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Deutsche Telekom IT Solutions • Budapest, Central Hungary, Hungary
Salary: 2019. The compa
Role & seniority: QA Engineer (role described; seniority not explicitly specified; likely mid–senior level)
Testing: functional, regression, integration testing for web, API, database, and mobile
API: REST/JSON testing; Postman or similar tools
Databases/SQL: complex queries, data validation, root-cause analysis; relational DB concepts
Logs/monitoring: application/API/database logs; Graylog
Test management/defect tracking: Jira, Xray, TestRail
Mobile: iOS/Android functional testing (emulators/simulators or real devices)
Automation: Java + Selenium or JavaScript/TypeScript + Playwright
CI/CD: basic familiarity with how tests fit into pipelines
Design and execute functional, regression, and integration test cases across web, API, database, and mobile layers; validate data, API responses, and logs
Analyze end-to-end system behavior; investigate defects and perform root-cause analysis using logs and test data
Collaborate with developers, product owners, and stakeholders in Agile/ Scrum to deliver stable, high-quality software
Strong experience in functional, regression, and integration testing of complex, distributed systems
API testing proficiency (REST/JSON) with payload validation and edge cases
Advanced SQL skills and database concepts (data modeling, normalization)
Ability to analyze logs for root-cause identification
Experience with test manageme
Company Description
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.
Job Description
Job description
You will be responsible for ensuring the quality, reliability, and correctness of complex applications across web, API, database, and mobile layers. You will design and execute functional, regression, and integration test cases, analyze system behavior end to end, and investigate defects by validating data, API responses, and application logs. Working closely with developers, product owners, and other stakeholders in an Agile environment, you will contribute to delivering stable, high-quality software solutions that meet both business and technical requirements.
Technical Skills
Strong experience in functional, regression, and integration testing of complex, distributed systems across web, API, database, and mobile platforms. Solid understanding of end-to-end system architectures, including how frontend, backend services, APIs, and databases interact. Proficient in API testing (REST/JSON), including validation of request/response payloads, error handling, and edge cases (e.g. using Postman, REST clients, or similar tools). Strong SQL skills – ability to write, optimize, and debug complex queries for test data preparation, validation, and root-cause analysis. Good understanding of database concepts (relational databases, data modeling, normalization). Experience analyzing and troubleshooting issues using application logs, API logs, and system logs to identify root causes. Hands-on experience with test management and defect tracking tools (e.g. Jira, Xray, TestRail). Experience with Monitoring tools and logs analysis (Graylog). Understanding of mobile application testing, including functional testing on iOS and Android (emulators/simulators and/or real devices).
Qualifications
Soft Skills & Competencies
Strong analytical and problem-solving skills, especially when working with complex systems and non-obvious defects. High attention to detail and accuracy in test execution, data validation, and defect reporting. Ability to analyze failures, distinguish between test issues and product defects, and clearly articulate findings. English language knowledge and communication skills to collaborate effectively with developers, product owners, architects, and other QA members. Ability to understand business and technical requirements and translate them into clear, effective test scenarios and test cases. Proactive mindset in identifying risks, gaps, and improvement opportunities early in the development lifecycle. Comfortable working in Agile/Scrum environments with frequent releases and changing priorities.
Nice-to-Have
Experience testing microservices-based architectures. Familiarity with cloud environments and cloud-native applications. Experience with performance, reliability, or security testing at a basic level. German language knowledge
Additional Information
Please be informed that our remote working possibility is only available within Hungary due to European taxation regulation.