"I work very hard at my job."

Translation: Muncesc foarte mult la serviciul meu.

[pinny.l.ro]

mult is a lot. Hard is grew. Is this correct or its my mistake?

[razvan.marin]

Yes, but when you say you work very hard, you mean that you put a lot of passion and time into it, not necessarily that it is difficult. We express that meaning of hard work by saying munesc foarte mult.