// expertise

The tech behind the magic

With a deep understanding of the full development lifecycle, I choose the right tools for each project. From blazing-fast frontends to rock-solid backends — every technology serves a purpose.

10+

Frameworks

6+

Languages

Full

Full Stack

~/matheus/skills
$cat skills.json | jq .frontend
["React", "Angular", "Next.js", "Tailwind CSS", "TypeScript"]
$cat skills.json | jq .backend
["Node.js", "Laravel", "Python", "PostgreSQL", "REST APIs"]
$cat skills.json | jq .mobile
["React Native", "Expo", "Ionic"]
$cat skills.json | jq .ai
["OpenAI", "Gemini", "LangChain", "AI Agents"]

// tech stack

Technologies I work with

A curated set of modern technologies, frameworks, and tools that I use to build fast, reliable, and beautiful digital products.

React

Component-based UIs with hooks, context, and server components

Frontend

Next.js

Full-stack React framework with SSR, SSG, and API routes

Frontend

Angular

Enterprise-grade SPAs with TypeScript and RxJS

Frontend

TypeScript

Type-safe JavaScript for scalable applications

Frontend

Tailwind CSS

Utility-first CSS for rapid UI development

Frontend

HTML5 / CSS3

Semantic markup and modern styling techniques

Frontend

Node.js

Server-side JavaScript with Express, Fastify, and more

Backend

Laravel

PHP framework for elegant web applications

Backend

Python

Scripting, automation, data processing, and AI integration

Backend

PHP

Server-side scripting and legacy system maintenance

Backend

REST APIs

RESTful architecture design and implementation

Backend

GraphQL

Flexible query language for APIs

Backend

React Native

Cross-platform mobile apps with native performance

Mobile

Expo

Managed workflow for React Native development

Mobile

Ionic

Hybrid mobile apps with web technologies

Mobile

PostgreSQL

Advanced relational database with full ACID compliance

Database

MySQL

Reliable relational database for web applications

Database

Drizzle ORM

Type-safe SQL ORM for TypeScript projects

Database

Redis

In-memory caching and session management

Database

Docker

Containerization for consistent deployment environments

DevOps

Vercel

Serverless deployment optimized for Next.js

DevOps

Git / GitHub

Version control and collaborative development

DevOps

CI/CD

Automated testing and deployment pipelines

DevOps

OpenAI API

GPT integration for chatbots and content generation

AI / ML

Gemini

Google AI for multimodal applications

AI / ML

LangChain

Framework for building AI-powered applications

AI / ML

AI Agents

Autonomous task execution and intelligent workflows

AI / ML

// workflows

How I approach each domain

Every area of development has its own process. Here's how I tackle each one to deliver consistent, high-quality results.

Frontend Development

Building responsive, accessible, and performant user interfaces.

  • Component architecture with React / Angular
  • Styling with Tailwind CSS and design systems
  • State management and data fetching
  • Performance optimization and lazy loading
  • Responsive design and cross-browser testing

Backend Development

Designing scalable APIs and robust server-side architectures.

  • RESTful API design and documentation
  • Authentication and authorization flows
  • Database schema design and optimization
  • Input validation and error handling
  • Rate limiting and security hardening

Mobile Development

Cross-platform mobile apps with native-like experience.

  • React Native with Expo managed workflow
  • Native module integration when needed
  • Offline-first and push notifications
  • App Store and Play Store deployment
  • Performance profiling and optimization

AI Integration

Adding intelligent features that create real business value.

  • OpenAI and Gemini API integration
  • Custom chatbots and virtual assistants
  • Automated content generation pipelines
  • Data analysis and smart recommendations
  • Agent-based workflow automation

// portfolio showcase

Projects I've Delivered

Real-world projects spanning enterprise systems, AI solutions, e-commerce, and mobile apps — each one still running in production.

Homecare Management System

Enterprise

Enterprise

Healthcare operations platform

Homecare Management System

End-to-end system for homecare operations including patient internment workflows, medication tracking, financial management, and mobile support for field staff. Reduced medication loss by 98% and fully digitized manual processes.

