Ignacio Freiberg, Software Developer in Buenos Aires, Argentina
Ignacio Freiberg

Software Developer in Buenos Aires, Argentina

Member since June 28, 2012
Ignacio is a software and web developer with more than twelve years of experience in many programming languages, libraries, and frameworks (both frontend and backend). He enjoys constantly learning and developing new skills, and he is familiar with many different paradigms and technologies.
Ignacio is now available for hire




Buenos Aires, Argentina



Preferred Environment

Mac, Linux

The most amazing...

...thing I've built is a Node.js app to allow for the sending and receiving of millions of multiple choice questions and responses via SMS.


  • Frontend Developer

    2015 - 2016
    • Implemented UI/UX designs, including user interactions, animations, cross-browser compatibility.
    • Implemented the connection to the backend REST API using the Restangular library.
    • Created a new project structure for new sub-projects within the company, implementing best practices for organized and scalable Angular projects.
    Technologies: AngularJS
  • Web Developer

    2011 - 2015
    GoChime (via Toptal)
    • Built prototype system with heavy integration with Twitter API and automatic querying and posting based on what twitter users were sharing in real-time.
    • Designed and built reporting systems for actionable data analysis and client reports.
    Technologies: Node.js, JavaScript, PHP
  • Lead Developer

    2012 - 2012
    AdWorx (via Toptal)
    • Designed and built a system using CodeIgniter (PHP) implementing the entire business flow (product selection, payment, production, delivery).
    • Contributed to the definition of the business logic process.
    • Implemented the front-end UI/UX using HTML5, Compass, CoffeeScript and jQuery.
    • Implemented payments using Paypal Pro (multiple recurring payments, credit card direct payments).
    • Integrated with a brochure design and printing service (mycreativeshop.com).
    Technologies: Amazon Web Services (AWS), Jenkins, Phing, CoffeeScript, Sass, Compass, CSS3, HTML5, PHPDoc, PHPUnit, CodeIgniter, MySQL, PHP
  • Lead Developer

    2010 - 2012
    SmsPREP (via Toptal)
    • Developed Joomla components to allow for the sending and receiving of millions of multiple choice questions and responses via SMS.
    • Designed and built a smart learning management system (LMS) from scratch.
    • Designed and built an adaptive learning algorithm that continually targets multiple-choice questions according to a current user's difficulty level.
    • Designed multiple reporting systems for actionable data analysis and business intelligence.
    • Developed smsPREP API to allow for 3rd party integration into the system for sites such as Zinch.com and CollegeProwler.com.
    • Designed and built social gaming and social modes for e-learning.
    • Developed Facebook integrations for social learning.
    • Developed and integrated a Kannel SMS Gateway.
    Technologies: Node.js, CSS, HTML, JavaScript, Joomla, PHP
  • Web Developer

    2011 - 2011
    Circlefy (via Toptal)
    • Developed the prototype of the social network working under the “Scrum” model.
    • Managed the R&D team as “Scrum Master” (defining requirements, PM, etc.).
    Technologies: JavaScript, PHP
  • Project Manager

    2011 - 2011
    Toptal Platform
    • Defined requirements and managed a team of Ruby on Rails developers.
    • Conducted QA/Testing.
    Technologies: Ruby on Rails (RoR)
  • Front-end Developer

    2011 - 2011
    IDEO (via Toptal)
    • Created prototype websites for market testing.
    • Set up Google Analytics and Goal Tracking to measure their success.
    • Contributed to the UI / UX design process based on knowledge of usability best practices from Steve Krug of http://www.sensible.com/.
    • Implemented many variations of User Experience using jQuery and Youtube Custom Player.
    • Developed basic Flash functions in ActionScript 3.0.
    Technologies: ActionScript 3, Flash, jQuery, CSS3, HTML5
  • Developer

    2010 - 2010
    ConsumerBell (via Toptal)
    • Created a WordPress plugin that allowed clients to post comments about any company, service or product.
    • The plugin included a “feed” to show the posted comments in real time.
    • This plugin also had a back-end integrated with WordPress administration panel.
    • Implemented Facebook and Twitter integration.
    • Developed different UI/UX elements using jQuery.
    Technologies: JavaScript, CSS, HTML, WordPress, PHP
  • Developer

    2009 - 2010
    DWP Internet
    • Developed Joomla components and themes.
    • Developed a generic “directory site” and then customized/deployed it to create 3 websites.
    • Optimized the Mosets Tree component code, increasing site performance by ~200%.
    • Created a web-crawler from scratch using C++/Python.
    • Converted many gigabytes of data into importable SQL, only using a couple regular expressions.
    • Executed full data mining processes, downloading, parsing, and importing over a 400.000 records for 3 databases.
    Technologies: JavaScript, CSS, HTML, Joomla, PHP


  • GoChime (Development)

    Social marketing automation platform (node.js)

  • Toptal Mentor
    Ignacio is a mentor in the Toptal Global Mentor’s Program. This program is a partnership between Toptal and General Assembly to provide high quality mentorship for students from minority and low income backgrounds who are looking to begin their careers as professional software engineers. Ignacio shows commitment to diversity in tech by mentoring a General Assembly student every week for a year, covering everything from coding tips and tricks to advice on making it in the industry.


  • Languages

    JavaScript, Sass, CSS3, HTML5, Bash, PHP, CoffeeScript, C++, Visual Basic .NET (VB.NET), ActionScript 3, HTML, CSS, C, C#
  • Frameworks

    AngularJS, Bootstrap, Express.js, UI-Router, CodeIgniter, PHPUnit, Compass, Ruby on Rails (RoR)
  • Libraries/APIs

    Node.js, GridFS, OpenCV, Facebook Ads API, Stripe, Backbone.js, Facebook API, jQuery, Underscore.js, API Development, Backbone.Marionette, Twitter API, OpenGL, PayPal API, React, Marionette.js
  • Tools

    Adobe Photoshop, Grunt, Gulp.js, Mongoose, Git, Vim Text Editor, RabbitMQ, Mocha, Subversion (SVN), Phing, Jenkins, Flash
  • Paradigms

    Agile Software Development, Test-driven Development (TDD), UX Design, Object-oriented Programming (OOP), User Testing, Behavior-driven Development (BDD), Event-driven Programming
  • Platforms

    MacOS, Linux, Google Sites, LAMP, Amazon Web Services (AWS), Joomla, WordPress
  • Storage

    MySQL, MongoDB, PostgreSQL, Redis
  • Industry Expertise

  • Other

    DevOps Engineer, Computer Vision, Data Mining, Data Analysis, Data Visualization, Brain-computer Interface, Learning Management Systems (LMS), APIs, Facebook Ads, Front-end Development, Natural Language Processing (NLP), Digital Signal Processing, PHPDoc


  • Bachelor degree in Computer Science
    2007 - 2015
    University of Buenos Aires - Buenos Aires

To view more profiles

Join Toptal
Share it with others