Denis G.

I was building software before 🤖 ChatGPT made “AI expert” everyone’s favorite job title. 🚀 20+ Years in Software | 5+ Years as an AI Developer and AI Engineer (Machine Learning, NLP, RAG) ⏱️ Quotes cut from 45-60 minutes to under 5 with AI Automation on QuickBooks Online 📞 100% of calls answered 24/7/365 by an AI Voice Agent, 80-90% cheaper than a receptionist ✔️ 83 hours/month returned to a sales team with AI Agent Development, delivered in 3 weeks As an AI Developer and AI Engineer, I build production-ready AI Automation, AI agents and AI Voice Agent systems that plug into the tools your business already runs on: QuickBooks, Outlook, WhatsApp, GoHighLevel, Twilio, your CRM and your APIs. 20+ years taught me what matters: architecture, reliability, documentation and end-to-end delivery. 🔗 AI Automation & Business Systems Integration ✔️ AI Automation on QuickBooks Online (QBO) for a lab equipment distributor: AI reads quote emails and PDFs, creates the QBO estimate and syncs 2 other systems. Quotes cut from 45-60 minutes to under 5, 30+ minutes of project setup automated per deal. ✔️ Accounting & bookkeeping automation: invoice and receipt intake, document classification, QuickBooks bills and estimates, approval queues and exception flags instead of silent guesses. ✔️ Integrations: QuickBooks Online, Microsoft Outlook / Microsoft 365, WhatsApp Business / WhatsApp Cloud API, GoHighLevel (HighLevel), Twilio, Dropbox, Google Workspace, Airtable, Supabase. ✔️ Automation stack: n8n, Make, Zapier, API Integration, webhooks, CRM Automation, Automated Workflow, dashboards and reporting. 🏥 Healthcare & Telehealth Automation ✔️ HIPAA-aware automation for medical practices and telehealth: intake, follow-ups, patient messaging and workflow automation between practice systems. ✔️ Replaced the CRM and payment core of a platform running 50+ telehealth brands and a $6M rebill book. ✔️ AI Lead Generation and reactivation engine for a telehealth company with an AI Voice Agent layer: ~400 conversations/day across SMS, email and voice, GoHighLevel as the system of record, 0 added headcount. ✔️ Medical Documentation Agent with AI RAG. 💡 AI Voice Agent & Conversational AI ✔️ AI Voice Agent for a general contractor: 6 call types, live calendar booking, 0 missed calls, 80-90% cost reduction vs. a $40K-$60K/year receptionist. ✔️ AI Voice Developer work with Vapi, Retell, ElevenLabs and Twilio: AI Voice Assistant, SMS, speech-to-text, TTS, tool calling and webhooks. ✔️ AI Voice Assistant for retirement onboarding: 12x faster, 100% automated, 0 manual advisor input. ✔️ Multi-tenant platform where businesses launch their own AI Voice Agent in minutes, with 0 servers and 0 DevOps. ✔️ WhatsApp and SMS AI chatbots for customer enquiries, booking and handoff to a human. 🤖 Agentic AI, RAG & Full-Stack ✔️ Agentic AI Developer and AI Agent Builder: 1 AI agent or a multi-agent system with orchestration, authentication, audit logging and human approval. ✔️ 5+ years with the OpenAI API, Claude / Anthropic, LangChain, LangGraph, MCP, embeddings, vector databases and LLM Prompt Engineering. ✔️ RAG and AI document processing: OCR, PDFs, invoices, contracts, knowledge bases, citations back to the source document. ✔️ Full-Stack Development: Python, Node.js, JavaScript, TypeScript, React, Next.js, FastAPI, PostgreSQL, Supabase, AWS Bedrock. ✔️ AI SaaS Developer: turned 1 lawyer’s prototype into a sellable SaaS. Also Bubble, Bolt and other low-code builds with AI. 🎯 Use Cases ✔️ Home services and trades: AI receptionist, missed-call recovery, booking into Jobber, ServiceTitan, Housecall Pro or Google Calendar. ✔️ Real estate: AI agents for lead qualification, appointment setting and deal research. ✔️ Sales follow-up and customer reactivation across Outlook, SMS, email and voice. ✔️ AI marketing system for an AI agency: 1 week of 4-person campaign work done in 1 afternoon. ✔️ White-label AI Engineer for AI automation agency partners who need 1 reliable delivery team. ⚙️ How I Work ✔️ 1 clear estimate, milestone timeline, Phase 1 MVP/POC, then production deployment, GitHub source code, documentation and long-term ongoing improvements. ✔️ Backend, webhooks, retry logic, rate limits, monitoring and scalable architecture built in from day 1. Whether you need AI Automation that connects QuickBooks, Outlook and your CRM, an AI Voice Agent that answers 100% of calls, or an AI-powered SaaS built end to end, I build it from trigger to outcome. Reliable, production-ready software, not just prototypes.