April 25, 2026
C++ Developer – telco sector (f/m/x)
Mid • Hybrid
Krakow, Poland
Join our team at Sii to work on an exciting project in the telco area. As a C++ Developer, you'll have the opportunity to develop pioneering advancements in 5G technology, IoT solutions, and next-generation network infrastructure. You will be contributing to projects that shape the future of global communication, working alongside top professionals in a dynamic and innovative environment. Be a part of something big and take your career to the next level with us!
Your tasks
Work as a C++ developer for high-performance and high-reliability mobile network systems and applications
Collaborate with cross-functional teams to design, implement, and test new features and functionalities
Troubleshoot and debug complex system issues, leveraging your knowledge of telecommunications protocols and standards
Participate in code reviews and maintain coding standards, ensuring high-quality and maintainable code
Create and/or manage CMake build configurations
Work agile to provide high-value contributions as a member of a scrum team
Requirements
Experience in software development in the telecommunication industry (mobile networks preferred)
Prior experience working with network protocols and telecommunications standards
Minimum 3 years of experience in C++ development
Strong experience with Linux operating systems, including development and debugging
Familiarity with version control systems, such as Git, and collaborative development workflows
Ability to work effectively in a team environment and communicate complex technical concepts clearly
Good command of English (communicative for all work purposes)
Fluent Polish required
Residing in Poland 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
If you want to work on systems with high operational significance — apply now!
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