San Mônico

An application to help children with simple mathematics questions.

This application had a partnership with Google and was featured in the "Designed for family" program that labels apps and games that parents can let their children use without parental control.

As this application also targets children under 13 years old, dealing with user data and privacy was a technical challenge.

A mobile companion app keeps track of your statistics and achievements on Gran Turismo Sport game for Playstation 4 console.

After frequent instabilities in the official mobile application maintained by Sony itself, hundreds of comments flooded their app reviews mentioning the "unofficial" app. This ended up having Sony email us a request to unpublish the application from all application stores claiming copyright infringement.

Even though we unpublished the app, we managed to put it back online after some changes that could not be argued anymore.

A Linux distribution based on ArchLinux ARM developed for ARMv6h and ARMv7h SBCs Raspberry Pi Zero, Zero W, 2, and 3.

The project is entirely developed using Bash v4.4 and configures the base ArchLinux ARM installation with Xfce, LightDM, Pamac, Swapfile, tmpfs, and hardware-specific drivers.

An Express.js middleware is used to detect voting bots in real-time to solve two major problems on a reality show on TV that, during a time window, has a voting system to pick which participant will leave the show.

The first major problem before the solution is caused by the post-processing that has to be applied after the voting is closed, so the TV presenter has to keep interacting while the tech team filters them out.

The second is that the real-time statistics sent to the TV presenter while the voting is open might not reflect the correct statistics, meaning that the presenter might lead the show in the wrong direction, losing audience and engagement.

This allowed us to detect bot attempts to register a vote and block it from being registered, making the real-time statistics correct and have the result right after the voting closed.

A small fintech company that provides services for small businesses had an API that, during heavy load times, eagerly opened multiple database connections and caused the AWS instances' auto-scale configurations to resize themselves and cause huge billings for their operations.

I created configurations in Sequelize to reuse open connections instead of opening new ones, to identify and close idle connections, and to limit the maximum number of open connections so any other connection goes into a queue waiting for connections to be open.

I also motivated the team to use good development practices to avoid events like this happening again.

This resulted in a reduction of operation costs.

A Node.js application for processing payments. I introduced to the development team DevSecOps steps to identify vulnerabilities from their open-source dependency libraries (and also recursive dependencies) using npm's own audit service and third-party providers like OSS Index by Sonatype and Snyk.io.

The purpose of these steps is to reduce the risk of open source, minimize exposure to vulnerabilities, and offer reliable and secure payments for clients and customers.