Hi, I’m Gustavo Leon. You may remember me from such amazing projects as gmaps, CodePicnic or Runa.

I’m a full-stack web developer with experience in JavaScript and Ruby. I have 10 years of experience working with projects in different industries, from digital campaigns to HR, e-commerce and SaaS products.


I worked in some amazing companies building incredible products, and even created one of my own!


Head of Engineering (Oct 2017 - Feb 2019)

Frontend dev (Jul 2017 - Oct 2017)


CTO (Nov 2014 - Jun 2017)

Fullstack Developer (Nov 2014 - Jun 2017)


Fullstack Developer (Mar 2011 - Nov 2014)

JavaScript Instructor (Jan 2013 - Dec 2013 | Apr 2014 - Aug 2014)

Presentations (in Spanish)

I did some presentations about my experience, some experiments I did and other stuff I wanted to share with the community.

Usando Preact, una alternativa ligera a React

How to use Ruby to run shell commands directly on Docker containers.

Manejando Docker containers con Ruby y backticks

How to use Ruby to run shell commands directly on Docker containers.

CodePicnic: Lecciones aprendidas al crear una startup tecnológica

17 lessons learned in 2 years of work.

Universal Web apps con JavaScript

Using JavaScript in both back and front. Repository

gmaps.js - 4 lecciones open source en 4 pasos

What I learned building an open source project.

Other projects

In my spare time I did other projects that helped the community in one way or another.

gmaps.js (Stalled)

Open source project. jQuery-like wrapper to use Google Maps JavaScript API in an easier way.


JavaScript e-book in Spanish. E-book about JavaScript for beginners oriented to frontend development.