Marcelo Henrique Malagueta marceloohenr

👨‍💻 About Me

const marcelo = {
    name: "Marcelo Henrique",
    role: "Fullstack Developer",
    education: "Computer Science",
    location: "Brazil 🇧🇷",

    languages: [
        "JavaScript",
        "TypeScript",
        "PHP",
        "Java",
        "Python",
        "C"
    ],

    frontend: [
        "HTML5",
        "CSS3",
        "JavaScript",
        "TypeScript",
        "React"
    ],

    backend: [
        "Node.js",
        "PHP",
        "Java",
        "Python",
        "REST APIs"
    ],

    databases: [
        "PostgreSQL",
        "MySQL",
        "SQL"
    ],

    infrastructure: [
        "Docker",
        "Linux",
        "Git",
        "GitHub"
    ],

    experience: [
        "Fullstack Web Applications",
        "REST APIs",
        "Authentication & Authorization",
        "Database Integration",
        "Administrative Dashboards",
        "CRUD Systems",
        "Business Rules",
        "System Integrations",
        "Dockerized Applications",
        "Deployment"
    ],

    studying: [
        "Information Security",
        "Cybersecurity",
        "Application Security",
        "Secure Development"
    ],

    focus: "Building scalable, secure and maintainable software 🚀"
};

I'm a Fullstack Developer and Computer Science student focused on developing complete software solutions, working across the entire application lifecycle — from the user interface to backend services, databases, infrastructure and deployment.

I work with JavaScript, TypeScript, React, Node.js, PHP, Java, Python, SQL, Docker and Linux, building applications involving APIs, authentication, authorization, dashboards, integrations, business rules and data persistence.

My practical development experience includes fullstack applications, REST APIs, administrative platforms, CRUD systems, authentication flows, role-based permissions, database integrations, responsive interfaces and deployment.

I enjoy understanding the architecture behind a product instead of working only on an isolated layer.

Frontend → Backend → API → Database → Infrastructure → Deploy

Alongside software development, I'm expanding my knowledge in Information Security and Cybersecurity, with a focus on application security and secure software development.

🛠️ Tech Stack

🌐 Frontend

⚙️ Backend & Programming

🗄️ Databases

🐳 DevOps & Infrastructure

🔧 Tools

⚡ Main Technologies

💻 Developer Terminal

┌──(marcelo㉿github)-[~]
└─$ whoami

Marcelo Henrique
Fullstack Developer
Computer Science Student


┌──(marcelo㉿github)-[~]
└─$ cat stack.txt

Frontend:
→ HTML
→ CSS
→ JavaScript
→ TypeScript
→ React

Backend:
→ Node.js
→ PHP
→ Java
→ Python

Database:
→ PostgreSQL
→ MySQL

Infrastructure:
→ Docker
→ Linux

Tools:
→ Git
→ GitHub


┌──(marcelo㉿github)-[~]
└─$ cat what-i-build.txt

Fullstack Web Applications
REST APIs
Authentication Systems
Role-Based Access Control
Administrative Dashboards
Database-driven Systems
System Integrations
CRUD Applications
Dockerized Applications


┌──(marcelo㉿github)-[~]
└─$ cat currently-studying.txt

Information Security
Cybersecurity
Application Security
Secure Software Development


┌──(marcelo㉿github)-[~]
└─$ ./developer-status

Building   ████████████████████ 100%
Coding     ████████████████████ 100%
Debugging  ████████████████████ 100%
Learning   ████████████████████ ∞

Status: ONLINE 🚀

🚀 Development Experience

I work across multiple layers of software development, from frontend implementation to backend logic, databases and production deployment.

Frontend Development

Responsive web applications
Modern user interfaces
React applications
JavaScript & TypeScript
Component-based architecture
Form validation
API consumption
State and data flow
Responsive design

Backend Development

Backend services
REST APIs
Node.js
PHP
Java
Python
Business rules
Data validation
API integrations
Error handling

Authentication & Authorization

Login flows
Authentication systems
Session management
Protected routes
Role-based access control
Permission validation
User access management

Databases

PostgreSQL
MySQL
Relational database modeling
SQL queries
CRUD operations
Data persistence
Application/database integration

Infrastructure & Deployment

Docker
Containerized applications
Linux environments
Environment configuration
Git workflows
GitHub repositories
Application deployment
Production maintenance

🧠 How I Build Software

           IDEA
             │
             ▼
        REQUIREMENTS
             │
             ▼
        UI / FRONTEND
             │
             ▼
          BACKEND
             │
             ▼
          REST API
             │
             ▼
         DATABASE
             │
             ▼
       AUTHENTICATION
             │
             ▼
       BUSINESS RULES
             │
             ▼
           TESTS
             │
             ▼
          DOCKER
             │
             ▼
          DEPLOY
             │
             ▼
        MAINTENANCE

🔌 APIs & Integrations

I work with application communication and integrations using REST APIs.

