Hi!
I am a professional C++/C/C# software developer with 17+ years of experience. Currently (last 4 years) I work as an architect for company, which creates .Net-based client-server software (& of course we use Web API there). So, I hope I can help you with that task.
However, before reviewing my bid, please share the project' details, so I can understand requirements better - currently my bid is just a 'guess' of your needs.
Thanks in advance & good luck with your project.
Regards,
Svyatoslav Nikolsky