Hire the Best Vapi Developers

I build AI voice agents that answer calls, book appointments, and qualify leads, and RAG systems that turn large document libraries into instant, accurate answers. Expert-Vetted (top 1% on Upwork), Top Rated Plus, $300K+ earned across 250+ projects and 9,500+ hours. If you need an AI receptionist that handles inbound calls 24/7, an outbound voice agent for lead qualification and follow-ups, or an LLM assistant grounded in your own documents, this is the exact work I do every day. WHAT I BUILD AI Voice Agents (Vapi, Retell AI, Twilio, Deepgram, ElevenLabs) ➤ Inbound AI receptionists: call answering, FAQs, appointment booking, smart transfer to a human when needed ➤ Outbound agents: lead qualification, appointment reminders, follow-up calls ➤ Real-time call transcription, sentiment analysis, voicemail detection, and call summaries pushed to your CRM ➤ Telephony done right: SIP trunking, call routing, recording, and compliance-aware setups RAG and LLM Systems (AWS Bedrock, Claude, GPT, LangChain, pgvector) ➤ Retrieval augmented generation over large corpora: chunking, embeddings, vector search, reranking ➤ Document Q&A assistants and AI chatbots that cite sources instead of hallucinating ➤ Ingestion pipelines with OCR (Textract), queues (SQS), and cost monitoring Full-Stack Delivery Node.js, NestJS, FastAPI, Python, Next.js, React Native, PostgreSQL, MySQL, Redis, Docker, AWS (EC2, RDS, Bedrock, SQS). I ship the voice AI agent, the automation around it, and the product it lives in: dashboards, auth, billing, analytics. SELECTED WORK 🟢 SlayAI (legal AI platform): architected the RAG pipeline serving ~4,000 active users over a 300GB+ legal document corpus on AWS Bedrock, pgvector, SQS, and Textract. 97% answer accuracy in internal evals, with automated document ingestion and readiness checks. 🟢 HopDial (VoIP + AI calling platform): built live-call AI transcription and sentiment analysis on Twilio infrastructure with Deepgram STT and ElevenLabs TTS. 🟢 WhoseNo (my own product): high-traffic phone intelligence platform with 5.79M+ records, MySQL and Redis at scale behind Cloudflare, plus a companion Android app. WHY CLIENTS KEEP ME 96% Job Success across 178 reviews. Most of my work turns long-term: clients bring me in for one agent, and I end up owning their AI roadmap. I communicate daily, demo early, and never disappear. HOW TO START Send an invite or book a consultation. Tell me your call volume or document volume and the outcome you want. I'll come back with an architecture, timeline, and fixed scope.

Your team retypes data, chases leads by hand and misses calls after hours. I'm an AI automation specialist and AI agent developer, and I take that work off their plate. I build n8n, Make and Zapier workflows, AI agents and AI voice agents that answer calls, qualify leads, book appointments, and move data between your CRM and the tools you already use. 🏆 Top Rated | 100% Job Success | $20K+ earned 🌟🌟🌟🌟🌟"AJ knocked it out of the park! ... everything was delivered on time, not to mention he suggested and implemented 3 tools I had not even thought of." ✅ WHAT I'VE BUILT Inbound AI voice agent for home services (HVAC, plumbing, electrical). It answers 100% of inbound calls, 24/7. Built on Vapi and Twilio with custom MCP tools, it gives callers live information, books the job and adds it to the CRM on its own. A new customer goes from first call to confirmed booking without anyone on the team touching it. Outbound AI voice agent with email and SMS outreach, run from the CRM. Daily research automation in n8n. The client used to check 14 websites every day, pull the new data, sort it and enter it into their project management tool by hand. The workflow now runs daily on its own, collects from all 14 sources, uses OpenAI to sort, label and segment the data, and posts it straight into their project management tool. The manual work is gone. AI lead response in n8n and GoHighLevel. When a lead fills out a Meta ad or website form, the workflow writes a reply with AI, sends it by SMS and email, answers the lead's replies, and keeps the conversation going until your team takes over. The GoHighLevel version adds automated follow-ups. Outbound AI voice agent for lead enrichment. It calls each business on your lead list and confirms the details you have on file. ✅ WHAT I AUTOMATE Workflow automation. n8n, Make, Zapier and GoHighLevel workflows for lead intake, routing and follow-up, email and SMS sequences, reporting, and keeping data in sync across your tools. AI agents. LLM agents on OpenAI and Claude, with custom MCP tools, that research, sort and label data, draft replies, and hand off to a person when they should. AI voice agents. Inbound and outbound agents on Vapi, Retell AI, ElevenLabs and Twilio for call answering, booking, lead qualification, outreach and lead verification. CRM automation. Bookings, leads and follow-ups written straight into your CRM, so records update themselves. Custom code where a workflow tool stops. Python, APIs and webhooks. ✅ HOW I WORK 1. I map the manual work first: who does it, how often, and what it costs you. 2. You get a working version fast, so you react to something real instead of a spec. 3. I handle the unglamorous part: edge cases, error handling, logging and alerts, so nothing breaks quietly. 4. As you grow, I extend what's there instead of rebuilding it. TOOLS & STACK: AI Automation | AI Agents | AI Voice Agents | Inbound & Outbound Calling | n8n | Make | Zapier | GoHighLevel | Workflow Automation | Business Process Automation | CRM Automation | Lead Follow-Up | Vapi | Retell AI | ElevenLabs | Twilio | MCP | OpenAI | Claude | API Integration | Python ✅ START HERE Send me the task your team repeats most. I'll reply with how I'd automate it, which tools I'd use, and what it would cost to build.