LaravelAngularMySQLIonicBarcode APIs

Occupational Safety Platform

Enterprise

Enterprise

Regulatory compliance system (Brazil)

Occupational Safety Platform

Comprehensive SST platform with e-Social integration, employee lifecycle management, medical exams (ASO), CIPA workflows, risk programs (PGR/PCMSO), and real-time compliance dashboards. Eliminated manual reporting and ensured legal compliance.

LaravelAngularMySQLREST APISOAP/XML

LMS & Course E-commerce

E-commerce

E-commerce

Learning platform + monetization

LMS & Course E-commerce

Full learning management system with video streaming, progress tracking, certificates, and integrated e-commerce (PIX, boleto, cards). Enabled monetization of training programs and seamless integration with safety platform.

LaravelVue.jsMySQLPayment APIs

Real-time Auction Platform

Real-time

Real-time

Live bidding system

Real-time Auction Platform

Real-time auction system built for a football club event with live bidding via WebSockets, admin panel for item management, secure authentication, and post-auction payment processing.

Next.jsNode.jsWebSocketPostgreSQL

AI Customer Automation

AI / SaaS

AI / SaaS

WhatsApp & chatbot platform

AI Customer Automation

AI-powered chatbot ecosystem integrated with WhatsApp Business API. Handles customer service, lead qualification, scheduling, and sales automation using natural language understanding.

OpenAILangChainNode.jsWhatsApp API

Personal Finance AI App

AI / Fintech

AI / Fintech

Smart financial management

Personal Finance AI App

Advanced personal finance platform with investment tracking (stocks & crypto), AI-driven market analysis, automated trading strategies, and intelligent alerts for portfolio optimization.

Next.jsNode.jsAI APIsPostgreSQL

A.T.L.A.S. AI Assistant

AI

AI

Personal AI operating system

A.T.L.A.S. AI Assistant

Context-aware AI assistant connecting calendar, tasks, communication, and development workflows. Automates routines, provides real-time insights, and powers the portfolio chat experience.

Next.jsOpenAILangChainAPIs

Personal Productivity Suite

Productivity

Productivity

All-in-one organizer

Personal Productivity Suite

Comprehensive productivity platform with Kanban boards, notes, calendar sync, goal tracking, and document management — centralizing personal and professional workflows.

Next.jsReactPostgreSQL

CRM & WhatsApp Platform

SaaS

SaaS

AI-driven customer management

CRM & WhatsApp Platform

CRM platform (in development) with WhatsApp integration, visual chatbot builder, automation rules, and full client lifecycle tracking for sales and support teams.

Next.jsNode.jsOpenAIWhatsApp API

// hands-on experience

Matheus Editor

Explore my code, solve challenges, and discover easter eggs. Complete the 17 coding challenges hidden across the files!

Challenges: 0/17
matheus-portfolio — Matheus Editor
Explorer
matheus-portfolio
matheus-portfoliosrcapp.ts
1
// Matheus Barbosa — Full Stack App
2
// [Challenge] Complete the TypeScript code!
3
4
interface Developer {
5
name: string;
6
role: string;
7
skills: string[];
8
coffeePerDay: number;
9
isAwesome: 💡 TypeScript type for true/false values;
10
}
11
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const matheus: Developer = {
13
name: "Matheus Barbosa",
14
role: "Full Stack Developer",
15
skills: ["React", "Node.js", "TypeScript", "Python"],
16
coffeePerDay: Infinity,
17
isAwesome: true,
18
};
19
20
function calculateProductivity(dev: Developer): number {
21
// Physics formula: P = m × c² (productivity = motivation × coffee²)
22
const motivation = dev.skills.length * 10;
23
const coffee = dev.coffeePerDay;
24
return motivation * Math.pow(coffee, 💡 Exponent in E = mc² ... what's the power?);
25
}
26
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async function deployProject(name: string): Promise<void> {
28
console.log(`Deploying ${name}...`);
29
await new Promise(resolve => 💡 JS function to delay execution(resolve, 1000));
30
console.log(`${name} deployed successfully!`);
31
}
32
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// Let's ship it!
34
console.log(calculateProductivity(matheus)); // Infinity
35
deployProject("portfolio");
main0 errors0/17 solved
TypescriptUTF-8Spaces: 2
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// convinced yet?

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