June 16, 2026

Senior Software Development Engineer in Test (SDET)

Senior • Remote

Warsaw, Poland

Svitla Systems Inc. is looking for a Senior Software Development Engineer in Test (SDET) for a full-time position (40 hours per week) in Europe. Our client is a reputable leader in creating cutting-edge utility software and technology, providing solutions that encompass consumer billing and finance as well as IT, GIS, advanced analytics, cybersecurity, and operations.

Requirements:

  • 7+ years in software testing with a strong emphasis on automation engineering.

  • Advanced C# skills required; experience writing test code, libraries, and utilities.

  • Proven Playwright expertise; experience with Selenium or similar tools is a plus.

  • Demonstrated ability to build and scale automation frameworks from the ground up.

  • Hands-on API testing experience using code (REST/GraphQL); familiarity with contract testing.

  • Deep experience integrating tests into CI/CD (Jenkins, GitLab CI/CD) and configuring pipelines for test execution.

  • Comfortable in Linux and Windows environments.

  • Familiar with containerization and cloud test environments (Docker, AWS/Azure/GCP).

  • Strong debugging skills: log analysis, root cause, and flaky test mitigation.

  • Excellent communication and ability to present technical trade-offs and metrics to leadership.

  • Bachelor’s degree in CS/IT or equivalent experience.

Responsibilities:

  • Framework Architecture: Design, implement, and evolve automation frameworks from scratch using C# and Playwright; ensure maintainability, modularity, and reusability.

  • Test Engineering: Develop unit, integration, API, and UI tests in code; create test harnesses and mocks; ensure tests are deterministic and fast.

  • CI/CD Integration: Embed automated tests into CI/CD pipelines (Jenkins, GitLab CI/CD); implement quality gates, parallel execution, and test reporting.

  • Automation Strategy: Drive automation roadmap to increase coverage from current ~10% to target levels; prioritize test types by risk and ROI.

  • Performance and Nonfunctional Testing: Define and automate performance, reliability, and security checks where applicable.

  • Metrics and Reporting: Define automation KPIs (coverage, flakiness, execution time, escaped defects); present metrics to engineering leadership.

  • Technical Mentorship: Mentor engineers and QA on test-driven development, test design patterns, and code review for tests.

  • Cross-Functional Collaboration: Work closely with developers, architects, and DevOps to shift-left testing and reduce manual handoffs.

We offer:

  • US and EU projects based on advanced technologies.

  • Competitive compensation based on skills and experience.

  • Regular performance appraisals to support your growth.

  • Flexibility in workspace, either remote or our welcoming office.

  • Bonuses for article writing, public talks, and other activities.

  • Generous time off, including vacation, national holidays, sick leaves, and family days.

  • Personalized learning programs tailored to your interests and skill development.

  • Free tech webinars and meetups organized by Svitla.

  • Regular corporate online activities.

  • Awesome team and a friendly, supportive community!

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Warsaw, Poland

900 - 1,100 PLN

🏢 Summary: Hybrid SDET role focused on designing and maintaining scalable test automation frameworks using Java and Selenium. The position involves integrating automated tests into CI/CD pipelines and performing API, integration, and end-to-end testing within an Agile environment. The role emphasizes strong development practices to ensure high-quality software delivery. 🗂️ Requirements: Strong programming experience in Java, Hands-on experience with Selenium WebDriver, Experience designing automation frameworks, Experience with TestNG or JUnit, Experience with CI/CD tools, Experience testing web applications, Experience testing APIs, Understanding of Agile/Scrum, Strong debugging skills 📃 Skills: Java, Selenium, WebDriver, TestNG, JUnit, Jenkins, GitLab, CICD, API, Agile 🏢 Description: We are seeking a skilled SDET (Software Development Engineer in Test) with strong experience in Java and Selenium to join our engineering team in Warsaw. This role requires a hybrid presence with two days per week onsite in the Warsaw office. The ideal candidate will have a strong development mindset and experience building scalable test automation frameworks to ensure high-quality software delivery. Key Responsibilities Design, develop, and maintain test automation frameworks using Java and Selenium Write clean, maintainable, and scalable automated test code Integrate automated tests into CI/CD pipelines Collaborate closely with developers, QA engineers, and product teams to ensure quality throughout the development lifecycle Perform API, integration, and end-to-end testing Identify, document, and track defects using issue tracking tools Participate in Agile ceremonies including sprint planning, reviews, and retrospectives Contribute to continuous improvement of testing strategies, tooling, and processes Required Skills & Experience Strong programming experience in Java Hands-on experience with Selenium WebDriver Experience designing and implementing automation frameworks Experience with testing frameworks such as TestNG or JUnit Familiarity with CI/CD tools (e.g., Jenkins, GitLab CI, or similar) Experience testing web applications and APIs Understanding of Agile/Scrum development environments Strong problem-solving and debugging skills Good communication skills in English Nice to Have Experience with REST API testing (e.g., REST Assured) Knowledge of BDD frameworks such as Cucumber Familiarity with Docker or containerized environments Experience with cloud platforms (AWS, GCP, or Azure) Work Model Hybrid: 2/3 days onsite in Warsaw , remaining days remote What We Offer Competitive salary or contract rate Flexible hybrid working model Opportunity to work with modern automation technologies Collaborative, international engineering environment