I can definitely tell that this project was the best one regarding technologies. Shortly, after I started to work on this project, it was decided to rewrite it as technologies were a bit outdated (old version of React). Right after that me and our team were deciding what to use. We picked a lot of modern tools for React, like reselect, redux-saga. Also we decided to use Ramda which gave me a big boost in understanding of functional programming. Unfortunatelly, after some time I was reassigned to another project. But I gained invaluable experience in architecturing a new project!