
Joseph cline
Conversational AI Voice Agent Expert Business Call Automation
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Voice Agent Developer & Automation Specialist
Upwork • Freelance
Sep 2024 - Aug 2025 • 11 mos
Specialized in building and deploying AI voice agents for inbound and outbound call automation using Retell AI, Vapi, and Twilio. Delivered end to end phone systems including IVR pipelines, AI receptionists, outbound cold callers, smart voicemail, and multi-step call routing all integrated with CRMs like GoHighLevel and HubSpot, workflow automation tools like n8n and Make.com, and calendar booking systems like Google Calendar and Calendly. Clients span real estate, healthcare, home services, insurance, SaaS, and eCommerce. Every system is built for 24/7 operation, handling lead qualification, appointment booking, FAQ responses, and customer support without human intervention. Core deliverables include custom LLM-powered conversation flows, voice persona configuration, webhook integrations, real-time call transcription, post-call CRM updates, and SMS follow-up automation. Platforms used include OpenAI GPT-4, ElevenLabs, Deepgram, Twilio Studio, Retell AI, and Vapi AI. Also experienced in building no-code and low-code automation pipelines using n8n, Make.com, Zapier, and Power Automate connecting voice agents to backend systems, databases, and third-party APIs for fully automated business workflows. Every project is delivered with a working demo, full documentation, and post-launch support to ensure smooth handover and long-term reliability.