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Guillermo González, HTML Developer in Mexico City, Mexico
Guillermo González

HTML Developer in Mexico City, Mexico

Member since May 21, 2016
Guillermo is a senior developer and architect with almost 10 years of experience developing applications in a wide range of technologies and languages, including Java, JavaScript, and Python. He has great communication with clients and a lot of experience in team management with Scrum.
Guillermo is now available for hire



  • HTML, 9 years
  • jQuery, 7 years
  • Grails, 6 years
  • Apache, 6 years
  • REST, 6 years
  • GAE, 4 years
  • Python, 4 years
Mexico City, Mexico



Preferred Environment

Git, Vim, Mac OS X

The most amazing...

...thing I've coded is an implementation of a multi-vantage point tree for indexing searches of similarity between persons using Levenshtein distance.


  • Senior Django Developer

    2016 - 2017
    Consumer Affairs (via Toptal)
    • Implemented UI and UX redesign for the whole site using Jinja templates CSS and JS.
    • Implemented Optimizely monitoring and A/B test tools for improving user experience.
    • Maintained legacy code, including improving code using asynchronous tasks with Celery framework.
    Technologies: Django, Python, Celery, Webpack
  • Senior Developer

    2012 - 2015
    • Developed and maintained a multi-layer online payment platform.
    • Developed a subscriptions and recurring payments system.
    • Developed a PCI compliant system for storing credit card data and processing payments through a SOAP API.
    • Maintained a Memcached storage system for optimizing the platform.
    • Worked with a team located in three different countries.
    Technologies: GAE, GAE Datastore, Django, MySQL, Ruby on Rails
  • Architect

    2011 - 2012
    • Managed teams using Scrum methodology and Redmine for a tracking system.
    • Administered a Linux server with Apache load balancing and MySQL clusters.
    • Built a custom solution for a broad range of clients using Web 2.0 technologies and providing hosting infrastructure.
    • Developed and maintained a retail system for Walmart providers.
    • Created a REST API for mobile tactile applications at Telefonica interactive store in Mexico City.
    • Created Starbucks Digital Network, a Web 2.0 newsfeed using jQuery and Grails.
    Technologies: J2EE, Grails, PHP, Ruby on Rails, Backbone, jQuery, Linux, Apache, MySQL
  • Web Developer

    2010 - 2012
    • Created a bank's custom newspaper for internal communications using Spring MVC and jQuery.
    • Developed CSS and HTML for multiple micro sites from an image with rich graphic design.
    • Created Starbuck's landing page used by customers in stores for getting a free wifi connection.
    Technologies: Bootstrap, jQuery, JavaScript, J2EE, Tomcat, Spring
  • Senior Java Developer

    2009 - 2010
    Instituo Nacional de Migración (National Migratory Institute)
    • Maintained a migratory alerts system for monitoring flight passengers in real time.
    • Maintained the core system of migration flow.
    • Developed a public system to make online migratory procedures built in Java, Spring, and jQuery.
    • Developed an algorithm to compute person matching searches using a multi vantage point tree for indexing the searches.
    Technologies: Java, J2EE, Spring, OAS, Oracle Database
  • Junior Java Developer

    2007 - 2009
    Root Technologies
    • Developed an ERP for a gas company using Spring, Prototype, and Scriptaculous.
    • Developed an internal voting system for the acquisition of new books made in Java, JDBC, and JSP.
    Technologies: J2EE, Spring, Linux



  • Languages

    Python, HTML, JavaScript, SQL, Java, CSS, Groovy
  • Libraries/APIs

    jQuery, Flask-RESTful, Backbone.js, Underscore.js, Facebook API
  • Tools

    Git, GitHub, Maven, Apache, Subversion (SVN), Slack, Apache Ant, Apache Tomcat, Suds, RabbitMQ, Jenkins, Celery, Grunt.js
  • Paradigms

    Scrum, REST, Agile, Continuous Integration (CI), Agile Software Development
  • Other

    Ajax, Gentoo
  • Frameworks

    Django REST Framework, Flask, Spring MVC, Spring, GAE, Django, Grails, Hibernate, AngularJS, JavaServer Pages (JSP), Ruby on Rails (RoR)
  • Platforms

    Linux, Heroku, Oracle
  • Storage



  • Master's degree in Applied Mathematics
    2010 - 2012
    UNAM - Mexico City
  • Bachelor's degree in Mathematics
    2004 - 2008
    UNAM - Mexico City
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