do you know them of any previous project?
Yes, collaborated them during another project.
where can I have more information apart of they have in their websait about their previous projects and experience?
they have links to their linkedin profiles in their website, down the explanation about their experience and their rol in the project
Even, you can find the links to the Twitter and Facebook account of Oleksii Vinogradov, who is the CEO and one of the founder of the project