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Senior Test Automation Engineer with Java (f/m/x) Miejsce pracy: Kraków Technologies we use Expected Java Selenium or REST Assured Apache Kafka JUnit Optional Cucumber Testcontainers Docker Jenkins About the project Join a Scrum team developing the next generation of e-commerce backend services. As a Senior Test Automation Engineer, you will play a key role in ensuring the quality of a modern, distributed platform based on Event-Driven Architecture and Apache Kafka. We are looking for a detail-oriented professional with a creative mindset and strong experience in comprehensive test planning and automation. You will collaborate closely with developers to ensure API and data layers are thoroughly verified before production release, while actively contributing to the QA community and supporting the automation skill network. Your responsibilities Collaboration with development squads in defining and refining quality criteria Preparation of structured test documentation and scenario coverage Creation and continuous enhancement of automated regression suites Transformation of manual verification processes into automated solutions Implementation of integration and end-to-end validation for backend services Verification of event flows and state transitions within event-sourced systems Execution of exploratory verification activities where automation coverage is limited Critical analysis of requirements and identification of potential quality risks Development of test doubles and simulation mechanisms for asynchronous communication Contribution to the QA Community of Practice initiatives and promotion of best practices Our requirements Proven experience in comprehensive test strategy development Strong background in automation framework architecture and optimization Solid understanding of Event-Driven Architecture and event sourcing patterns Practical knowledge of API validation and backend data verification Experience in quality assurance for distributed and microservices-based systems Familiarity with message-driven platforms, including Apache Kafka Knowledge of non-functional testing approaches (performance, scalability, resilience) Understanding of data integrity, idempotency, and fault tolerance principles Active involvement in peer review processes and engineering knowledge exchange What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People Recruitment stages Send your CV Talk to us about your expectations Learn more about our projects and choose the best Start your adventure with Sii! Sii Sp. z o.o. Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment. Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.