Hi,
I can help with that. I have an excellent experience with C#, ASP.NET, ASP.NET CORE, MVC, and Web API. besides the very good experience with cryptocurrency. I already have built some sites depends on cryptocurrencies using core API and 3rd party API's you may check:
https://www.freelancer.com/projects/software-architecture/Platform-similar-Twicecoin/details
if you don't mind contact me to discuss all the details and go further.
for more reference about me, you may have a look at my profile.
Regards,
Amr