As the title suggest im looking for a reliable and great developer.
Best way i've found good ones is by searching Twitter.
Search for iOS or Android Developer. Then contact them via there or email from their portfolios.
I've found some very high quality guys with some twitter searching times!
Search for developers with a lot of iOS (Objective-C) and Android (Java) projects on Github - https://github.com/trending/developers?l=objective-c
All the guys who write on Ray Wenderlich's iOS blog are also hardcore mobile developers: http://www.raywenderlich.com/about#abt_tutorial-team
@adsurfer - can't believe I hadn't thought of that Github trick. Nice one.
I'm currently hiring a dev so will definitely put that into action next week.
What's the technology stack?
Good english-speaking developers are getting harder to find right now because of startups and the current hiring frenzy but you should find someone on the freenode irc server in programming language-specific channels. We all like to hang out on IRC. Feel free to come in and kindly ask if anyone has time for a freelance project.
If a freelancer makes it to the interview process, feel free to drop me a message on skype (bespokesz) and I'll review their github and give you my professional opinion.
Another good suggestion! Firing up my old IRC client now...
Tech stack: good old fashioned PHP / MySQL, but with a LOT of production experience and some maths thrown in.