I'm sure some of you must be site developers / designers or else know people who are. If so I have a mate looking for someone to work with on a business site, she needs a reasonable level of complexity with user account management / news / blog / shop / payment processing etc PM me with examples of your previous work if interested.
Find those on sites like http://freelancer.com! I know plenty of people who do what you are looking for, but I don't think I should refer any, it's better if you two choose them yourselves. Funnily I'm also looking for somebody who can code mobile apps. Not related to current projects here, tho, and I haven't started looking yet. So I kinda have to hijack you here, mate. I'll buy you a pint! Please pm me, too, if you can code for Android and iOS!
I think that it's better to hire a professional freelancer than to use the online one. There are enough job boards nowadays where you can find a lot of freelancers in need of a project to work on. I recommend this one: XPlace. There are a lot of talented freelance experts and it is commission-free.