Leonardo Maldonado

software engineer


I build apps.

I'm Leo, a passionate creator living in Franca, Brazil. I have years of experience with JavaScript, React, Node.js, TypeScript, GraphQL, MongoDB, PostgreSQL, Tailwind, etc. I write monthly articles related to various technologies.


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33 JavaScript Concepts

33 JavaScript concepts every developer should know.

A project created with the intention of helping developers master their concepts in JavaScript. An open-source project that GitHub considered one of the top projects of 2018.

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Track your bets, win more money.

A bettings management app that helps you track your bets and win more money. It has a lot of features like a dashboard, statistics, targets, history, etc.