Artur Ribeiro de Aquino

PENUP is a worldwide Windows app I developed for artists to connect with other artists and enthusiasts through their art. It's a social network that allows many user interactions, such as liking, posting, and commenting. Diverse features enable artists to save drafts, color a predefined drawing, draw on top of a picture, and use multiple layers for a drawing to make things easier.

Live drawing is another exciting feature, allowing users to learn how to draw with the assistance of a video. It shows what to do and pauses the video at specific spots with the correct brush and color for the user to draw on top of the video.

The app is performance-critical because users want to see what they've drawn without delay. This is also true for live drawing, where the brush needs to be exactly where the drawing is being done on the video, which also brings many synchronization concerns. I integrated everything with many calculations for things like image rotation, cropping, and zooming.

True & Co. is a major eCommerce retailer in the United States that sells women's undergarments with an innovative approach. The company aims to fit all body types and be as personalized as possible. Users' comfort is a primary goal, and the company uses AI to address that. PVH Corp. later bought the company.

Because it's a big eCommerce platform, it needs a big structure with high availability. Consistency is an absolute must for selling goods, so we used a relational database. Other requirements include performance, search, and a blog. The architecture is a bit complex with things like an app proxy, Redis cache nodes, MySQL, Elasticsearch, Geodis, and Docker images—all with the proper redundancy.

Integra is an easy-to-use web app used by an energy retailer to manage contracts in the open energy market. Contract calculations were previously executed in a spreadsheet that required manual data entry, which was tedious, time-consuming, and error-prone. Integra prefills fields with information from the contract, and API consumption is enabled through the Brazilian government.

All calculation data is loaded on the front end and implemented together using Vue.js to save requests. This way, calculations are faster and behave similarly to the previously used spreadsheets. There are also multiple tables and graphs, making it easier to monitor all the information.

This solution also reduced costs as the company unsubscribed from third-party software, and client engagement increased because of easily accessible information. Managers have more time for data analysis and can easily handle more contracts, giving them a pleasant user experience.

Proffy is a web application designed to help students find teachers. The teachers are registered, and students can find the one that best matches their needs.

The app allows teachers to register their class subjects and list and filter them according to the student's selection. The student can mark classes as favorites and contact teachers via WhatsApp, and the app tracks the number of times this happens. It can be used through a browser (using React) and a mobile phone (React Native). The back end is a REST API made with Node.js.

This habit-tracking tool aims to help users create new healthy habits through goal setting and progress monitoring. Users can set daily goals (using recurrence rules) and track their progress. Days are color-coded, and there's a progress bar, making it easier to track daily and annual progress. Habits can be used through a browser (using React) and a mobile phone (React Native). The back end was a REST API made with a Node.js using a SQLite database.

I improved a simple blog app where users can log in and write private blog posts (only text).

I added these features:
• Redis cache, allowing faster access to the users' blog posts.
• E2E testing with Jest and Puppeteer.
• Travis CI.
• Scalable image and file upload in AWS, enriching the post content.

The International Collegiate Programming Contest (ICPC) is an algorithmic programming contest for gifted college students. Teams of three represent their university and work to solve real-world algorithm problems, fostering collaboration, creativity, innovation, and the ability to perform under pressure.

In 2008, my team (YaThreeSobas) finished the correct solution for six problems, which granted us 3rd place (gold medal). The only team to solve seven problems was the one in 1st place. This was a great experience because I learned to code memory- and time-efficient algorithms correctly in a short time and gained strong intuition about how performant a solution to a problem can be.

This is the Brazilian web page for this competition: maratona.sbc.org.br/hist/2008/index.html.

Natours is a web application that displays tours and allows users to book them. The tours are displayed on a map.

The users have three roles: admin, tour guide, and regular user. A user is allowed a different set of actions depending on the role. Once logged in, they can book any tour of their choice, review a tour they booked, and rate this tour, among many other things. Stripe manages this process using a credit card to pay for the tour. As a guest, a user can see all the currently registered and all the information about each other.

This project was done using Node.js and Pug templates.