You are already paying a premium for Meta and Google Ads. The traffic is there. But if your Meta Conversions API (CAPI) isn't firing, your ad attribution is lost, or your GoHighLevel webhooks silently fail, you are setting fire to your marketing budget. You bought into the GoHighLevel ecosystem to consolidate your software and scale. Instead, you are likely dealing with duplicate contacts, hitting the limits of basic Zapier connections, or struggling to force GHL to sync properly with your external, industry-specific software. THE BRUTAL TRUTH ABOUT HIRING ON UPWORK: Most freelancers pitching as "GHL Experts" are just drag-and-drop funnel builders. They will upload a generic snapshot, hit publish, and disappear. They don't understand JSON payloads. They don't know how to configure server-side tracking. They expect you to write the exact technical brief and manage their every click. If you want an order-taker to micromanage, I am not your guy. I am an independent Automation & Tracking Engineer—not an agency. If you want someone who takes a business problem, architects the data flow, writes the webhooks, tests every single node end-to-end, and hands you back a flawless, revenue-generating machine—we need to talk. HERE IS EXACTLY HOW I BULLETPROOF YOUR TECH STACK: • META CAPI & AD ATTRIBUTION TRACKING: I fix the silent killers of your ad campaigns. I build server-side tracking, GTM, GCLID preservation, and offline conversion uploads so Meta and Google actually know which leads are closing. • ADVANCED API & MIDDLEWARE INTEGRATION: Zapier is great for beginners; I build for scale. Fluent in Make com, n8n, and custom REST APIs. I connect GHL to external databases, CRMs, and custom software with proper deduplication and error handling. • OMNI-CHANNEL AUTOMATION ARCHITECTURE: I build logic-tight pipelines. Complex conditional branching, math operations, custom objects, and multi-platform syncs (e.g., pushing data simultaneously to GHL, Apollo, and Slack without data collisions). • AI VOICE AGENTS & LLM INTEGRATION: I integrate conversational AI (Vapi, Retell, Claude, OpenAI) directly into your GHL pipelines via webhooks to qualify leads and book appointments natively 24/7. • SYSTEM AUDITS & TECH OPS: Got a messy sub-account from a previous freelancer? I untangle broken workflows, resolve API errors, clean your database, and fix A2P 10DLC compliance so your SMS actually delivers. Whether you run a high-volume Ad Agency, a B2B SaaS, or a high-ticket service business, the goal is the same: flawless data flow and lower cost-per-acquisition. You do not need to walk me through every step. You show me the scope, I build it, I test the edge cases, and I ship a working system that produces results from Day 1. LET'S STOP THE DATA LEAKS IN YOUR FUNNEL. Click the "Invite" or "Hire" button at the top of this page. Send me a brief message about your current GoHighLevel or tracking bottleneck, and let's see if we are a fit to build a system that scales.

I help scaling e-commerce brands, agencies, and service operators build governed, multi-agent AI systems and automated backend pipelines that eliminate manual work, stop dropped handoffs, and drive measurable revenue growth. With 5+ years of production experience, I design deterministic API integrations, custom microservices, and AI workflows using n8n, Make, Zapier, and Python/Node.js. What I Architect & Build 1. Multi-Agent AI Systems & RAG Architectures LLM Engine Integration: Claude 3.5, OpenAI (GPT-4o), Gemini, DeepSeek, and Hugging Face. Voice & Chat Agents: High-reliability inbound/outbound agents built with VAPI, ElevenLabs, Twilio, RingCentral, and Botpress, backed by human handover queues and audit logs. Agent Infrastructure: FastAPI, Docker, Redis/BullMQ queues, Vercel, Supabase, and DigitalOcean/Contabo. 2. E-Commerce & Warehouse Operations Platforms & ERPs: Shopify, Linnworks, Peoplevox, NetSuite, BigCommerce, Magento, TikTok Shop, Shopee, and Lazada. Logistics & Shipping: FedEx, DHL, ShipStation, AfterShip, and custom image transfer systems. Customer Service Automation: Gorgias, Zendesk, and Trustpilot integrated with CRM and inventory systems for automated first-contact resolution. 3. CRM, Sales & Lead Generation Engines CRM Ecosystems: Salesforce, GoHighLevel (GHL), HubSpot, Mondaydotcom, Zoho, ClickUp, Airtable, CATS CRM, and Bitrix24. Outbound & Data Scraping: Clay, Instantly, HeyReach, Rb2b, Signalbase, Firecrawl, ScraperAPI, Apify, Puppeteer, Playwright, Selenium, and Serper.dev. Comms & Booking: Dialpad, Twilio, MessagingApps API, Slack, Calendly, and SimplyBook.me. 4. Full-Stack Web, AI Media & Data Workflows Frontend & Web Development: React, Next.js, Webflow, WordPress, Lovable, Figma, HTML/CSS/JS, and custom portals. AI Content Generation: VEO, Sora, Fal.ai, Vizard AI, Gamma, Canva, and custom automated social posting (Buffer/Metricool). Payments & Billing: Stripe, PayFast, and automated invoicing pipelines. Engineering Principles & Reliability Deterministic Writes: LLMs handle reasoning and drafting; deterministic code manages booking, money, and CRM database updates. State Management: Idempotent keys, object locks, and single-writer records prevent duplicate operations and race conditions. Failure Recovery: Explicit workflow states and outbox patterns allow step-level resumption rather than full job retries. Human-in-the-Loop: Maker/checker models enforce human review on high-risk actions, price updates, and customer-facing messaging. Ready to Scale Your Operations? Whether you need to unify Shopify, Salesforce, and Dialpad, automate complex Linnworks/Peoplevox warehouse pipelines, or deploy custom n8n multi-agent networks, let’s connect. Send me a message to review your current architecture and mapping.