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Nduka Marvelous
@alonso_williams
Level 2
GoHighLevel AI Receptionist, Ai Voice Agent Developer, GHL, n8n, retell ai
Nigeria
English, Spanish
About me
An AI Receptionist and Ai Voice Agent bot Developer building automated phone systems that speak like humans. I design and scale custom calling setups using Retell AI and Vapi. Everything routes through custom n8n workflows to tie directly into your GoHighLevel setup. My systems eliminate manual front-desk work. The bot answers inbound lines instantly, qualifies prospects, and schedules appointments on autopilot. You get ultra-low latency, clean prompt logic, and instant CRM data syncing. Stop letting warm leads sit.
Contact me to deploy your automated voice system today.
Skills
Nduka Marvelous
$15/hour
Offline •
Average response time: 1 hour
See my services
Automations & Agents
I will ai receptionist ghl appointment booking retell ai voice agent vapi ai cold call
AI Technology Consulting
I will setup claude cowork expert consultant, teach claude code ai agent integration
Want to work on an hourly basis?
Tell Nduka Marvelous what you need.
$15
/
hourPortfolio
Work experience
AI Voice Agent Developer & Automation Architect
Consulting • Freelance
Jun 2026 - Present • 1 mo
Architected a production-ready AI Voice Agent to serve as an autonomous AI receptionist for a medical clinic. Engineered custom backend n8n automations and Cliniko API integrations to handle complex inbound call logic. The system successfully checks real-time practitioner availability, identifies correct appointment slots, and books patients directly into the clinic's CRM. Successfully resolved complex API routing and data synchronization challenges to deliver a seamless, end-to-end Healthcare Automation and Business Automation solution that completely eliminates manual appointment scheduling. ai receptionist ai voice agents gohighlevel automation booking
Lead AI Voice Agent Developer
Upwork
May 2026 - Present • 2 mos
Designed and deployed a live, production-ready AI receptionist for a medical clinic to fully automate patient intake and scheduling. Engineered complex backend n8n automations to connect a Retell AI voice agent directly with the clinic's Cliniko CRM via API. This live system autonomously checks real-time practitioner availability, handles patient routing (identifying new vs. existing patients), and seamlessly books appointments into exact time slots without any human intervention. Successfully navigated advanced API routing, data synchronization, and fallback logic to deliver a flawless healthcare automation workflow that completely eliminates manual front-desk bottlenecks. ai receptionist ai voice agents gohighlevel automation booking
Outbound Voice AI Agent Developer
Self Employed • Freelance
Feb 2026 - Present • 5 mos
Eliminated human sales team burnout from manual dialing by developing a relentless outbound Voice AI Agent. Orchestrated Retell AI and n8n to instantly dial new web leads within 60 seconds of form submission. The AI Agent Development included advanced objection handling, seamless pipeline stage updates in GoHighLevel CRM Automation, and an automated SMS fallback system via n8n
24 Reviews
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-5 out of 24 Reviews
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Most relevant
ali_otn
Repeat Client
Morocco
Working with Marvelous was a great experience. He successfully built and automated our AI voice calling system using Retell AI, GoHighLevel, and n8n. The project included AI outbound calling automation, CRM integration, appointment booking workflows, callback handling, and automatic call summaries synced...
Helpful?
ali_otn
Repeat Client
Morocco
Marvelous delivered exactly what was promised! He successfully built an inbound AI voice agent using Retell AI and the ElevenLabs voice integration sounds incredibly natural to callers. The n8n automation works flawlessly behind the scenes, seamlessly booking appointments and pushing accurate customer...
Helpful?
shonna1
United States
I was interested in having a Bot set up to make 200-250 cold calls f real estate a day. After doing my research I found out that can not happen. The limit is 100 calls per day. Also their are other things that have to be set up before you can do this. -Seller did not advise me of this. I explained...
Helpful?
natomasrealty
United States
Marvelous did an excellent job setting up my AI assistant/Receptionist, he is very knowledgeable and great to work with! He is a hard worker and even stayed up late working due to the time difference, highly recommended!
Helpful?
emma_injury
United Kingdom
New to Fiverr, wasn't sure what to expect but Nduka has been fab, very contactable and able to do the work with a few suggestions too :). Really happy with the project and would use him again 100%
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