Gustavo Scanferla, Developer in Rio de Janeiro - State of Rio de Janeiro, Brazil
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Gustavo Scanferla

Verified Expert  in Engineering

WebSockets Developer

Rio de Janeiro - State of Rio de Janeiro, Brazil
Toptal Member Since
April 3, 2015

Gustavo is a startup founder and Ruby on Rails expert with over 17 years of experience building and scaling Rails apps. He single-handedly created a video collaboration service used in more than 110 countries—years before Zoom or Google Hangouts existed.


Gartner Digital Markets
Ruby on Rails (RoR), Amazon Cognito, Docker, Sidekiq, Redis, Rollbar
Ruby on Rails API, Ruby on Rails (RoR)
Ruby on Rails API




Preferred Environment

Git, Sublime Text, OS X

The most amazing...

...project I've launched is Pligus, a video collaboration service similar to Google Hangouts, years before Google did it. I built it entirely from end to end.

Work Experience

Ruby on Rails Engineer

2022 - 2023
Gartner Digital Markets
  • Spearheaded the development of a novel authorization and authentication layer for the vendor portal, leveraging the capabilities of Amazon Cognito.
  • Executed a comprehensive refactoring of the entire vendor portal to accommodate multi-user access to a single account, capitalizing on the functionalities of the newly implemented authentication layer.
  • Contributed to the integration and synchronization of data across various services utilizing Kafka. Additionally, designed and implemented background jobs to ensure seamless interaction between diverse APIs.
  • Helped create report generation mechanisms, leveraging background jobs to ensure efficient and reliable data processing.
  • Modernized API endpoints by refactoring them into a new version tailored to support the updated front end.
  • Contributed significantly to the execution of critical data migration processes, ensuring integrity and zero downtime.
  • Played a key role in transforming the monolithic architecture of the main application into a more efficient and scalable microservices model.
  • Actively contributed to developing and managing Kafka consumers, specifically designed to handle mission-critical data streams.
Technologies: Ruby on Rails (RoR), Amazon Cognito, Docker, Sidekiq, Redis, Rollbar

Ruby on Rails Engineer

2021 - 2021
  • Engaged as a Ruby on Rails Engineer, integrating Spin with other services.
  • Collaborated with the Mobility as a Service team, integrating Spin with other systems through MDS (Mobility Data Specification) and other partner APIs.
  • Conducted work on the "Payments" team on payments reporting integration between different systems, code refactoring, and security-related integrations.
Technologies: Ruby on Rails API, Ruby on Rails (RoR)

Ruby on Rails Developer

2020 - 2021
  • Developed a Ruby on Rails API for a time-sensitive project that provided a truck queue management system for plants or the supplier of materials. Completed the project on time.
  • Built a mobile app system where truck drivers can know the estimated wait times at participating plants near them and check-in to save their place in the line.
  • Constructed a management system where plant managers could set queue priorities, update truck statuses, send status updates to truck drivers through SMS messages, and feature user roles management and plant set up.
Technologies: Ruby on Rails API

Back-end Engineer

2020 - 2020
  • Handled customizing Solidus to fit Casper’s large-scale needs.
  • Owned the bugs' fixing process that directly affected sales on production.
  • Created the test tools to be used by the sales team.
  • Developed new features for their logistics and inventory management solution.
Technologies: Amazon Web Services (AWS), Ruby on Rails (RoR), Solidus

Ruby on Rails Developer

2019 - 2019
  • Fixed breaches that could be exploited by malicious users with Ruby on. Rails security.
  • Developed the architecture team, designing improvements for our codebase.
  • Handled the code refactoring and dependency upgrades.
Technologies: Ruby on Rails (RoR), Ruby

Ruby on Rails Developer

2018 - 2019
Linux Academy
  • Developed and maintained some Ruby on Rails microservices, including payments/subscription integration, file management, and the notifications system (Apple, Android, and email).
Technologies: RSpec, Ruby on Rails API

Angular and Ionic Developer

2015 - 2016
Meta Search
  • Built the company's browser (Angular) and mobile (Ionic) apps.
  • Also built the custom UI/UX.
Technologies: Ionic, AngularJS, Ruby on Rails (RoR), Ruby, Angular

