Jonathan Freire
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Featured Applications

Actual platforms and products I've built for free for the world.
Piano Skill Boost
Deployed Product

Piano Skill Boost

An interactive web application helping users learn and practice playing chords and notes on a piano. Built with NextJS and Supabase has been my main project for the last 6 months. Soon I will be adding cutting edge real-time audio processing and chord recognition directly in your browser.

NextJS
TypeScript
Supabase
Material UI
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Sweet Life
Work In Progress

Sweet Life

A personal life automation center — built for myself, open to the world. Sweet Life uses AI to capture and categorize your thoughts before they slip away, automatically prioritizes your day so you always know what matters most, and surfaces only what's relevant in your inbox. The goal: spend less time managing life and more time living it. Work in progress — contributors welcome.

NextJS
TypeScript
Claude AI
Langgraph
PostgreSQL
Supabase
In Development - Join Project

A few webs designed by me

Showcasing various website designs, layouts, and interactive platforms I've crafted over the years.

Ciencia Prisma

Ciencia Prisma

Web application designed for managing and publishing academic papers.

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Soluciones Academicas RV

Soluciones Academicas RV

[NO LONGER ONLINE] Web application developed to manage academic solutions and resources.

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Incocalza

Incocalza

System to handle my father's business. It consists of a system to manage the inventory of shoes with advanced AI features and a web page to show the shoes to the world.

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Other Projects & Open Source

A collection of minor tools, libraries, and experimental repositories.

Adaboosting Machine-Learning

One of my first ML implementations. Adaboosting raw implementation to improve the performance of weak classifiers.

PythonNumpyPandas

Rasa Training Base Template

A template to train Rasa NLU models with custom data. No LLMs, just a base to start building your own Rasa projects.

PythonRasaYAML

Rasa facilities

This project is about a bot that returns the location of facilities provided by the user

PythonRasaYAML

Last Articles

Insights, tutorials, and thoughts on software development and AI.