GET    /api/resources
POST   /api/resources
PUT    /api/resources/:id
PATCH  /api/resources/:id
DELETE /api/resources/:id

Experience includes:

REST architecture
JSON
HTTP methods
Request/response handling
Authentication
Authorization
Input validation
Error handling
External API integrations
Frontend/backend communication
Database persistence

🔐 Authentication & Access Control

USER
 │
 ▼
LOGIN
 │
 ▼
AUTHENTICATION
 │
 ▼
SESSION / TOKEN
 │
 ▼
ROLE
 │
 ├── ADMIN
 │
 ├── USER
 │
 └── CLIENT
 │
 ▼
PERMISSION VALIDATION
 │
 ▼
PROTECTED RESOURCE

I work with authentication and authorization flows where access control is enforced according to user identity, roles and permissions.

🐳 Docker & Infrastructure

application:
  frontend:
    - React
    - TypeScript

  backend:
    - Node.js
    - PHP
    - Java
    - Python

  database:
    - PostgreSQL
    - MySQL

  infrastructure:
    - Docker
    - Linux

  workflow:
    - Git
    - GitHub

  deployment:
    status: production-ready

🛡️ Cybersecurity Studies

Information Security is an area I'm actively studying alongside my work in software development.

My current studies include:

Information Security fundamentals
Cybersecurity fundamentals
Web Application Security
Application Security
API Security
Authentication Security
Authorization & Access Control
Secure Coding Practices
Linux Security
Common Web Vulnerabilities
OWASP concepts
Secure Software Development

┌──(marcelo㉿security)-[~]
└─$ cat security-focus.txt

Application Security
Web Security
API Security
Authentication Security
Secure Coding
OWASP
Linux Security

My objective is to combine:

Software Development
        +
Information Security
        ↓
Better & Safer Software

🚀 Featured Development Areas

🌐 Fullstack Applications

⚛️ React Interfaces

⚙️ Backend Services

🔌 REST APIs

🔐 Authentication & Authorization

👥 Role-Based Access Control

📊 Administrative Dashboards

🗄️ PostgreSQL & MySQL

🔄 System Integrations

🐳 Docker

🐧 Linux

🚀 Deployments

🏗️ Application Architecture

┌─────────────────────────────────────────────────┐
│                   CLIENT                        │
│                                                 │
│          React / TypeScript / JavaScript        │
└───────────────────────┬─────────────────────────┘
                        │
                        │ HTTPS / REST
                        ▼
┌─────────────────────────────────────────────────┐
│                    API                          │
│                                                 │
│       Node.js / PHP / Java / Python             │
│                                                 │
│       Authentication + Business Logic           │
└───────────────────────┬─────────────────────────┘
                        │
                        ▼
┌─────────────────────────────────────────────────┐
│                  DATABASE                       │
│                                                 │
│            PostgreSQL / MySQL                   │
└───────────────────────┬─────────────────────────┘
                        │
                        ▼
┌─────────────────────────────────────────────────┐
│               INFRASTRUCTURE                    │
│                                                 │
│               Docker / Linux                    │
└─────────────────────────────────────────────────┘

📊 GitHub Analytics

🔥 GitHub Streak

📈 Contribution Activity

🐍 Contribution Snake

🎯 Current Focus

developer:
  role: Fullstack Developer

  frontend:
    - JavaScript
    - TypeScript
    - React

  backend:
    - Node.js
    - PHP
    - Java
    - Python

  database:
    - PostgreSQL
    - MySQL

  devops:
    - Docker
    - Linux

  building:
    - Fullstack Applications
    - REST APIs
    - Authentication Systems
    - Administrative Dashboards
    - Database-driven Systems
    - Integrations

  studying:
    cybersecurity:
      - Information Security
      - Application Security
      - Web Security
      - Secure Coding

💼 Professional Interests

I'm interested in working with:

💻 Fullstack Development
⚙️ Backend Development
⚛️ Frontend Development
☕ Java Development
🐍 Python Development
🐘 PHP Development
🟢 Node.js Development
🔷 TypeScript
🔌 REST APIs
🗄️ Databases
🐳 Docker
🐧 Linux
🔐 Authentication & Authorization
🏗️ Software Architecture
🔄 System Integrations
🛡️ Information Security

I enjoy projects where I can understand and contribute to the complete system instead of working only on a single isolated layer.

📫 Let's Connect

Have a project, opportunity or idea? Let's talk.

"Building complete solutions from frontend to deploy."

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