Dear hiring manager,
We have great expertise in Asterisk and FreePBX development. Since last 12 years, I am into this Telephony Software development. I have done many projects almost 500+ Asterisk. I have gone through your requirement and believe that I can help you in your need. I am also Digium Asterisk Certified Developer.
I am sure once you talk with me, you will be more happy to work with us.
If you are interested, please share me your Skype, we can talk further.
Regards,
Jack