Passion forTechnology

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With over 2700 specialists, Sii is the TOP IT and Engineering services provider in Poland

Our offer Sii Practices provide word-class services and solutions in the following competence areas.

Sii in numbers

Power People
space in m2
Yearly revenue
in millions of PLN
worked in 2015

Our references


Martyn Oswin - Dyrektor ds. Rozwoju IT w DFC UK

What I really do appreciate is the fact that Sii is very responsive to my needs. I can be a quite demanding business partner and  if I have a need to scale up results very quickly Sii is ready to meet that need. And I’ve never yet been disappointed. That’s been good.


Samu Saastamoinen - CEO and Founder of Scrooge

We chose Sii as a business partner as it is cost-effective. Also, the company can offer the whole package – the development and maintenance, which in other countries is difficult to find. The cooperation between our companies is great. Though it has over 2000 employees, we feel like we are dealing with another start-up as it is very flexible.


Gabriel Buchała - Chief Engineer CBU DELPHI

Sii Poland’s engineers are specialists who live up to our expectations as to their knowledge, ability to carry out most complex projects, work style and adopted approaches. As other corporations, we are obliged to follow certain procedures, processes, thus, even the project launch and commencement of cooperation with Sii required from Sii maximum flexibility, which in fact, came to us a pleasant surprise!


Marcin Matysiak - Head of IT Department

Sii Poland is our long-term partner committed to our development and success. Sii’s experts have projected immediate understanding of our needs and supported us throughout an extensive project with their extensive skills and professional advice. They completed our project on time and on budget, by which, they fully justified our trust and lived up to our expectations.


Adam Stańczak - Head of Application Department at ENERGA

The proposed by Sii Poland candidate turned out to be a perfect match for our projects. As a Project Manager, he impressed us with his professionalism and ability to learn quickly. If all Sii’s outsourcing resources perform so well, I highly recommend the company.

We keep on expandingto easily connect our specialists with clients worldwide.

Career Portal

The high quality of services we provide to our clients is attained thanks to the engagement of our Sii Power People in each location. Learn more about development opportunities at Sii on our Career Portal!

Press room

Industry recognition
We are proud to be regularly honored with awards recognizing our leadership in the IT and Engineering market, rampant development and dedication to achieving employee and client satisfaction.

Proof of Standards

The high quality of provided services and our observance of the most rigorous security standards are confirmed by world-recognized certificates.

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