Manual Tester (f/m/x)
Sii Poland • Suwałki, Podlaskie Voivodeship, Poland
**Role & seniority: ** Senior QA / Testing Engineer (≈ 5+ years)
**Stack/tools: **
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Web/mobile testing
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AI tooling for testing efficiency: GitHub Copilot, Claude Code, LLM-based test generation
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API testing: Postman, Swagger
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Bug tracking: Jira / TestRail / qTest / Zephyr / Azure DevOps
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DB: SQL
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Agile methodology
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Top 3 responsibilities:
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Design and create test cases/test scenarios
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Plan and execute integration and contract testing
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Report defects; prepare test reports/documentation and maintain test quality; collaborate with developers on critical paths
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Must-have skills:
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5+ years testing web and mobile applications
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Test design techniques knowledge
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Hands-on AI tools usage for testing; interest in testing AI/ML features
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API testing experience (Postman/Swagger) and SQL knowledge
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Experience with a bug tracking system (one listed)
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Agile experience
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Good communication, attention to detail, teamwork; English + Polish (B2)
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Resident in Poland required
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Nice-to-haves: ISTQB, WCAG or ETL/Data testing, German fluency, preferred candidates from Białystok
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Location & work type: Poland; work type not specified in text (office/workplace implied; “comfortable offices” mentioned).
Full Description
Join our Team – the largest Testing Services Center in Poland, created by testers for testers, in a company routinely awarded with Great Place to Work awards.
We help our employees identify, use, and grow their strengths by providing interesting projects and constant access to knowledge through our own training platform, webinars, a unique mentoring program, and experience exchange within our Community.
Your tasks
Creating test cases and test scenarios Planning and executing integration, contract testing Reporting all encountered problems and errors Preparing test reports, creating documentation Ensuring all tests maintain the highest quality Working with developers to understand the critical paths and ensure product stability
Requirements
At least 5 years of experience with testing web and mobile applications Hands-on experience using AI tools (e.g., GitHub Copilot, Claude Code, LLM-based test generation) to improve testing efficiency — and an interest in testing AI/ML features themselves Knowledge of common test design techniques Previous work with API testing (Postman, Swagger) and SQL databases
Familiarity with one of the following bug tracking systems: Jira, TestRail, qTest, Zephyr, Azure DevOps Experience of working in Agile methodology Openness, good communication, attention to detail, and the ability to work in a team Fluency in English and Polish - at least B2 Residing in Poland required
Nice to have
ISTQB certificate Experience with WCAG or ETL/Data testing German fluency Preferred candidates from Białystok
Job no. JOB-M8TDX
Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.
Benefits For You
Great Place to Work Solid financial situation Contracts with the biggest brands Centre of internal trainings Many experts you can learn from Open and accessible management team Profit sharing Passion Sponsorship program Regular integration events and trips Comfortable and well-equipped offices MySii app Medical care
