Senior Test Automation Engineer - OSR - REF5430K

As Hungary’s most attractive employer in 2025 (according to Randstad’s representative survey), Deutsche Telekom IT Solutions is a subsidiary of the Deutsche Telekom Group. The company provides a wide portfolio of IT and telecommunications services with more than 5300 employees. We have hundreds of large customers, corporations in Germany and in other European countries. DT-ITS recieved the Best in Educational Cooperation award from HIPA in 2019, acknowledged as the the Most Ethical Multinational Company in 2019. The company continuously develops its four sites in Budapest, Debrecen, Pécs and Szeged and is looking for skilled IT professionals to join its team. The Digital Hub OS&R develops and delivers IT solutions for the planning, building, and operation of broadband network infrastructure (including BNG). It covers the full network lifecycle—from integrated planning and rollout to ongoing operations—while driving automation across these processes. Its goal is to provide end-to-end solutions from a single source, enabling faster, more efficient, and customer-focused software delivery through feature-centric agile development. As a ROSÉ Software QA Engineer , you will play an integral role in ensuring the quality and reliability of OSNR processes by: Test Design & Execution: Developing comprehensive and well-structured test cases based on detailed business and technical requirements. Preparing and executing sets of regression tests to evaluate system stability. Applying REST API testing methodologies and validating endpoints using tools like Calypso and Hoppscotch. Testing Activities: Performing a diverse range of testing, including: Manual Testing : Identifying edge-case scenarios, user experience, and error handling. Automated Testing : Using industry-standard tools to enhance efficiency. Integration Testing : Validating proper collaboration between system modules. Regression Testing : Ensuring new changes don't impact existing functionalities. Smoke Testing : Rap