[vidarh]

While there are some errors on your page, don't worry too much about it. It is fully possibly to understand and make sense of it.

As someone else said, he was being a dick about it, and the implication that English skills are somehow related to coding skills is obviously nonsense. (And he still managed to make mistakes of his own while criticising your language)

To be a bit more constructive, here's a slightly rewritten introductory paragraph that I believe reads more natural (though English isn't my native language either):

"There's an idea we have been working on for more than one year so far. As backend developers we were thrown into the mysterious world of frontend (client-side) apps without any good pattern for creating Single Page Apps. So we (GameBoxed + Arkency) invented one - hexagonal.js."

But the most frequently occurring English mistake on your page appears to be missing "the"'s. This error is very common with speakers of slavic languages. Based on the admittedly limited example of your English on the linked page, I think one of the biggest improvements you can get with relatively little effort would be if you spend some time reading up on how to identify where/how to use "the".