July 8, 2026
Mid-Level QA Tester – Database & API Validation
Mid • On-site
14,280 - 17,220 PLN
Warsaw, Poland
Unleash quality and precision — elevate software testing to the next level!
Warszawa-based opportunity with on-site work model
As a Test Engineer, you will be working for our client, a leader in delivering mission-critical business applications. You will play a vital role in ensuring the robustness of key systems through hands-on testing, data validation, and backend process analysis, contributing directly to product excellence and user satisfaction. This role offers a unique chance to grow your expertise in a dynamic and innovation-driven environment.
Your main responsibilities:
- Plan, design, and execute manual tests (functional, integration, regression) to ensure system integrity
- Perform data validation, including checking data flows, transformations, and backend processing accuracy
- Write and execute complex SQL queries to validate data, investigate issues, and support testing activities
- Test APIs (REST, SOAP), analyze application logs, and database data to identify defects and root causes
- Create and maintain detailed test documentation such as test cases, scenarios, and reports
- Collaborate closely with developers, analysts, and Product Owners to clarify requirements and resolve issues efficiently
- Report and track defects throughout their lifecycle using Jira or similar tools
- Contribute to continuous improvement initiatives for testing processes and overall product quality
- Participate actively in Scrum ceremonies like PI Planning, Sprint Planning, and Daily Stand-ups
You're ideal for this role if you have:
- 3+ years of experience as a Manual Tester / QA Engineer
- Strong SQL knowledge, capable of writing complex queries (JOINs, subqueries, GROUP BY)
- Experience testing backend systems or data-driven applications
- Hands-on experience with relational databases (e.g., PostgreSQL, MS SQL, Oracle, MySQL)
- Ability to analyze business and technical requirements effectively
- Familiarity with testing tools like Jira, Azure DevOps, or TestRail
- Excellent test documentation skills
- Good understanding of testing techniques (equivalence partitioning, boundary value analysis, etc.)
- Strong organizational skills and independence in work
- Experience working in Agile/Scrum environments
It is a strong plus if you have: (optional)
- Basic knowledge of test automation tools (e.g., Postman, Python, Java, Selenium)
- Familiarity with CI/CD pipelines
Language Required for the role:
English – good command required
Eligibility for the role:
Only candidates with an existing legal right to work in the European Union will be considered for this role.
#MAKEYourCareerBETTER
Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.
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