Guillermo Paz - Principal Engineer at Mercado Libre

Guillermo Paz

Principal Engineer at Mercado Libre

Buenos Aires, Autonomous City of Buenos Aires, Argentina

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Summary

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Rockstar

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Top School

Guillermo Paz is a Principal Engineer with 15 years of front-end experience, currently leading the Frontend Web Platform at Mercado Libre to enable company-wide React and Node.js applications. He blends hands-on coding with technical leadership—reviewing code, defining best practices, shaping architecture, and scaling tooling and teams. An expert in JavaScript, HTML, CSS and web performance, he has a track record building UI frameworks and reusable libraries (including work on the Chico UI and popular modules like a touch slideout menu). Guillermo is passionate about web standards, progressive enhancement and accessibility, and still spends significant time shipping core platform features. Based in Buenos Aires, he pairs deep technical craft with mentorship and hiring to grow high-performing frontend teams.

15 years of coding experience

9 years of employment as a software developer

Designer and Web Site Manager, Designer and Web Site Manager at Escuela Da Vinci

Github Skills (5)

html10

css10

javascript10

user-interface10

front-end-development10

Programming languages (6)

TypeScriptCSSAdblock Filter ListJavaScriptHTMLPython

Github contributions (5)

frontend-rescue/keep-up-to-date

May 2013 - Apr 2022

How to keep up to date on Front-end Technologies? - The Recipe

Role in this project:

Front-end Developer

Contributions:378 commits, 10 PRs, 55 pushes in 9 years 1 month

Contributions summary:Guillermo's commits primarily focused on front-end development tasks, including the addition of CSS files, the creation of a header with stripes, and the implementation of a recipe ribbon. Further commits introduced typography styles and the styling of various sections. The user's contributions heavily involved HTML and CSS to build the user interface for the project.

keeptechnologiesrecipecssjavascript

Mango/slideout

Feb 2015 - Apr 2019

A touch slideout navigation menu for your mobile web apps.

Role in this project:

Front-end Developer

Contributions:15 releases, 165 commits, 36 PRs in 4 years 3 months

Contributions summary:Guillermo primarily contributed to the development of the slideout menu module. They implemented the core functionality, including the creation of the menu and the panel, as well as the touch events. Furthermore, the user made improvements and fixed deprecated code, and added support for touch events. They also fixed back to top functionality, and integrated events to the slideout component.

menutouch-eventssidebartouchweb-apps

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