Hello! I think this task could be a perfect match for me! I am a blockchain developer, and my main project currently is the development of a proof-of-stake block-lattice based crypto currency. I am working on it a the lead developer (since Sept 2018). It was started as a fork, but we had many changes, some funndamental. The project is written in C++, with Boost lib for portability, and also Qt for dev wallet. Main wallets are javascript framework based. I got experience not only with core blockchain node internals, but all the other surrounding infrastructure as well -- APIs, explorer, bootstrap nodes, etc. So I think I have a perfect skill match for this task.
The description in not too detailed, but I assume you have clear ideas and we could quickly get to a shared understanding.
I have extensive development experience -- though new here on Freelancer, and I think I'm quite good at finding my way in unknown large SW projects.