Hey, I am having more than 10 years of experience in Asterisk PBX and have confident enough to work with you on this project.
I have gone through your requirement, and you are looking for a VoIP developer to build an IVR with Freepbx/Raspberry Pi.
Thanks for reading my proposal. Looking forward to hearing back from you soon.
(Note : Proposal amount may vary based on finalization of SOW)
Thanks & Regards,
Arpit