Test Engineer

At Mindbox we connect top IT talents with technology projects for leading enterprises across Europe.

You will join the Hilda 2.0 (HTC) modernization program, responsible for migrating multiple legacy .NET applications and MSSQL databases to a modular, cloud-native Azure ecosystem. The stack includes React + TypeScript frontends, .NET 9 APIs, Azure SQL, Azure Data Factory, and Power BI. Your work will be integral to building robust and reliable testing frameworks that ensure the quality of new and migrated components throughout the entire project lifecycle.

Sounds like your kind of challenge?

#LI - Hybrid: 3x/week from the office in Kraków

What you'll be doing

Own and evolve the automated testing process: frameworks, standards, best practices.
Define and implement a comprehensive test strategy across unit, API, integration, and E2E levels.
Build E2E automation in Playwright (React apps), backend integration/unit tests in xUnit (.NET), and frontend unit tests in Vitest/Jest.
Embed automated tests into Azure DevOps CI/CD pipelines (PR checks, nightly runs, pre-release gates).
Ensure test data management, maintain test reliability, and publish quality metrics.
Validate data flows across Azure SQL, ODS, and DWH; design data-driven test scenarios.
Collaborate closely with developers on acceptance criteria and mentor on testability.
Support UAT: prepare environments, verify scenarios, and document results.

Note: Detailed project information will be shared during the recruitment process.

What you get in return

Flexible cooperation model – choose the form that suits you best
(B2B, employment contract, etc.)
Hybrid work setup – 3x/week from the office in Kraków
Collaborative team culture – work alongside experienced professionals eager to share knowledge
Continuous development – access to training platforms and growth opportunities
Comprehensive benefits – including Interpolska Health Care, Multisport card, Warta Insurance, and more
High quality equipment – laptop and essential software provided

Who we're looking for

5+ years in test automation with experience in custom framework development.
Strong coding skills in C#/.NET and JavaScript/TypeScript.
Hands-on experience with Playwright (or Selenium with willingness to switch).
Unit/integration testing in xUnit/NUnit, frontend testing with Vitest/Jest.
Azure DevOps CI/CD integration.
Solid SQL skills (MSSQL/Azure SQL).
REST API testing and authentication flows (Azure AD, JWT, OAuth).
Self-driven and capable of owning the test automation roadmap.

Nice to have

Knowledge of Azure services, ADF, ETL testing, Power BI verification.
Contract testing (Pact), performance tools (k6, JMeter).
Infrastructure as Code (Terraform) familiarity and observability (App Insights).
Relevant certifications (ISTQB Advanced, Azure, Test Automation).

Joining this project you’ll become part of Mindbox – a tech-driven company where consulting, engineering, and talent meet to build meaningful digital solutions. We’ll back you up every step of the way, accelerate your development, and ensure your skills make a difference.

Ready to take the next step?

Submit your application! We look forward to reviewing your profile 😊

Know someone who might be a great fit?
Feel free to share this opportunity using the referral link: Mindbox Referrals System