SBC Development with Kamailio and RTPengine

I'm looking to build a Session Border Controller (SBC) focused on call routing. The SBC should support TLS and RTS/SRTP conversion, as well as enable SIP and MGCP protocols.

Key Features:
- Call Routing: Primary function
- Protocol Support: TLS, RTS/SRTP, SIP, MGCP
- Geographical Routing: Essential for my needs

Ideal Skills and Experience:
- Expertise in Kamailio and RTPengine
- Strong background in VoIP and SBC development
- Proficient in TLS, SRTP, SIP, and MGCP protocols
- Experience with geographical routing techniques

Please provide a detailed plan and timeline with your bids.