Hi.
I have about 15 years of programming experience. Mostly I used C, C++ and C# for my projects development.
Please, show me existing source code and provide some examples of desired interface.
As I understand you have also posted another project for code optimization (https://www.freelancer.com/jobs/C-Sharp-Programming/Code-optimisation/#placebid). I think it will be useful to consider both these projects as a one big job with several milestones.