Carlos Ramirez III, Front-end Developer in San Rafael, CA, United States
Carlos Ramirez III

Front-end Developer in San Rafael, CA, United States

Member since October 29, 2014
Carlos is a professional software engineer and full-stack web developer specializing in the Ruby on Rails framework. He has worked with tech companies for over a decade, helping to build technology-based businesses from the ground up. He has a bachelor's degree in computer science from Williams College.
Carlos is now available for hire




San Rafael, CA, United States



Preferred Environment

Custom cloud dev environment, Vim text editor, Git

The most amazing...

...thing I've built recently is a custom Zapier app with web hooks and a REST API to allow the integration of a new software service with hundreds of others.


  • Web Developer

    2017 - PRESENT
    BiG Media (via Toptal)
    • Designed an industry-specific workflow for signing release contracts for video production companies.
    • Created a product for creating, managing, and viewing live streaming video.
    • Built an AI-powered tool for confirming the presence of faces and other data in a video.
    Technologies: Ruby on Rails, Twitter Bootstrap, AWS
  • Web Developer

    2016 - PRESENT
    Standard International Management, LLC (via Toptal)
    • Implemented a system for creating promotional campaign landing pages from the CMS.
    • Created a careers portal for creating and publicizing open positions at the company.
    • Performance tuned the homepage from the database through the front end to increase overall loading speed.
    • Revamped the visual design of the spa section of the Miami property.
    • Performed maintenance and code refactoring to improve the quality of the codebase.
    • Implemented several landing pages for other non-hotel initiatives.
    Technologies: Ruby on Rails, PostgreSQL, Haml, RSpec, Capybara, Heroku
  • Technology and Business Consultant

    2016 - 2016
    The Capital Web, LLC (via Toptal)
    • Performed a high-level evaluation of the business and product.
    • Offered advice and guidance on which features to consider building based on the relative costs/benefits, timelines, etc.
    • Provided recommendations on useful tools and services to help achieve business and product goals.
    • Discussed startup business strategy.
    Technologies: Ruby on Rails, Heroku, Rspec, Capybara
  • Web Developer

    2015 - 2016
    Nafasi (via Toptal)
    • Completely redesigned the visual user interface using a custom Twitter Bootstrap theme.
    • Designed a LinkedIn-like profile page with in-place editing and updating using Ajax and server-side rendered templates.
    • Implemented a downloadable custom PDF report using HTML-to-PDF rendering techniques to ensure proper formatting and layout of the final document.
    • Instituted an automating testing policy and implemented a complete integration test suite to provide full coverage of new features.
    • Added analytics tracking to the web application using Segment, Mixpanel, and Google Analytics.
    • Used modern methods of social engagement such as commenting, up/down voting, etc. to allow users to engage and collaborate on application-specific items.
    Technologies: Ruby on Rails, Heroku, PostgreSQL, Twitter Bootstrap, Rspec, Capybara
  • Web Developer, CTO

    2013 - 2016
    eDivv, Inc. (Contract)
    • Implemented an online marketplace and bartering platform for trading beauty products.
    • Provided post-development technical leadership to the executive and development team, including reviewing code, generating business flows and wireframes, and other consultation services.
    • Identified performance bottlenecks and opportunities for optimization on the Heroku hosting platform.
    Technologies: Ruby on Rails, PostgreSQL, Heroku, Sass, jQuery, Stripe, Twitter Bootstrap, Algolia,, USPS
  • Web Developer

    2015 - 2015
    Curated (via Toptal)
    • Built a custom Zapier app with triggers and actions specific to the Curated software service to allow integration with hundreds of other Zapier-supported software services.
    • Created a system for triggering and subscribing to web hooks for various application events.
    • Implemented time-based, recurring, and event-triggered transactional emails containing summary reports and user-action reminders.
    • Optimized the performance of click- and open-rate statistics reports using counter caches and denormalized tables rather than ad-hoc SQL queries.
    • Implemented the next-generation (v2) of a legacy REST API with updated conventions, best practices, and code improvements.
    Technologies: Ruby on Rails, Zapier, Mandrill, PostgreSQL, REST API
  • Web Developer

    2015 - 2015
    Buster, Inc. (Contract)
    • Helped launch a fully redesigned second generation of this product over a three-month period.
    • Created a custom, rules-based engine for scheduling and sending customer leads to qualified vendors within the system in order to maximize profit.
    • Implemented custom front-end designs and user experience flows using SASS/CSS and JavaScript.
    Technologies: Ruby on Rails, JavaScript, Sass, Heroku
  • Web Developer

    2013 - 2015
    Map-tac LLC (Contract)
    • Designed and built a custom itinerary building tool and marketplace for travel professionals and their clients.
    • Created a custom search algorithm for indexing and finding tours based on user criteria using Elasticsearch.
    • Developed a custom tagging tool for marking trip destinations using Yahoo!'s GeoPlanet API.
    • Built a white-labeled search engine front-end featuring fully data-driven theming, branding, and content curation.
    • Integrated dozens of third-party data feeds from suppliers, normalizing the data to allow the search engine user experience to be consistent regardless of the content's source.
    Technologies: Ruby on Rails, PostgreSQL, Elasticsearch, Heroku, Sass, CoffeeScript, jQuery, Google Maps
  • Web Developer

