I think nowdays you have the next variants: 1. Hire an HR to find you inhouse specialist (it costs a lot) 2. toptal.com - top 3% developers (it costs a lot)

I think nowdays you have the next variants: 1. Hire an HR to find you inhouse specialist (it costs a lot) 2. toptal.com - top 3% developers (it costs a lot) 3. odesk.com - really need to be a good manager and HR in one face to find a good one developer. 4. remoteyoda.com - the best variant for small businesses.