Hello,
My name is Irfandar
I have completed lot of projects in Asterisk PBX, Voip, which is almost related to your projects descriptions.
I am expert in R programming, python, java , Asterisk PBX, Software development.
Key skills:-
Software development, R programming, C, C++ languages, Software architecture, .Net, Ruby on rails , cryptocurreny, Python, Asterisk PBX.
For further details please discuss with me over chat.
Thanks.