AI Automation Engineer

Kornél Varga

I build voice agents, CRMs and the automations between them, and I ship them to production myself.

Based in Győr, Hungary, relocating to Budapest. On site or hybrid in Budapest, or remote across the EU.

4
Production apps: 880+
Commits: 57
Edge functions: 11,000+
SMS sent

About

I build AI automation and custom software for businesses, end to end: voice agents that answer and make calls, the CRM and messaging behind them, and the integrations that tie it together. I own every layer, from telephony and compliance filings to the backend and frontend.

Everything below is VargaFlow, a marketing system for home service contractors that I built and ran alone, around a full-time job. Nobody wrote the spec, and nobody else was on call when a webhook failed.

What I've built

Voice AI

AI phone receptionists

Inbound voice agents that answer as a trade business, work out what the caller needs, and book a real slot on the owner's Google Calendar.

A prompt template system: one base prompt plus trade variants, rendered and deployed to Retell by script, so a new business is a config file, not a rebuild.
Emergency triage for plumbing and HVAC, with a hard safety carve-out: a gas leak gets 911 guidance, never a booking.
Caller ID filled in through a signed inbound webhook, and every name, number and address read back to the caller before booking.

Retell AI · ElevenLabs · Twilio · Google Calendar API · Supabase

Try the demos Code

Internal platform · 288 commits

VargaFlow CRM

The CRM I ran the business on: pipelines, a two-way SMS and email inbox, automated sequences, browser calling and booking.

A cron-driven message queue that dispatches multi-step SMS and email sequences through Twilio and Resend: 11,000+ SMS sent through it since March 2026.
Replaced Calendly with my own booking system on the Google Calendar API, including self-serve reschedule and cancel.
An AI text agent on the inbound SMS line that answers leads, books calls and hands over to me when I reply.

React · TypeScript · Supabase · Twilio · Resend

Code

Client-facing product · 228 commits

Contractor app

The app contractors use: their contacts, two-way messaging, calling their customers from the browser, and post-job automation.

Browser calling on the Twilio Voice SDK, inbound and outbound, routed through the EU edge for call quality.
Review requests, a one-year referral follow-up and missed-call text-back, all scheduled through the same queue.
Multi-tenant: each contractor's data is scoped to their business, and automation endpoints check who is calling.

React · TypeScript · Supabase · Twilio Voice SDK · PWA

Code

Marketing site · 256 commits

vargaflow.com

The lead-generation site for VargaFlow, prerendered for search and built to convert.

Custom-coded, no page builder. Prerendered at build time so every service page is indexable.
Lead and onboarding forms that feed straight into the CRM's automation flows.

React · Vite · Tailwind · Vercel

Live site Code

Reusable template · 99 commits

Contractor website template

One codebase that builds a separate website per client from a config file, each deployed as its own Vercel project.

Adding a client is a config file and a deploy script, not a copy of the repo.
Branding, services, reviews and images all come from the client config.

React · Vite · Tailwind · Vercel

Live demo Code

Talk to an agent I built

Demo receptionists for fictional trade businesses, running the same system real clients get. Talk to them in your browser: interrupt, talk over them, ask something awkward.

Emergency plumbing

Answers as Ironclad Plumbing. Try a burst pipe, then try a gas smell.

Roofing estimate

Answers as Summit Roofing. Ask for a price. It won't make one up.

Every layer is mine

Most engineers own one part of a system. I own every layer of mine, so every bug in every layer was mine to find and fix. 146 commits in the history are fixes alone, and most fixes never got a commit of their own.

Telephony: Phone numbers, SIP trunks, call routing and caller ID across the US and the Netherlands.
Voice agents: Prompts, tool calls, safety rules, and testing on real phone calls, not just the dashboard.
Compliance: A2P 10DLC brand and campaign registration, consent capture, opt-outs, GDPR.
Database & security: Postgres schema, row-level security, 32 migrations, and auth on every public endpoint.
Backend: 57 edge functions: webhooks from Twilio, Retell and Google, scheduled jobs, a message queue.
Frontend: Five React apps, mobile-first, including an installable PWA.
Deploys & ops: Vercel, per-client builds, environment config, and fixing it when production breaks.

Stack

Voice: Retell AI · ElevenLabs · Prompt design · SIP trunking
Telephony: Twilio Voice · Twilio SMS · Voice SDK · A2P 10DLC
Backend: Supabase · PostgreSQL · Deno edge functions · Webhooks · Cron queues
Frontend: React · TypeScript · Vite · Tailwind
Integrations: Google Calendar API · Resend · Outscraper · Vercel
Compliance: GDPR · EU AI Act · A2P consent
Languages: Hungarian, native · English, fluent

How I work

I build with AI coding tools, heavily and on purpose. That's how one person ships all of this. What I bring is the judgement: what to build, which trade-off to take, when something is wrong, and getting it live in front of real users. I can walk you through why any of it works the way it does.