Should I use nofollow or don’t I have to worry about that?

[soulmktpro]

I'm a developer and each time than I put at the bottom of the sites I build my company's logo with a link to our site. Could This action harm my website? Should I use nofollow or don’t I have to worry about that?

[firstconversion]

If you build really crappy spammy websites, then you should worry about getting links from them

Generally web designers or developers putting links back to their own sites on sites someone else paid them to build is seen as pretty amateur and a dick move generally

[EwanFisher]

If these are new sites they will be passing very little authority, these will also be site wide links.

If you are going to do it then id "nofollow" them.