David

Automation Infrastructure & AI Integration Engineer

Self-Employed / Freelancer • Freelance

Jun 2024 - Present • 2 yrs 5 mos

I set up and maintain the technical infrastructure behind business automation, including self-hosted n8n instances on VPS servers, secure webhook endpoints, and custom API connections between AI models and business software. I work with n8n (self-hosted), Hostinger VPS, Docker, OpenAI, the Claude API, ElevenLabs, Twilio, Telnyx, Airtable, and REST APIs. My focus is making automations reliable: structured error handling, retries, logging, and alerts so failures are caught before clients notice them. Key achievements: Deployed and configured self-hosted automation servers, giving clients full control of their data and lower running costs than hosted plans. Built AI-powered workflows that use LLMs for classification, data extraction, summarization, and conversational replies inside existing business processes. Integrated voice, messaging, and telephony APIs into single workflows for call handling and customer support. Diagnosed and repaired broken automations built by others, improving stability and reducing recurring failures.

AI Receptionist & Customer Communication Systems Developer

Self employed / Freelance • Freelance

Jan 2024 - Present • 2 yrs 10 mos

I build AI receptionists and conversational systems that answer calls and messages, qualify leads, and book appointments around the clock for service businesses such as clinics, barbershops, logistics firms, real estate agencies, and insurance brokers. Key achievements: Delivered 40+ automation and AI agent builds for clients across the US, Europe, the Middle East, and Latin America. Built voice agents on Retell AI and Vapi, connected to booking systems and CRMs through n8n and custom API integrations. Developed WhatsApp chatbots that handle customer inquiries, collect details, and hand off to staff when needed. Added multilingual support (including Spanish) so businesses can serve customers in their own language. Set up call-handling logic, transfer rules, and post-call data capture so every conversation ends up in the client’s CRM.

AI Automation & Voice Agent Specialist

Freelance • Freelance

Jan 2024 - Present • 2 yrs 10 mos

I design and implement AI-powered automation systems for businesses, including AI voice agents, AI receptionists, chatbots, workflow automation, CRM integrations, appointment booking systems, and customer support workflows. I work with tools such as Retell AI, Vapi, OpenAI, n8n, Make.com, Zapier, Twilio, Telnyx, GoHighLevel, HubSpot, Airtable, Google Sheets, WhatsApp, and Telegram. My work focuses on connecting AI tools with existing business systems so repetitive tasks such as lead qualification, appointment scheduling, follow-ups, customer support, call handling, and data management can run with less manual work.