Senior Software Development Engineer in Test (SDET)

Warszawa, Poland (Remote) Posted on May 7, 2026

Job Description

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!

About Svitla Systems

Svitla is a global digital solutions company with over 20 years of industry experience. Since 2003, we have engineered more than 5,000 transformative solutions for our clients around the globe, bolstering their growth and competitive edge. Our mission is to advise and implement modern, sustainable solutions for our clients, using the power of digital, cloud, data, and intelligent technologies, to help them create a thriving future for their businesses. Having a world-class team of 1,000+ technology consultants, strategists, and delivery experts, Svitla provides advisory, development, analytical, and support services to enable successful business transformations. We serve as a reliable partner to clients ranging from innovative startups to Fortune 500 enterprises, featuring notable brands such as Logitech, Ingenico, Amplience, and Global Citizen. Our extensive technological expertise spans across 20+ industries, including E-commerce & Retail, Financial Services, Healthcare & Life Sciences, Hospitality & Travel, Logistics & Transportation, among others. Svitla’s globally distributed teams operate across 10 delivery centers in the US, Europe, LATAM, India and Australia. We are experts in a number of technological domains, including cloud migration and modernization, data analytics, web and mobile development, IoT, AI, and machine learning, and provide clients with DevOps and managed support services. Svitla is a WBENC-certified business and one of the largest and fastest-growing women-owned IT companies in the US. Our unparalleled value to our clients and high-quality services are verified by multiple international awards and certifications: ISO 9001, SOC 2, AWS Advanced Partner, Inc. 5000, Global Outsourcing 100. Our focus is to build a business that is not only profitable but also contributes to the well-being of our partners, employees, their families, global and local communities, making a lasting impact on our collective future.

Industry: IT Services and IT Consulting