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