Telefonica O2

Media Markt i Saturn Super Select

Media Markt Super Select
Saturn Super Select

Portal and mobile application for management of tariffs and
customer's mobile services.


Do you remember those times when you had to go to a customer service point or call a hotline to change the tariff or account information, incurring considerable connection costs? We remember. We also remember all the work we put into changing this state of affairs.

Together with Telefonica Germany GmbH & Co OHG – more commonly known as O2 – we have changed the approach to handling broadband and mobile services such as minute packages and data packages. The challenge we faced was to create a system that would enable immediate access to tariffs and mobile services from anywhere in the world, without the need to use a hotline or visit stationary points. In addition, the solution was to be flexible enough to be quickly deployed to different customers in configurations tailored to their needs.

Project parameters

Telefonica Germany GmbH & Co OHG – O2

  • Product analysis and development
  • Integration with CRM and billing system
  • Testing automation
  • CI/CD
  • Product development
  • Scrum
  • Android application
  • iOS app



We have created a portal and a mobile application used by over 50,000 users.

They enable the selection of tariffs and their personalization, insight into the statistics of telephone calls, sms / mms, mobile data consumption and the costs of tariff plans. This solution gives the user the ability to make changes to current services and personal data, download documents (e.g. invoices) and top up accounts.​

We have also implemented this solution in personalized configurations for other O2 clients: Saturn, Kaufland, Türk Telekom, Kabel Deutschland.


Spring Framework


Mobile interface


EO Customer Feedback