New offer - be the first one to apply!
December 17, 2025
Mid • Remote
Białystok, Poland
Join Sii as a cloud software tester and become part of a telecom project where you’ll work on securing and managing signalling and media traffic in modern CNF environments. You’ll collaborate with a diverse international team, contribute to innovative R&D initiatives, and develop your skills in a dynamic, cutting-edge environment.
Your tasks
Creating and updating testing materials such as plans, strategies, and scripts
Diagnosing issues and managing defects
Reconfiguring and preparing lab environments
Performing system, functional, and integration tests
Requirements
Minimum 4 years of experience in software testing
Solid understanding of IP networks, their protocols, and architectures
Proficiency in Linux environments, including terminal-based workflows
Experience with virtualization (esp. Kubernetes) and cloud platforms (esp. OpenShift/OpenStack, VMware)
Coding skills (esp. Python)
ISTQB certification is considered an advantage
Residing in Poland required
Fluent Polish and English required
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
Join the Sii team – develop your skills, gain experience, and build your career!