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Offer summary
(Summary generated by AI based on the full job description)
The project involves testing web and mobile applications in the largest Testing Services Center in Poland. It requires experience with AI tools (GitHub Copilot, Claude Code), API testing (Postman, Swagger), proficiency in SQL, and working in Agile methodology. Responsibilities include creating and executing tests, bug reporting, and collaborating with developers to ensure product stability. Benefits include private healthcare, benefits package, and opportunities for growth via training and mentoring.
from: 27 July 2026
to: 26 August 2026
salary not specifiedB2B contract
Offer parameters
level:senior
working mode:hybrid • full office
Białystok, Centrum
Requirements
Expected technologies
API
Postman
SQL
GitHub Copilot
Optional technologies
WCAG
ETL
Our 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
Optional
- ISTQB certificate
- Experience with WCAG or ETL/Data testing
- German fluency
- Preferred candidates from Białystok
Your responsibilities
- 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
About the project
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.
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
Recruitment stages
- 1.Send your CV
- 2.Talk to us about your expectations
- 3.Learn more about our projects and choose the best
- 4.Start your adventure with Sii!
Sii Sp. z o.o.
Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.
Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.
This is how we work
Manual Tester (f/m/x)
I apply to:
Sii Sp. z o.o.
Białystok, Centrum
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