I don't know any polish, but this seems to be the name of his company rather than his actual name, which would be just 'Dariusz Jakubowski'. I concluded this because the entry that contains the bobby tables reference is called 'Firma', which means 'Company', and the website seems to be a registry of polish companies too (at least that's what I got out of it with Google Translate :D)
You're absolutely right. And the guy is a software developer (kind of obvious)