Test Automation Engineer (REF5477I)

Stack

Responsibilities

• ▹Ensure the quality, reliability, and correctness of complex, distributed systems across web, API, database, and mobile layers
• ▹Design and execute functional, regression, and integration test cases, analyzing system behavior end to end
• ▹Investigate defects by validating data, API responses, and application logs
• ▹Work closely with developers, product owners, and other stakeholders in an Agile environment
• ▹Contribute to delivering stable, high-quality software solutions that meet both business and technical requirements

Requirements

• ▹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 log analysis (Graylog)
• ▹Understanding of mobile application testing, including functional testing on iOS and Android (emulators/simulators and/or real devices)
• ▹Experience or strong interest in test automation using Java with Selenium, or JavaScript/TypeScript with Playwright
• ▹Ability to understand existing automation frameworks, contribute new automated tests, and maintain test suites
• ▹Familiarity with CI/CD pipelines and how automated tests fit into build and deployment processes is a plus

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

Soft skills

About the company

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 5,300 employees, serving hundreds of large customers in Germany and other European countries. DT-ITS received the Best in Educational Cooperation award from HIPA in 2019 and was acknowledged as the Most Ethical Multinational Company in 2019. The company continuously develops its four sites in Budapest, Debrecen, Pécs, and Szeged.