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Fiverr Pro
Nederlands
$
USD
Nduka Marvelous
@alonso_williams
Level 1
AI Voice Agent, Chatbot Developer, Retell ai, Vapi ai, Gohighlevel, n8n
Nigeria
Engels, Spaans
Over mij
No business should lose a deal to a slow response. My mission is simple: eliminate missed opportunities and turn every lead into revenue.
I architect intelligent, always-on systems that work for you 24/7.
What I build:
• Custom Vapi AI inbound voice agents
• Relentless Retell AI outbound cold callers
• Advanced n8n automation workflows
• Flawless GoHighLevel API integration
Every AI agent I deploy is built to convert and sync perfectly with your CRM.
Send me a message today to discuss your project!
Skills
Nduka Marvelous
US$ 15/uur
offline •
Gemiddelde reactietijd: 1 uur
Bekijk mijn diensten
Automatiseringen en agents
I will ai voice agent for vapi ai appointment, gohighlevel n8n, retell ai cold caller
AI chatbot development
I will build ai whatsapp chatbot for service business with n8n,ghl,manychat
Wil je op uurbasis werken?
Vertel Nduka Marvelous wat je nodig hebt.
US$ 15
/
uurPortfolio
Werkervaring
Outbound Voice AI Agent Developer
Premier Real Estate Agency • Freelance
Feb 2026 - Present • 3 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
Luxury Travel Chatbot & Voice AI Agent Engineer
Luxury Travel Agency • Freelance
Feb 2026 - Present • 3 mos
Addressed the pain point of managing complex, multilingual booking inquiries. Engineered an omnichannel Chatbot and Voice AI Agent using the OpenAI API and JavaScript. The system utilized complex routing to handle flight availability checks, providing sub-second latency responses and seamless handoffs to human agents.
Vapi Voice Agent Developer & Prompt Engineer
Vox AI Solutions • Freelance
Jan 2026 - Present • 4 mos
As a Vapi Voice Agent Developer, I specialize in prompt engineering, conversational AI, human-like voice agents, Vapi configuration, system prompts, latency optimization, objection handling, bilingual agents, voice cloning, speech-to-text optimization, text-to-speech tuning, ElevenLabs integration, deepgram configuration, function calling, structured outputs. Hire voice AI developer to create human-sounding receptionists, Vapi expert to optimize system prompts for natural pacing, prompt engineer for objection handling scripts, AI voice developer for multilingual support, expert to fix Vapi latency issues. Using tools like Vapi, OpenAI GPT-4o, Claude, ElevenLabs, Deepgram, Retell AI, JSON schemas. Job tags: AI Agent Development, Artificial Intelligence, Chatbot Development, Prompt Engineering, Natural Language Processing, English, Voice-Over. This role focuses on eliminating robotic tones, refining conversation flow, and maximizing user engagement.
15 Reviews
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shonna1
Verenigde Staten
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...
Nuttig?
neuel_javier
Australië
Great experience working with Marvelous! He quickly understood the issues with my AI agent and fixed both the response quality and the Google Calendar integration. Communication was smooth, and he delivered exactly what was promised. Everything is now working perfectly. Highly recommend if you need help fixing or improving an AI agent. Thanks again!
Nuttig?
jreedd
Verenigde Staten
This was a build that he was able to complete with my collaboration, specifically for the purpose of a SaaS product that required a call agent and workflows.
Nuttig?
felix_jake
Verenigd Koninkrijk
Working with this Marvelous was an excellent experience from start to finish. Communication was clear, professional, and fast. He understood exactly what my real estate business needed and built an AI voice agent that works perfectly. It sounds natural, captures leads accurately, and even books appointments...
Nuttig?
snowstriker
Terugkerende klant
Oostenrijk
Excellent work! They perfectly configured my GoHighLevel AI voice agent and workflow automations exactly as requested. The integration was seamless and delivered on time. Highly recommend for any GHL or ai Voice agent setups!
Nuttig?