    2011 - 2012
    Affirmify, LLC (Contract)
    • Designed and implemented a response management software-as-a-service system for HR professionals.
    • Created a custom Wufoo-style form builder using JavaScript.
    • Built a multi-tenant account system with custom subdomains for each subscriber.
    • Implemented a subscription-based payment model using Chargify.
    Technologies: Ruby on Rails, PostgreSQL, Heroku, Sass, jQuery, Chargify
  • Senior Software Engineer

    2008 - 2011
    Total Computer Software
    • Designed and implemented a system-wide data searching algorithm and accompanying user interface.
    • Architected and implemented an inter-agency data sharing system using C#, the .NET framework, and Windows Communication Foundation with an emphasis on interoperability, distributability, and security.
    • Designed and implemented a mapping system integrated with ESRI ArcGIS web services to display maps, locate addresses, and retrieve geo-data.
    • Discovered and corrected architectural design flaws to improve program efficiency and performance.
    • Maintained a data-driven user interface validation system to enforce good data input.
    • Handled user interface development using Windows Presentation Foundation.
    Technologies: .NET


  • The Standard Hotel (Development)

    Custom content management system (CMS) powered website for an international boutique hotel with properties in the US, UK, and Maldives.

  • BiG Media (Development)

    AI-powered tools for video creators enabling remote production and post production.

  • Tripwing (Development)

    An itinerary builder and online marketplace for travel professionals and their clients.

  • Buster (Development)

    An Uber-style marketplace for group transportation. Allows consumers to book limos, buses, vans, etc., and provides back-office tools for transportation providers to manage inventory, accept bookings, and charge customers.

  • Curated (Development)

    A software-as-a-service platform for creating, managing, and sending beautifully curated newsletters.

  • eDivv (Development)

    An online marketplace for trading beauty products.

  • Affirmify (Development)

    A response management system for HR professionals.

  • Nafasi (Development)

    A platform to facilitate engagement, collaboration, and discovery between innovators and talented job seekers.

  • Keep Calm and Transition to a New Development Team (Publication)
    Many product owners don’t have a technical background and thus often find themselves unprepared and scrambling when it comes to bringing on a new development team. This often results in hindered progress, wasted time, and frustration for everyone involved. If this sounds like it could be you, either now or in the future, then you should be somewhat concerned. In this blog post, Toptal Freelance Software Engineer Carlos Ramirez III will walk you through the various steps of a typical transition process in project management so you can prepare for this eventuality and make the transition as smooth as possible.
  • How to Use Rails Helpers: A Bootstrap Carousel Demonstration (Publication)
    One of the most misused, misunderstood, and neglected of all the Rails built-in structures is the view helper. Helpers often get a bad reputation for being a dumping ground for one-off methods used across the entire application's view layer. But what if your helpers could be more semantic, better organized, and even reusable across projects? What if they could be more than just one-off functions sprinkled throughout the view, but powerful methods that generated complex markup with ease leaving your views free of conditional logic and code? Let's see how to do this when building an image carousel, with the familiar Twitter Bootstrap framework and some good old-fashioned object-oriented programming.


  • Languages

    Sass, SCSS, HTML5, Ruby, PHP, JavaScript, Haml, CoffeeScript, SQL, CSS
  • Frameworks

    Bootstrap, Bootstrap 3, Slim, Ruby on Rails (RoR), minitest, Bootstrap 4, ZURB Foundation
  • Libraries/APIs

    REST APIs, Ruby on Rails API, Vue.js, TensorFlow, Yahoo! API, jQuery,, Stripe, React, Ruby Page Object, Chargify, Facebook API, GitHub API
  • Tools

    Basecamp, Trello, Cluster, RSpec, Zapier, Bitbucket, GitHub, Git, Slack, Vim Text Editor, Pivotal Tracker, Sublime Text, Campfire, Solr, VirtualBox, Vagrant, Asana, MailChimp
  • Paradigms

    Unit Testing, Minimum Viable Product, Plain Old Ruby Object (PORO), Object-oriented Programming (OOP), Test-driven Development (TDD), Agile Software Development, REST, Responsive, Model View Controller (MVC), Functional Programming
  • Platforms

    Mixpanel, Heroku, WordPress, Amazon Web Services (AWS), MacOS, Mandrill
  • Storage

    JSON, Elasticsearch, SQLite, Media Queries, MongoDB, PostgreSQL, MySQL
  • Other

    UI, Product Development, Back-end Development, Front-end, Technical Project Management, Lean Startups, Full-stack, User Interface (UI), Front-end Development, Software Engineering, User Experience (UX), React.js, Full-Stack Developer, UI, UX, and Front-End Developer, Web Developer, Webhook, APIs, Team Mentoring, Ajax


  • Bachelor's degree in Computer Science
    2004 - 2008
    Williams College - Williamstown, MA

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