👋 Hi, I'm Mateus!

I am a Full Stack Developer specializing in Spring Boot Java and modern web technologies, with a unique background combining Computer Science and PhD-level research in Entomology. With 1,760+ hours of documented development experience, I build production-ready applications using Java 21, Spring Boot 3.5.3, React, TypeScript, and PostgreSQL.

Currently focused on backend development with Spring Boot, creating scalable REST APIs with clean architecture, JPA/Hibernate, and microservices patterns. I also develop full-stack solutions combining React/Next.js frontends with Node.js/Spring Boot backends, all deployed to production environments.

My unique scientific background brings analytical precision and problem-solving skills to software development, with a strong foundation in research methodology.

Core Expertise: Spring Boot • Java • React • TypeScript • PostgreSQL • Node.js • Docker • CI/CD

Let's connect! 🚀

• Production-ready REST API with Spring Boot 3.5.3 and Java 21. Features complete e-commerce domain model, JPA/Hibernate relationships, PostgreSQL integration, and live deployment on Render.

• Full-stack church management system with React, TypeScript, Node.js, and PostgreSQL. Implements event management, donation tracking, user authentication, and role-based access control.

• Document management system with React, TypeScript, Node.js, and Supabase. Features real-time updates with Socket.io, workflow tracking, metadata management, and professional logging.

• Multi-platform medical appointment system with React web app, React Native mobile app, and Node.js API. Deployed across Vercel and Render with SQLite database.

• Data science projects exploring facial recognition, transfer learning, and image recommendation systems using Python, scikit-learn, OpenCV, and Jupyter notebooks.

• Cross-platform desktop calculator with modern UI built using C++ and Qt framework. Demonstrates proficiency in desktop application development and object-oriented design patterns.

• Java • Spring Boot 3.5+ • Spring Data JPA • Maven
• Node.js • Express.js • JWT Authentication
• PostgreSQL • MySQL • SQLite

• React • TypeScript • Next.js • Tailwind CSS
• React Native • Expo

• Docker • GitHub Actions • Vercel • Render
• Git • Postman • VS Code

• Python • Pandas • NumPy • scikit-learn

From: 16 January 2024 - To: 04 August 2025

Total Time: 1,779 hrs 17 mins

Java                 331 hrs 36 mins ███▒░░░░░░░░░░░░░░░░░░░░░   13.50 %
C++                  300 hrs 10 mins ███░░░░░░░░░░░░░░░░░░░░░░   12.22 %
JavaScript           271 hrs 1 min   ██▓░░░░░░░░░░░░░░░░░░░░░░   11.04 %
TypeScript           184 hrs 3 mins  ██░░░░░░░░░░░░░░░░░░░░░░░   07.50 %
Kotlin               100 hrs 42 mins █░░░░░░░░░░░░░░░░░░░░░░░░   04.10 %
Markdown             76 hrs 49 mins  ▓░░░░░░░░░░░░░░░░░░░░░░░░   03.13 %
CSS                  70 hrs 48 mins  ▓░░░░░░░░░░░░░░░░░░░░░░░░   02.88 %
HTML                 49 hrs 10 mins  ▓░░░░░░░░░░░░░░░░░░░░░░░░   02.00 %
JSON                 46 hrs 41 mins  ▒░░░░░░░░░░░░░░░░░░░░░░░░   01.90 %