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Sii Sp. z o.o.

C# Test Automation Engineer (f/m/x)

Sii Sp. z o.o. Show all offers
B2B
Hybrid
Mid
Senior
Gdańsk
Łódź
Warszawa
Expires Oct 3, 2026
15 days ago

In short

C# Test Automation Engineer with 4+ years of .

NET experience. Responsibilities include designing & executing performance tests, defect analysis, framework maintenance, and agile collaboration. Offers hybrid work, private healthcare, profit sharing, and professional growth opportunities.

Keywords

C# .NET Test Automation API Testing Performance Testing SQL GIT BDD TDD Scrum

AI-written summary based on the listing content.

Technologies we use

About the project

Your responsibilities

  • Designing and implementing automated performance test scripts
  • Executing non-functional tests and analyzing test results
  • Identifying, reporting, verifying, and debugging defects
  • Reviewing requirements and technical designs from a testing perspective
  • Maintaining, improving, and extending test automation frameworks
  • Managing and preparing test data with an understanding of data dependencies
  • Recommending actions based on test outcomes and quality metrics
  • Collaborating with the agile Scrum team to ensure delivery quality
  • Supporting continuous integration processes for automated tests
  • Participating in risk mitigation, impediment resolution, and test-related communication

Our requirements

  • Minimum 4 years of experience in test automation, specifically with .NET stacks
  • Full-stack test automation experience (front-end - GUI, mobile), middleware (API/web services) and back-end (databases)
  • Experience executing test automation across different environments and different test levels
  • Methodology and industry best-practice test automation knowledge: TDD, BDD, Page Object Model, etc.
  • ISTQB foundation-level knowledge (certified or planning for certification within 3 months of joining)
  • GIT version control experience
  • Fluent in written and spoken Polish and English (work in an international environment)

What we offer

  • Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
  • Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
  • We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
  • Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
  • Comfortable workplace – class A offices or remote work
  • Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
  • PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
  • Investment in your growth – meetups, webinars, training platform and technology blog – you choose
  • Fantastic atmosphere created by all Sii Power People
Published 2026-09-03
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