You will get Custom Vapi.ai Voice Agent for 24/7 Appointment Booking
Rising Talent
Rising Talent
Project details
Stop losing business to missed calls and robotic AI agents that frustrate customers. I specialize in building enterprise-grade AI voice receptionists that sound indistinguishable from human dispatchers.
Unlike basic "scripted" bots, my agents are built on Vapi.ai/Retell AI to ensure ultra-low latency (<700ms), giving your callers a natural, human-like experience. This project isn't just about "building a bot"—it’s about creating a business-critical system. Your new agent will autonomously qualify leads, verify details, check live availability in your calendar, and book appointments instantly.
Why choose me?
I focus on production stability. I don't just hand off a file; I integrate the agent with your CRM (GoHighLevel/HubSpot) and calendar, set up SMS/Email follow-ups to ensure your leads don't go cold, and provide a 7-day monitoring phase to tune the agent based on real-world call data. My goal is simple: to transform your incoming calls into a 24/7 revenue-generating engine that never sleeps, never gets tired, and always sounds professional.
Unlike basic "scripted" bots, my agents are built on Vapi.ai/Retell AI to ensure ultra-low latency (<700ms), giving your callers a natural, human-like experience. This project isn't just about "building a bot"—it’s about creating a business-critical system. Your new agent will autonomously qualify leads, verify details, check live availability in your calendar, and book appointments instantly.
Why choose me?
I focus on production stability. I don't just hand off a file; I integrate the agent with your CRM (GoHighLevel/HubSpot) and calendar, set up SMS/Email follow-ups to ensure your leads don't go cold, and provide a 7-day monitoring phase to tune the agent based on real-world call data. My goal is simple: to transform your incoming calls into a 24/7 revenue-generating engine that never sleeps, never gets tired, and always sounds professional.
Machine Learning Tools
AnyLogic, Azure Machine Learning, ChatGPT, Fiddler.ai, GPT-3, Oryx 2, Python, Sonnet, SQL, Vertex AIWhat's included
| Service Tiers |
Starter
$250
|
Standard
$500
|
Advanced
$1,000
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 6 days |
Number of Revisions | 0 | 0 | 0 |
Model Validation/Testing | |||
Model Documentation | - | - | |
Data Source Connectivity | - | ||
Source Code |
Frequently asked questions
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AO
Ayotunde O.
Apr 20, 2026
AI Voice Agent Developer (Retell AI Integration) | Customer Support & Sales Automation
Working with Caroline was a great experience. She built a solid automation system for us, and everything just works the way it should smooth, reliable, and no unnecessary complexity. She really understands how to structure workflows properly, and even improved things beyond the initial setup. Communication was easy, and she handled feedback quickly without any issues.
If you need someone for Make com automation who actually knows what they’re doing (and doesn’t overcomplicate things), I’d definitely recommend her.
If you need someone for Make com automation who actually knows what they’re doing (and doesn’t overcomplicate things), I’d definitely recommend her.
SA
Sidiq A.
Apr 18, 2026
AI Voice Automation Engineer (Vapi AI + n8n) | Healthcare Patient Communication System
Great experience working with Caroline. She built a high-quality AI voice agent using Retell AI, with smooth conversation flow, lead qualification, and booking functionality.
The system works reliably and handles customer interactions in a natural, professional way. Communication was clear, and everything was delivered on time with proper testing.
Highly recommend for AI voice agents and conversational AI projects.
The system works reliably and handles customer interactions in a natural, professional way. Communication was clear, and everything was delivered on time with proper testing.
Highly recommend for AI voice agents and conversational AI projects.
FA
Folawe A.
Feb 5, 2026
Vapi AI Voice Agent Setup for Inbound Calls (Pilot Project)
Excellent experience! Caroline built a high-quality AI Voice Agent for my agency using Vapi.ai. The agent sounds professional, handles inbound calls perfectly, and integrates with Calendly for easy booking. Fast delivery and great technical expertise in AI automation.
About Caroline
AI Voice Agent Dev | Retell AI | Synthflow | Vapi AI | Twilio + make
100%
Job Success
Akure, Nigeria - 12:29 am local time
Your AI voice agent answers the call, then breaks. Audio drops. Missed turns. Automations fail.
I take AI voice agents from “working demos” to production-ready systems by fixing telephony, real-time audio, AI agent logic, and automation workflows so they run reliably in live calls.
I specialize in AI Agent Development with a strong focus on automation, CRM automation, and API integration, the parts that usually fail under real user behavior.
This isn’t IVR demos or fragile test setups. I build systems that survive real callers, interruptions, noise, latency, and edge cases.
When clients bring me in
The agent works in testing but fails on real calls
Audio is one-way, delayed, or cutting out
Barge-in and turn-taking feel broken
Automations fire inconsistently across tools
Call logic collapses once users behave unpredictably
I fix the root cause, not surface symptoms.
What I actually do
Debug inbound and outbound AI voice agents end-to-end
Fix telephony, SIP, WebRTC, and real-time audio issues
Stabilize speech-to-text and text-to-speech pipelines
Improve pacing, barge-in, interruption handling, and call flow
Harden automation workflows for production use
Review call logs and turn failures into concrete fixes
Prepare agents for real users, not demos
Voice agent systems I work on
AI receptionists and call handlers
Appointment scheduling agents
Lead qualification and outbound calling agents
Tier-1 customer support voice agents
Internal ops, routing, and escalation agents
Inbound or outbound. Single flow or multi-step systems tied into CRM and lead management automation.
Tools & stack
Vapi. ai, Retell AI
Telnyx, Twilio (VoIP & telephony)
ElevenLabs (TTS), Deepgram / STT pipelines
Make. com, n8n (automation & process design)
GoHighLevel, CRM automation
Webhooks & API integrations
Real-time audio streaming pipelines
I work across the full chain: call → audio → AI agent logic → automation → CRM.
Why clients hire me
I work on live production systems, not prototypes
I understand real VoIP behavior, not just prompts
I can trace failures across AI agents, automation, and CRM workflows
I document fixes and leave systems maintainable
I’m comfortable taking over messy builds and stabilizing them
Engagement style
Clear scope and fast diagnosis
Short optimization phase first
Then production hardening and iteration
Available for ongoing automation and support if needed
If your voice agent is close but unreliable, I can get it across the line.
Steps for completing your project
After purchasing the project, send requirements so Caroline can start the project.
Delivery time starts when Caroline receives requirements from you.
Caroline works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement & Script Analysis
We kickoff with a call to review your business FAQs, appointment logic, and transfer criteria.
Voice Persona & Prompt Engineering
I configure the agent’s personality, voice clone (via ElevenLabs), and conversational flow to match your brand.