Does Viens mean just as well as Come

Possibly you are thinking of the "Le Passé Proche" using venir de + infinitive e.g. 

"Je viens de finir mon livre" - "I've just finished my book"

It's explained here:

Expressing the close past in French using "venir de" + [infinitive] (Le Passé Proche)

Oui

'Vient' means 'come'. 'Vient de' means 'have just come'. In the latter case you must follow 'have just come' by the infinitive.