
Senior Test Automation Engineer with Java and Kafka (f/m/x)
Sii Poland • Toruń, Kuyavian-Pomeranian Voivodeship, Poland
Role & seniority: Senior Test Automation Engineer / QA Engineer in a Scrum team (5+ years in test automation)
Stack/tools: Java; Kafka-based distributed systems; Event Sourcing; Cucumber, Selenium, JUnit; API testing with Postman, RestAssured, Karate; CI/CD tooling (Git, Jenkins); Jira, Confluence; BDD/Gherkin; knowledge of CQRS and contract testing
Top 3 responsibilities
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Design, implement, and maintain automated tests across integration, functional, load, and performance levels; automate regression and reduce manual testing backlog
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Validate event-driven workflows, message flows, state transitions, data consistency, idempotency, and fault tolerance across microservices; apply mocking/simulation for EDA scenarios
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Support Agile teams, review automation code, and contribute to the QA Community of Practice with principles and improvements
Must-have skills
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5+ years in test automation; experience in international/multicultural environments preferred
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Strong testing of Kafka-based applications and distributed systems
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Proficient in Java with Cucumber, Selenium, JUnit; API testing (REST, gRPC, GraphQL) with Postman/RestAssured/Karate
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Experience with CI/CD, Git, Jenkins, Jira, Confluence; Understanding of Event Sourcing, CQRS, contract testing
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Performance/load testing; BDD/Gherkin; fluent English (written and spoken)
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Fluent Polish; residency in Poland
Nice-to-haves
- Experience in DevOps practices in Agile settings; prior contribution t
Full Description
Join our Scrum team developing next-generation e-commerce backend services. In this role, you will design and implement robust test automation frameworks for our Event-Driven Architecture (EDA) platform based on Apache Kafka and Event Sourcing. Your work will be critical to ensuring the scalability, reliability, and performance of distributed systems, while collaborating closely with developers and sharing knowledge within the QA community.
Sii ensures that all employment-related decisions are made solely on the basis of qualifications, competencies, and performance. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promote a diverse and inclusive work environment.
Your tasks
Supporting development teams in testing activities within Agile environments Preparing and executing test plans, test scenarios, and exploratory testing where automation is not yet applied Building and maintaining automated tests across multiple levels Eliminating the backlog of manual regression tests through automation coverage Implementing integration, functional, load, and performance tests Validating message flows, event-driven workflows, and state transitions in event-sourcing environments Ensuring data consistency, idempotency, and fault tolerance across microservices Applying mocking and simulation techniques for event-driven test scenarios Reviewing automation test code to enhance quality and share knowledge Contributing to the QA Community of Practice by sharing principles, practices, and improvements
Requirements
Having at least 5 years of proven experience in test automation, preferably in international and multicultural environments Working with Agile methodologies (Scrum, XP) and DevOps practices Testing Kafka-based applications with strong expertise in distributed systems Programming in Java with frameworks and tools such as Cucumber, Selenium, and JUnit Performing API testing (REST, gRPC, GraphQL) using Postman, RestAssured, or Karate Operating CI/CD and collaboration tools such as Git, Jenkins, Jira, and Confluence Understanding Event Sourcing, CQRS patterns, and contract testing frameworks in depth Conducting performance and load testing to ensure scalability and reliability Practicing BDD and Gherkin-driven methodologies in Agile teams Communicating fluently in English, both written and spoken, with technical and non-technical stakeholders Fluent Polish required Residing in Poland required
Job no. 260112-G961U
Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.
Benefits For You
Great Place to Work
Solid financial situation
Contracts with the biggest brands
Centre of internal trainings
Many experts you can learn from
Open and accessible management team
Profit sharing
Passion Sponsorship program
Regular integration events and trips
Comfortable and well-equipped offices
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