We started working together in 2018, as part of an European Union subsidized project for digital innovation, back then the project was on Magento 1.
Since then we have managed to migrate this awesome project to Magento 2 and implemented a lot of custom functionalities that were not available for migration.
Since this has been initially a Magento 1 project, a lot of modules no longer had suitable extensions for transition to Magento 2, this pushed us to develop a lot of features for the new version.
Also necessary to take into consideration the big number of stores, almost one for each European country.
The responsive layout is handled using the Bootstrap CSS library.