MK
Max Keller

Full-Stack Developer · SaaS · Automation · APIs · Brazil

About

Full-Stack
Developer
& AI.

I build modern websites and web systems, from landing pages to full SaaS products. Strong in React/Next.js frontend with solid Node.js, Java and PHP backend experience.

I integrate AI into real products: chatbots, RAG, semantic search, automations and intelligent features in production. Founder of Agendaê (multi-tenant SaaS). NOC 24/7 background at Valecard. Uberlândia, Brazil.

I work with clients who need more than a template: interfaces that convert, code that scales and integrations that just work.

Years of experience0+
Certifications & courses0
Products in production0
Sources in personal RAG0

Projects

What I've built

Agendaê
2026

Multi-tenant SaaS for barbershops

Agendaê

Next.js 16React 19MySQLEvolution/BaileysDocker
Level OS
2026

Personal OS with AI

Level OS

React 19TypeScriptPHP 8MySQL
2026

Conversational flow engine

WhatsApp Automations

Evolution/BaileysNode.jsMySQLMessage Queue
2025

Personal tech context MCP server

Vault MCP

MCP ProtocolClaude CodeRAG189 sources

Tech stack

Tools & domains

Next.js 16
React 19
TypeScript
Tailwind CSS v4
Framer Motion
shadcn/ui
Radix UI
HTML / CSS
SEO Técnico
Canvas & WebGL
Mobile-first
Core Web Vitals
Next.js 16
React 19
TypeScript
Tailwind CSS v4
Framer Motion
shadcn/ui
Radix UI
HTML / CSS
SEO Técnico
Canvas & WebGL
Mobile-first
Core Web Vitals
Node.js
Java
PHP 8
Python
MySQL
PostgreSQL
Redis
Claude API
OpenAI API
Vercel AI SDK
LangChain
RAG + Qdrant
Cursor / Kiro
JWT / OAuth 2.0
Node.js
Java
PHP 8
Python
MySQL
PostgreSQL
Redis
Claude API
OpenAI API
Vercel AI SDK
LangChain
RAG + Qdrant
Cursor / Kiro
JWT / OAuth 2.0
Docker
GitHub Actions
AWS
Google Cloud
Oracle OCI
Linux / VPS
Nginx / Traefik
Grafana
Zabbix
WhatsApp Bot
n8n
COBIT 2019
Docker
GitHub Actions
AWS
Google Cloud
Oracle OCI
Linux / VPS
Nginx / Traefik
Grafana
Zabbix
WhatsApp Bot
n8n
COBIT 2019

Process

How I work

01

Discovery

I understand the business, audience and goals before writing a single line of code. One week of the right questions is worth months of rework.

02

Design & Architecture

Wireframes, data flow and technical decisions. I define the stack, integrations and database structure before coding.

03

Development

Weekly sprints with visible deliverables. Clean, typed and tested code. You track progress in real time.

04

Delivery & Support

Deploy, documentation and training. I don't disappear after delivery. I stay available for adjustments and product evolution.

Career

Professional experience

2020 – 2021

IT Support

Valecard

Technical support and ticket resolution. First contact with corporate infrastructure and Windows Server environments.

2021 – 2023

NOC Analyst

Valecard

24/7 critical infrastructure monitoring. Alerts, incidents, Zabbix/Grafana dashboards and operational automations.

2023 – 2024

Support & Development

EZ Software

Advanced technical support and internal feature development. First professional exposure to web development in a production environment.

2024

Full-Stack Developer

Pleno

Web solutions development and automations. Worked with an international team in English.

2024 – Present

Founder & Freelance Dev

Agendaê + Clients

Multi-tenant scheduling SaaS (Agendaê) in production. Serving clients on website, system and AI integration projects.

Education

Certifications

32 certifications
Alura2023

Governança de TI & COBIT 2019

Alura
Alura2025

Formação Java com OO

Alura
Alura2025

Formação Java Web: Spring Boot

Alura
Alura2024

Imersão Dev Back-End

Alura
Alura

SQL e Banco de Dados

Alura
Alura

Node.js

Alura
Alura

Python

Alura
Oracle

Oracle Database SQL

Oracle
Alura

PHP

Alura
Alura

MongoDB e NoSQL

Alura
UdemyWIP

PostgreSQL

Udemy
Udemy

APIs REST com Node.js

Udemy
Alura

JavaScript ES6+

Alura
Alura

React

Alura
Alura

TypeScript

Alura
Udemy

Next.js

Udemy
Alura

Figma, UI/UX e Prototipação

Alura
Alura2025

Imersão Front-End 2ª Edição

Alura
Alura

Engenharia de Software

Alura
Alura

Redes de Computadores

Alura
Alura

Docker

Alura
GitHub

Git & GitHub

GitHub
Zabbix

Zabbix 6 Monitoring

Zabbix
Udemy

Linux e Shell Script

Udemy
UdemyWIP

GitHub Actions & CI/CD

Udemy
Google

Google Cloud Fundamentals

Google
Oracle

Oracle Cloud Infrastructure

Oracle
Elastic

Elastic Stack (ELK)

Elastic
CourseraWIP

AWS Cloud Practitioner

Coursera
Alura

IA e Engenharia de Prompts

Alura
Meta

Meta Business Manager & WABA

Meta
Anthropic / OpenAI

Claude & OpenAI APIs

Anthropic / OpenAI
GitHub Activityloading...
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Pricing

Plans & pricing

Prices in USD · Flexible payment

Every project is unique. These are starting points — the final quote depends on scope and complexity.

Landing Page

High-converting landing page or institutional site. Delivery in 7–14 days.

Starting at
$400
  • Mobile-first responsive design
  • Animations & micro-interactions
  • On-page SEO optimized
  • Contact form integration
  • Deploy + domain configured
Most popular

Web System

Dashboard, MVP or full web system with auth, database and admin panel.

Starting at
$1,600
  • Everything in Landing Page
  • Authentication (JWT / OAuth)
  • Admin dashboard
  • Documented REST API
  • Database + backups
  • Tests and documentation

SaaS + AI

Multi-tenant SaaS with AI integrations: chatbot, RAG, automations and more.

Starting at
$5,000
  • Everything in Web System
  • Multi-tenant + plans/billing
  • AI integration (OpenAI / Claude)
  • RAG, chatbot or automations
  • Onboarding and documentation
  • Post-launch support

Not sure which plan fits? Send me a message and we'll figure it out together.

Contact

Let's build
something incredible
together.

Need a website, web system, support automation or API?

Reach out on any channel. I respond fast.

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© 2026 Max Keller · Full-Stack Developer & Automation Engineer
Let's work