Stefano Diem Benatti

Escola Digital is a search engine for digital learning objects (DLOs). It allows both professors and students to easily find learning materials by selecting its discipline, the recommended year, and several other search options. The engine itself can be easily customizable and allows each installment to create and share content (DLOs) with each other.

Each installment can also completely customize its layout with a simple-to-use interface, and also to define and to see which content is available.

This project was adopted by the Brazilian government, and each state has its own custom installation in sharing and collaborating with each other.

Technology Stack:
• Rails
• React
• MongoDB
• Sunspot
• Chef
• AWS OpsWorks

Guia Edutec is a school/education level analysis web application to aid the Brazilian government in identifying the current issues in the public school system.

First, the manager of a public school answers a complex survey. After that, several aspects are calculated and a report is generated in PDF format informing the result and suggesting corrective actions. The information is stored in a database and can be searched/filtered by any interested party—allowing the comparison and analysis of school performance in a broad spectrum of information.

Currently, there are more than 14,000 public schools registered.

Technology Stack:
• React with Redux as the front-end libraries
• Rails with REST API as the back end
• A simple HTML admin interface that allows CRUD operations on the database

Roteirizador CRC is a geolocation and routing service that solves the problem of the minimum path, given a series of stop-points. Besides the web interface—that allows users to create, compare, and correct routes and see them with Google Maps—it also has an Android/iOS app that allows route owners to track mobile phones using GPS and drivers to follow a given route.

The web application was built with Rails and the Android/iOS versions with PhoneGap

Ribibike is a shared bicycle project consisting of a web application where users can register and add credits, and several totem stations from where they can rent and return bicycles.

The web application was built with Rails and has a REST API. The totem applications are plain Ruby command-line applications that receive data from several sensors through USB ports. It also has a simple LED display used for the interface and it allows a user to sign in with a numeric keyboard.

One of the interesting challenges of this project was configuring the totem machines themselves because they are located in open areas and subject to climate changes, loss of WiFi, and loss of power. So it had to boot/reboot automatically when encountering errors and also restart any services that had errors. It also needed a very robust background job system since internet connectivity could be lost—so that the user wouldn't be charged extra for returning a bike to a station that had lost its connection.

Ensino Legal is an LMS built with Rails which is focused on video lessons.

Aside from the interesting payment and subscription rules (where a user can pay for individuals lessons, chapters, or entire courses for a given duration); another robust implementation was its anti-piracy measures—sending the video using an encrypted streaming service which made it difficult to be downloaded easily.

The Lojas app is an iOS/Android marketplace application. It allows any user to register, buy, and sell products using a simple mobile interface.

It has a cart/checkout process and integrates with Brazilian payment and delivery services.

Technology Stack:
• Meteor
• Angular
• Ionic

Remote Service Stations (RSS) is a startup that aims to make it easier for companies to hire workers who work remotely in Brazil while abiding by Brazilian law and generating legal documentation with ease. One of the most important aspects is the need to control work hours as well as generating work timesheets in specified file outputs. RSS aims to make the process easier by allowing users to track time from anywhere while allowing companies to view timesheet reports and employee activity.

The project was done using Node.js/MeteorJS as the core technology for the web application as well as Java for the desktop application which allowed users to track time with fingerprint authentication. The desktop application sent data to the Meteor web app using socket connections in real-time such as screenshots and input data.

Red LACTI was a social platform created for Telefonica that allowed users to share knowledge and experiences to help stop child labor in Latin America.

It borrowed heavily from Facebook's timeline concept, but it applied to a different context and purpose. It allowed interested people from the government and NGOs from several countries to debate with specialists about its social problems and to share solutions.

It was shut down after two years when Telefonica changed its focus on Latin America from social problems to communication problems.

Technology Stack:
• Ruby on Rails

Bora Trocar was a free-trading marketplace web application.

It allowed users to register any product and trade messages with others to trade their items with theirs. One of its key features was using maps—which calculated the distance between the owner and the interested user—since most trades occurred physically.

The monetization came from advertisements in order to avoid billing users for usage, however as the revenue wasn't very high the development eventually stalled.

Technology Stack:
• Ruby on Rails
• PostgreSQL's PostGIS for geospatial queries

BoCONNECT was an eCommerce for used luxury bags. It allowed clients to sell their bags to BoCONNECT so that it would be resold to another client later.

After a few years, it was merged with another project called BoBags that focused on renting used luxury bags and was unified in the same platform.

BoCONNECT was initially developed with Ruby on Rails and the Spree Rails engine. Several Spree plugins had to be developed to integrate Spree with Brazilian payment and delivery services.

An LMS that was developed specifically for Escola Digital. Its main focus was ease-of-use and interactive media content as well as being easy-to-customize for both its layout and content.

Since Escola Digital is a white label application, we created each installment to be easily configurable (both its layout and content), and its LMS had to allow the same level of customization while also making it very easy to set up.

The system allowed users to enroll in different courses from different Escola Digital installments, progress through the interactive lessons, and to finish (receive certificates of completion).

The user base was registered via an API to connect to Escola Digital, and the certificate used another API to connect to Instituto Singularidades's database.

Technology Stack:
• Ruby on Rails

The TradePEERS app is a startup project to help managers and CFOs to manage and project gains/losses in projects and proposals. It's used in conjunction with a financial consultancy run by Michael Brown, the owner of TradePEERS. It's still under development as we evaluate the needs and user feedback is received.

Technology Stack:
• React, Redux, and GraphQL for the front end
• Graphcool for the back end as a service (BaaS) in unison with Auth0 for authentication and Node.JS for external services

This approach greatly reduced the development time: allowing more time to focus on the user interface and feature set.