Ruby on Rails Developer

2015 - 2015
  • Customized and created plugins for the company's Discourse implementation.
Technologies: Ruby on Rails (RoR), Ruby

Ruby on Rails and Ionic Developer

2015 - 2015
  • Worked as the main Ruby on Rails developer and only Ionic developer for their MVP. Nugg is now California's largest cannabis marketplace, according to Business Insider.
Technologies: Ionic, AngularJS, Ruby on Rails (RoR), Ruby

Founder and Full-stack Developer

2014 - 2015
  • Founded Tidro.
  • Created a system that extracted due dates, task members (owner, observer, worker) and replies just from email content using a customized natural language processor.
  • Developed a service that automatically created and organized multiple projects (and tasks within those projects) just from email content as well.
  • Created a mechanism where you could mark the task as complete, change due dates, unsubscribe from reminders, etc from your email message itself, with a single click. There was no need for any plugin or add-on.
  • Developed a processing system where you just had to include Tidro’s dynamic email address (e.g., and Tidro would do everything described above.
  • Worked with NLP, background jobs, email deliverability, and SMS sending.
Technologies: SMS, Email, AngularJS, Ruby on Rails (RoR), Ruby

CTO and Full-stack Developer

2013 - 2015
  • Helped understand customer needs and identify project requirements.
  • Improved my ability with background jobs, email deliverability, and sending SMS.
Technologies: SMS, Email, Ruby on Rails (RoR), AngularJS

User Interface Engineer

2012 - 2013
  • Made the user’s experience and interaction work perfectly, as fast and efficiently as possible.
Technologies: Backbone.js, JavaScript

Founder and CEO

2007 - 2012
  • Built everything from the front-end to the back-end and everything in between at the age of 17.
  • Developed a real-time communication and collaboration service where any team could work together as if they were in the same room. It was a production ready (with paying customers) video conference (for up to 15 participants!) with collaborative text editing, screen-sharing, and instant messages.
  • Observed and received feedback from about 20,000 users from more than 110 countries. To transform the initial idea into a commercial product, I had to proficiently code in several different languages. as well as use my business and user experience skills.
Technologies: Video Livestreaming, Flash ActionScript, Redis, WebSockets, Node.js, JavaScript, Ruby on Rails (RoR)

User Experience Designer

2009 - 2010
  • Worked in an Agile environment with the home team.
  • Helped them set design standards for the whole site and also design the new home (launched in 2010).
  • Contributed to the UX research team to create and run usability tests in the usability lab.
  • Designed and developed “,” an internship program site still being used to acquire great talent for
  • Created design prototypes which helped co-workers to understand and test new concepts.
Technologies: JavaScript, UX Design

Interactive Video

In 2008, I made an interactive video in which you could build a list of ingredients for a juice by selecting them right inside the video.

Because the video was "edited" in real time, the chef could make a juice with just the ingredients you selected (your custom recipe).

The whole experience was pretty smooth: it even had background music in sync and correct ingredient order. As people said, the video was "at the same time real and magic."

This interactive video helped me land my first job at an advertising agency.
2007 - 2012

Bachelor's Degree in Advertising

UFF (Universidade Federal Fluminense) - Niteroi, Rio de Janeiro - Brazil


jQuery, Ruby on Rails API, Facebook API, Pusher, Backbone.js, Node.js, Sidekiq, Rollbar


GitHub, Git, Trello, Adobe Photoshop, Sublime Text 3, Wowza, RSpec, Sublime Text, Amazon Cognito


Ionic, AngularJS, Ruby on Rails (RoR), Bootstrap 3, Angular, Protractor


HTML5, Ruby, JavaScript, Flash ActionScript


UX Design, UI Design, Responsive Web Design (RWD), Scrum, Agile Software Development, Search Engine Optimization (SEO), Behavior-driven Development (BDD), Test-driven Development (TDD)


Solidus, Heroku, WordPress, Amazon Web Services (AWS), OS X, Meteor, Docker


PostgreSQL, MySQL, Redis


Video Streaming, Audio Editing, Interaction Design (IxD), Video Editing, Freelancing, Google Material Design, SMS, HTML Email, Digital Marketing, WebSockets, Video Livestreaming, Email

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