Regardless of whether you are forward about it in your resume, there are two things to consider that you havn't mentioned: 1) The actual issue is not whether y

Regardless of whether you are forward about it in your resume, there are two things to consider that you havn't mentioned: 1) The actual issue is not whether you should mention it on a but whether a potential employer would have an issue if they knew/found out you had built one of these sites. The subtle difference is that even if you don't disclose on your resume, you need to consider whether they would be ok if they found out post-hire. You might say "yeah I didn't mention it because it wasn't relevant to my candidacy" but you should consider that they might have an issue and what the consequences might be... ostracized and thus sidelined for promotion by management, even loose your job perhaps, etc. (I personally would hope not, but that is the crux of your dilemma in your OP is that others might) 2) Even if its not on the resume you probably need + should disclose all of the projects you are working on during the interview/negotiation stage because most employment contracts will ask you to disclose any possible conflict of interest + you will want to ring-fence your IP so that they can't claim your next venture started post-hire belongs to them (see also http://news.ycombinator.com/item?id=1685431 http://news.ycombinator.com/item?id=1685431) When I was 17 I ran a pretty successful free email site in the UK called fuckyou.co.uk. I tried to apply to IBM's early-intake (ie non-university) entry route for aspiring developers. The technical interviewers thought it was great, the non-tech HR people were very concerned. I made it to the final few candidates but I think the site was a blip on my evaluation forms and ultimately may have cost me a place there. 12 years later I'm hardly crying over not getting into IBM but it's fair to say it closed doors to the corporate software world (yay!)