Miller Medeiros
Senior Principal Front-End Engineer at Upgrade, Inc.
Minas Gerais, Brazil
Summary
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Rockstar🎓
Top SchoolMiller Medeiros is a Senior Principal Front-End Engineer with 16 years of experience blending design sensibility and deep JavaScript expertise to build scalable, user-focused web and mobile interfaces. After transitioning from a design-first background to leading front-end engineering, he has driven component libraries and developer tooling at companies like Facebook and Upgrade, while contributing significant fixes and features to widely used open-source projects such as RequireJS plugins, esformatter, and accounting.js. He combines hands-on work (core UI React components, codemods, build optimizations) with automation and QA experience from projects like Mozilla’s Gaia, making him strong at both product-facing UI and developer experience improvements. Based in Minas Gerais, Brazil, he’s an active open-source maintainer known for practical refactors, performance-minded utilities, and migrating projects across AMD/Node/browser environments—skills that help teams modernize codebases without breaking users.
16 years of coding experience
15 years of employment as a software developer
Bachelor Graphic Design, Bachelor Graphic Design at Universidade do Estado de Minas GeraisTechnician Business Management, Technician Business Management at Escola Técnica de Formação Gerencial / SEBRAE
Portuguese, English, Spanish
Stackoverflow
1,256reputation
3.6mreached
20answers
0questions
javascript
top-5%
requirejs
top-5%
Github Skills (48)
astm10
unit-testing10
uitest10
debug10
javascript10
aster10
strings10
animation10
marionette10
handlebars10
data-manipulation10
text-manipulation10
plugin-development10
typescript10
eslint10
Programming languages (8)
Github contributions (5)
millermedeiros/esformatter
Nov 2012 - Jun 2017
ECMAScript code beautifier/formatter
Role in this project:
Front-end Developer
Front-end DeveloperContributions:471 commits, 49 PRs, 190 pushes in 4 years 7 months
Contributions summary:Miller primarily contributed to improving the ECMAScript code beautifier/formatter. Their commits involved modifying the code to enhance its functionality, particularly focusing on improving indenting and code formatting. They also worked on migrating the code to use a new AST walker for more efficient and flexible code manipulation. Furthermore, the changes indicate an evolution of the formatting process to manipulate tokens instead of rewriting the code.
beautifierjavascriptformattertypescriptecmascript
millermedeiros/requirejs-plugins
Oct 2011 - Feb 2015
RequireJS Plugins
Role in this project:Front-end Developer
Front-end DeveloperContributions:46 commits, 1 PR, 2 pushes in 3 years 4 months
Contributions summary:Miller primarily contributed to the `requirejs-plugins` repository by developing and refining plugins for RequireJS. They refactored and updated the `image` plugin for image caching and the `noext` plugin. The user also implemented a `goog!` plugin, and a `font` plugin, adding examples and fixing existing plugins.
requirejsjavascriptpluginsplugin
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