Umer F.

I build AI voice agents and AI automation systems that answer calls, qualify leads, book appointments and update your CRM automatically, using Vapi, Retell AI, Twilio, ElevenLabs, n8n and Make. I'm also a full-stack Python developer (Django, Flask, FastAPI, React), so I build the parts no-code tools can't reach: custom MCP servers, Claude and ChatGPT connectors, backend services, webhooks and API integrations. One engineer, A to Z, from the phone call to the database. AI VOICE AGENTS (Vapi, Retell AI, Twilio, ElevenLabs) • Inbound AI receptionist: answers every call 24/7, handles FAQs, routes and transfers to a human • Outbound AI calling agent: lead follow-up, lead qualification, reminders, reactivation campaigns • Appointment booking and rescheduling with Google Calendar, Calendly and Cal .com • Call transfer, human handoff, voicemail detection and after-hours handling • Post-call automation: transcripts, call summaries, CRM updates, SMS and email follow-up • Fixing existing voice agents: latency, talking over callers, wrong bookings, prompt tuning MCP SERVERS, CLAUDE CODE & CHATGPT CONNECTORS • Custom MCP servers (Model Context Protocol) that connect Claude, ChatGPT and Cursor to your database, CRM and internal APIs • Claude connectors and ChatGPT apps/connectors with remote MCP and OAuth • Claude Code setup, custom agents, skills and AI-assisted development workflows • OpenAI API and Anthropic API integration: function calling, tool use, structured outputs AI WORKFLOW AUTOMATION (n8n, Make .com, Zapier) • Lead capture, enrichment, CRM entry and automated follow-up • AI agents inside n8n and Make: classify, extract, summarize, draft and route data • Self-hosted n8n on Docker with error handling, retries and logging so nothing fails silently • Webhook and REST API integrations for tools that have no native connector • Broken workflow fixes and optimization for existing n8n, Make and Zapier setups AI AGENTS & CHATBOTS • RAG chatbots trained on your documents, website and knowledge base • WhatsApp, website and Slack AI chatbots connected to your CRM and calendar • AI email agents that read, categorize, draft replies and route to the right person • Multi-step AI agents with OpenAI GPT, Claude and Gemini FULL-STACK & BACKEND Python, Django, Flask, FastAPI, React, PostgreSQL, Supabase, Docker. Dashboards, admin panels, call analytics and the product around your AI, not just the AI itself. [RECENT WORK: add 2 to 4 lines here once you have them, e.g. "Retell AI receptionist for a dental clinic: answers inbound calls, books into Google Calendar, logs every call to Airtable."] INDUSTRIES Real estate, healthcare and dental clinics, home services (HVAC, plumbing, roofing), law firms, insurance, marketing agencies, e-commerce and SaaS. HOW I WORK 1. I map your current call flow or process and find where leads and time are being lost 2. You get a working demo early, so you hear real calls before the full build 3. I test real edge cases: interruptions, background noise, failed API calls, double bookings 4. Full handover with documentation. You own every account, prompt, workflow and line of code TECH STACK Voice AI: Vapi, Retell AI, Twilio, ElevenLabs, Deepgram, OpenAI Realtime API AI & LLMs: OpenAI, ChatGPT, GPT, Claude, Anthropic API, Gemini, MCP, Claude Code Automation: n8n, Make, Zapier, Airtable, Google Sheets, Notion CRM: GoHighLevel, HubSpot, Pipedrive Backend: Python, Django, Flask, FastAPI, Node.js, REST APIs, Webhooks Data: PostgreSQL, Supabase, Pinecone, vector databases Frontend & DevOps: React, Docker, AWS LET'S TALK Send me the calls or tasks you want automated and the tools you already use. I'll reply with a clear build plan, timeline and fixed price. If I'm not the right fit, I'll tell you. Keywords: AI voice agent developer, AI receptionist, AI phone agent, AI calling agent, conversational AI, voice AI, Vapi expert, Retell AI developer, Twilio developer, ElevenLabs, n8n expert, Make expert, Zapier, AI automation expert, workflow automation, MCP server developer, Model Context Protocol, Claude developer, Claude Code, ChatGPT connector, ChatGPT apps, OpenAI API, AI agent developer, AI chatbot, RAG chatbot, CRM automation, API integration, Python developer