Job Description

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