AI Voice Agent Automation Developer

I need a freelancer to build AI voice agent automation for an ongoing contract. You should be able to demonstrate relevant previous work and have experience working with Vapi, Retell, Elebanlabs, Twilio and custom backend development. The role involves developing and maintaining voice-based automation solutions, collaborating on implementation, and supporting continuous improvements. Please share examples of similar projects and your availability for a long-term engagement. Looking for someone experienced who can work with us on an ongoing basis.