WhatsApp Bots for Business: Complete Guide
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Hi, I'm Kenneth Melchor
Senior
Fullstack
Developer
20+ years building web platforms, AI agents, and automation systems for businesses across 12 countries.
WORK WITH MEWORK WITH ME
Full Stack Development
Next.js, React, Node.js — multilingual platforms built for performance and scale.
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AI Agents & Bots
WhatsApp bots, AI receptionists, and custom automation that work 24/7 for your business.
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SEO & AI Visibility
Get found on Google AND recommended by ChatGPT with our hybrid GEO + SEO approach.
VIEW DETAILSVIEW DETAILS“I don't build prototypes. I build production systems that work while you sleep.”
My Journey
2004
Started Building for the Web
First websites, first clients. PHP, MySQL, JavaScript. The era of table layouts and IE6.
2008
Full-Stack & International Projects
Enterprise projects across Europe. Multilingual platforms, e-commerce. English, Spanish, Serbian.
2012
SEO & Performance Specialist
Technical SEO, Core Web Vitals, conversion optimisation. Clients across Spain, UK, Germany.
2018
Founded Kaufast
Formalised the consultancy in Barcelona. Senior-only team, no juniors, no handoffs.
2023
AI & Automation Pivot
AI agents, WhatsApp bots, OpenAI integration, custom automation pipelines.
2025
AI Solutions Consultancy
Full pivot to AI-first. 12 languages, 12 countries, production-grade systems.
Latest Projects
Full-StackReal EstateMultilingual
InmobiMobi
VISIT SITEVISIT SITEMultilingual real estate portal serving the Spanish and international market. Property search with advanced filtering, listing management for agents, lead capture system, and SEO-optimised pages in multiple languages.
Built with
React
Node.js
PostgreSQL
AWS
Python
Docker
ReactNode.jsPostgreSQLAWSPythonDockerNext.jsAI Solutions12 Languages
Kaufast.com
VISIT SITEVISIT SITEAI solutions consultancy website rebuilt from the ground up with Next.js 14. Serves 12 countries in 12 languages with automatic locale detection. Features AI visibility testing tools, conversational project qualifier, and structured data for AI search engines.
Built with
Next.jsReact
TypeScriptNode.js
Vercel
OpenAI
Next.jsReactTypeScriptNode.jsVercelOpenAITestimonials
“Kaufast built us a WhatsApp bot that answers in seconds — bookings went up 35% in the first month.”
Nuria S.
Restaurant Owner, Barcelona“They built our entire booking platform in 6 weeks. Multilingual, mobile-first, connected to our CRM.”
Laura G.
Operations Manager, Real EstateTech Stack
Next.jsReactTypeScriptNode.jsPythonAWS
Google CloudPostgreSQL
Supabase
Tailwind CSSDockerVercelOpenAI
PyTorch
Cloudflare
MongoDB
Let's Build Something
Got a project in mind? I take on 3-4 projects per month. Book a free 30-minute call or message me directly.