Senior Test Automation Engineer (Java, Selenium & Rest Assured) - Krakow - Onsite - 2/3 days per week

On behalf of our client, we are looking for a highly skilled Senior Test Automation Engineer to join an elite software engineering team. This role is tailored for a technical expert who thrives on building framework infrastructure from scratch, verifying complex back-end operations, and optimising automated delivery pipelines. This is a stable, long-term B2B collaboration focused on modern testing methodologies and continuous integration. Tech Stack Required • Core Languages: Core Java • UI Automation: Selenium WebDriver with Java • API Automation: Rest Assured with Java • Methodology: BDD Cucumber • Databases & Testing: SQL (Oracle, Postgres, MongoDB) • Testing Infrastructure: TestNG, JUnit, Maven, Ant, Git • Project Management: Jira, Rally Key Responsibilities • Framework Infrastructure: Design, implement, and scale end-to-end BDD automation frameworks using Java, Selenium, and Cucumber. • API & UI Testing Execution: Write and run seamless automated UI scripts alongside thorough back-end API automation suites using Rest Assured. • Pipeline Deployment: Fully embed your functional testing scripts into active DevOps CI/CD pipeline implementations. • Database Level Validation: Complete extensive data testing cycles by writing precise SQL scripts across multiple DB platforms. • Root Cause Failure Isolation: Track down test flakiness, inspect application system logs, and actively debug automated script failures. Requirements & Qualifications • 4+ Years of recent, continuous hands-on experience in UI Automation using Selenium with Java. • 18+ Months of recent, hands-on experience in API Automation using Rest Assured with Java. • 2+ Years of hands-on experience building/using frameworks with BDD Cucumber. • 2+ Years of extensive experience in DB Testing & writing clean SQL queries. • Java Proficiency: High comfort level and deep understanding of programming in Java. • Strict Continuity: Your hands-on automation background must be current and continuous, without recent breaks or transitions into pure management. • Strong framework ecosystem awareness via TestNG, JUnit, Git, and Maven. Nice to have / Bonus Skills • Practical automation experience with Playwright. • Foundational coding knowledge in Spring Boot or JavaScript. What the B2B Contract Offers • Transparent, long-term B2B contractual agreement with consistent billing terms. • Highly professional, flat-structured engineering team culture. • Access to cutting-edge cloud infrastructure and modern DevOps environments.