Edwin Marcelo Guzman Buezo, Developer in La Paz, La Paz Department, Bolivia
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Edwin Marcelo Guzman Buezo

Verified Expert  in Engineering

Software Developer

La Paz, La Paz Department, Bolivia
Toptal Member Since
June 27, 2016

Since 2013, Edwin has been making a living as a front-end developer in the software industry. His favorite languages are JavaScript for development and C++ for algorithms. Edwin truly enjoys algorithms and working on new challenges in software development. Currently, Edwin's been focusing on React and AWS development.


Toptal Client
React, React Redux, JavaScript, Canvas 2D, Node.js, CSS, PostCSS, FlowType.JS...
Mojix & XTime
Sass, Cordova, Ext JS, JavaScript, Sencha Touch, Flux, React




Preferred Environment

Webpack, Git, Visual Studio Code (VS Code), MacOS

The most amazing...

...events in my life were The ACM ICPC World Final 2011 in Orlando, Florida and The ACM ICPC World Finals 2015 in Marrakech, Morocco.

Work Experience

Full-stack Expert Developer | React and JavaScript

2017 - 2019
Toptal Client
  • Developed a Canvas Editor using Fabric.js library, modifying and overriding methods in this library; successfully fixed problems in the repository in GitHub and added features to the framework.
  • Built multiple React components using PostCSS for the styles and multiple component libraries.
  • Worked with computational geometry algorithms to include features in the editor like alignment, max-borders limits, rotations, and clipping process.
  • Built multiple libraries and scripts to run builds and deploys for front-end libraries into npm and deploy the main app to development and production environments.
Technologies: React, React Redux, JavaScript, Canvas 2D, Node.js, CSS, PostCSS, FlowType.JS, Google Fonts, XML Parsing, Redux, Flux

Senior Software Front-end Developer

2013 - 2017
Mojix & XTime
  • Took charge of the JavaScript code that works on native iOS and web; contributed to some React features and back end with PHP.
  • Developed plugins for PhoneGap to work with iOS native.
  • Wrote unit tests and automation scripts on the project.
  • Fixed problems with memory leaks on the Sencha Touch framework.
  • Created scripts to update the JavaScript code without updating the Cordova project deployed in the iOS Apple Store.
Technologies: Sass, Cordova, Ext JS, JavaScript, Sencha Touch, Flux, React


2012 - 2012
Universidad Catolica Boliviana
  • Served as a professor at the university, teaching a course called "Introduction to Computer Science and Programming."
  • Taught C++ and programming fundamental skills for beginners.
  • Taught algorithms competition programming teams.
Technologies: C++

Software Engineer in Test

2010 - 2012
Mojix & Zebra Technologies
  • Contributed to the continuous integration for the front end and back end using Jenkins.
  • Developed test scripts (Watir-webdriver and Seleniumhq), test cases, and test plans.
  • Implemented code reviews and some unit tests to help the team of developers.
Technologies: Selenium, Java, Watir, Ruby, Manual Testing

Xtime Engage and Inspect

Made multiple applications for the web and native for mobile.

Online Ordering System

Built an online ordering system built on React and MongoDB. The app's styles were designed using CSS and Sass, and all components were created using React without any UI framework or library.

The back end was developed with Node.js and MongoDB. Also, the back end used an API built using normal JSON responses endpoints and some GraphQL endpoints for testing purposes.
2011 - 2011

Diploma in Higher Education

Universidad Católica Boliviana - La Paz, Bolivia

2005 - 2010

Bachelor's Degree in Systems Engineering

Universidad Católica Boliviana - La Paz, Bolivia


React, Node.js, FlowType.JS, D3.js, Socket.IO, React Redux, Fabric


Git, Webpack, PostCSS, Canvas 2D, Subversion (SVN), Watir, Gulp, Jenkins, MQTT, Karma, Apache Maven, Grunt, JSX


Sencha Touch, Ext JS, Redux, Flux, React Native, Serverless Framework, Selenium, Compass, Material UI, Express.js, LibGDX, Phaser.io, Bootstrap 3+, AngularJS, Angular


JavaScript, Sass, CSS, PHP, Java, C++, GraphQL, Ruby


Firebase, AWS Lambda, Visual Studio Code (VS Code), Android, iOS


JSON, Amazon S3 (AWS S3), XML Parsing, MySQL, MongoDB, Amazon DynamoDB


MVC Design, Agile Software Development, Manual Testing


Google Fonts, Cordova

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