I'm computer engineering TA 10+ years f experience,
I'm currently working n a project implementing full mobile network implementation using openBTS+Astreisk +SIP Protocol+VOIP bridge using USRP Software define radio and ZUNQ based board so I can help you for the first part.
For the second part dealing with the NXT - Etherum ,,etc. I had also some experience simulating some parts of the encryption techniques which most of the crypto- currencies are built over them in FPGA
we can negotiate about the project details and setup an NDA along with major milestones of the project - I'll recommend you the needed hardware or work based on your available purchased hardware