Senior Test Automation Engineer (.NET / C#)

Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together!

We are looking for an experienced Senior Test Automation Engineer to join a long-term project for a global technology company.

What you will do:

• Design and develop scalable automated test frameworks using C#

• Create and maintain UI, API, and integration test suites

• Collaborate closely with developers, Product Owners, and QA teams

• Participate in test strategy definition and quality assurance processes

• Analyze defects and support root cause investigations

• Integrate automated tests with CI/CD pipelines

• Mentor junior and mid-level QA engineers

• Drive continuous improvement of testing standards and best practices

What we are looking for:

Must have:

• 5+ years of experience in software testing and test automation

• Strong knowledge of C# and .NET ecosystem

• Hands-on experience with Selenium WebDriver or equivalent test automation tools.

• Experience in API testing using RestSharp or similar tools

• Experience with SpecFlow / BDD approach

• Good understanding of SQL databases

• Practical knowledge of Git and Azure DevOps

• Experience integrating automated tests into CI/CD pipelines

• Strong understanding of Agile methodologies

• Fluent English (B2+)

Nice to have:

• Playwright with C#

• Performance testing experience

• Azure Cloud exposure

• ISTQB certification

• Docker knowledge

Perks and benefits (our offer):

• Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers.

• Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location.

• Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more.

• Global collaboration - work with a diverse, international team.

• Innovative environment - be part of a forward-thinking and growth-oriented workplace.

• Engaging community - Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work.

• Team-building events including our company tradition (annual company event in Mazury).

• A pleasant surprise to start your journey with us in the form of a welcome pack.