SQL and database validation
• XML / JSON
• Kafka or messaging technologies
• ALM Quality Center
• Test automation experience
• Java
• Selenium / Playwright
• JMeter
• Agile experience

Benefits

• Fully remote working model
• Solid, competitive salary
• Work in a multinational environment on international projects
• Comprehensive healthcare
• Long-term B2B contract with a stable project pipeline