Junit testcases

I am looking for an experienced programmer to help me with writing Junit testcases for a project. Specifically, I need unit testcases written in Java for the existing source code. I have the source code available for the programmer to use. The programmer should have extensive experience writing well-structured testcases for a variety of purposes. Specifically, I need testcases for verifying the correctness of the code and ensuring that it meets the desired requirements. The programmer should have a good understanding of the Java language and Junit framework. Knowledge of integration testing, regression testing and other related areas is also beneficial. It is important that any testcases written are thorough and robust. Timely delivery of the testcases is also critical.