A person of that status should be qualified to write a recommendation letter for you. (Usually get it from a person who himself has a standing in market, or some credentials that prove that he is a known entity in digital sector)
About recommendation letter - in Document checklist from the official guide, it lists everything that a recommendation letter should contain. The format of the document will be something similar to a recommendation letter (like we get for MBA applications, but this one needs to address Technation specifically) that talks about your achievements and strengthens your claim of being a leading talent.
@Andrii_Seleznov has written a few blog posts on this topic, which you will find very helpful.