SIP & MRCP Protocol Development

I'm looking for an experienced developer to implement SIP and MRCP protocols. The main focus will be on SIP and all components of MRCP integration on Cisco PBX

Key Requirements:
- SIP Protocoln
- MRCP Components: TTS, ASR, Speaker verification/identification

Ideal Skills and Experience:
- Strong background in SIP and MRCP protocols
- Experience with TTS, ASR, and speaker verification technologies
- Ability to design and implement robust media negotiation strategies

Please provide examples of similar work done and relevant qualifications.