Senior Manual Tester (f/m/x)

Senior • Hybrid

Warsaw, Poland

We are looking for a Senior Manual Tester to support a team of a global company operating in the electric mobility and energy domain. The project focuses on building and operating a platform that supports public charging services, energy solutions, and e-commerce functionalities across Scandinavian markets (Sweden, Norway, Denmark). The team works on a modern, microservice-based ecosystem enabling large-scale integrations, complex backend flows, and end-to-end customer journeys in the area of electric mobility and energy services.

Your tasks

Planning and executing integration, system, and usability testing
Participating in end-to-end and UAT testing activities
Validating complex backend flows across multiple microservices and integrations
Collaborating with developers to understand critical paths and ensure product stability
Strengthening cooperation with other development teams
Working closely with cross-functional and cross-team stakeholders to improve overall product quality

Requirements

At least 5 years of experience in software testing, including planning, execution, and evaluation of tests
Strong background in backend testing within microservice-based, asynchronous, and event-driven architectures
Hands-on practice with API testing (Postman, Swagger), messaging flows (AWS SNS/SQS), and validation of data across integrated services
Practical knowledge of test and defect management tools such as Jira, TestRail, and Xray
Confidence in working with SQL databases, logs, and request tracing to ensure end-to-end quality
Solid understanding of the software development lifecycle and Agile testing approaches
Ability to communicate effectively and collaborate with multiple development and cross-functional teams
Fluent Polish and English, both written and spoken
Residing in Poland required

Nice-to-have requirements

Previous work in automation testing of mobile and web applications
Knowledge of REST API standards, HTTP protocols, and API contract validation
Experience or domain knowledge related to card payments or card management
ISTQB Foundation Level and/or ISTQB Advanced Level Test Analyst certification

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
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

If you want to work on systems with high operational significance — apply now!

Sii

Sii is a company recognized as a "Great Place to Work" since 2015, thanks to employee feedback and the implementation of new ideas. Established in 2006, Sii has demonstrated financial stability with a revenue of 2.1 billion PLN and no debts. The company shares its profits with employees, having allocated over 76 million PLN for this purpose since 2022. Sii offers a rich benefits package, including private healthcare, a cafeteria platform, and discounts on cars. Employees can work in comfortable A-class offices or remotely. Sii is involved in numerous fascinating projects for prestigious global brands and invests 1 million PLN annually to support employee passions and volunteer actions. The company emphasizes personal development through meetups, webinars, a training platform, and a technology blog. Sii is characterized by a fantastic atmosphere created by its "Sii Power People."

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