I am a developer based in London developing a desktop WPF business application using c# (+ MVVM/DDD/Nhibernate/Unity/Postsharp...). I need to find someone to review my code to suggest improvements and then to write integration tests. This could potentially be an ongoing relationship, expanding into writing new features etc.

It would suit an experienced developer with a strong interest in design principles and writing clean code, who can work part time. However, the developer would need to work at my home based office (although timing is flexible).

Websites such as elance and odesk seem to tie you in, and I would prefer to pay a one off introduction fee and then deal with the developer direct. Stack exchange seems quite expensive but is a possibility if I don't find an alternative.

So, are there any other websites I can try?