- Reverse engineering
- Low-level programming
- Technical writing
- Electronics and embedded systems
- Python package to extract text from HTML pages (built from scratch).
- Golang module to scrap web pages asynchonously with pipelines (built from scratch).
- Pure C implementation of towers of hanoi game with object-oriented programming.
- Proraf Consumidor low-code mobile app, database, and microservices. (Patent BR 51 2025 000745 0).
- Proraf's website with Bulma and Jekyll.
- Executable file import address table patching tool with C++.
- Lua library in Assembly to calculate CRC32 with SSE42 support.
- Command-line barcode generator in pure C (built from scratch).
- Parser-free IF framework in TypeScript (built from scratch).
- LuaLaTeX template for institutional reports.
- A firewall settings helper chatbot (before LLMs) with three interfaces and RESTful API in Python and Docker, using: Spacy, Rita DSL, Flask, Gunicorn, RabbitMQ. (Patent BR 51 2023 001338 2).