Bartolomeu – React, Node.js, Typescript

A platform that gives you user interviews for product research and market validation, without real users. Through the use of AI, the product allows you to interview specific audiences and validate the market fit of your solution without the need for sampling and recruiting people for user testing. It gives you a unique overview of your product, allowing you to uncover features and blockers, without spending as much time and money on user research.

• Built multiple product drafts from scratch as a sole MVP developer for user testing and market validation.
• Integrated a team and developed a final product that suits the requirements gathered from the previous product drafts.
• Implemented no-code and low-code tools so that stakeholders could change business rules without needing developer time
• Implemented large language models months before their boom, together with training and search utilities

Another project Bart created for his personal usage and optimization of the work under projects. The product centralizes all of the projects' engineering foundations in a single place. It is an upgradable boilerplate that packs most of the engineering foundations needed for Full-Stack projects, so developers can start writing business logic immediately.

It comes with an update system that allows projects to keep up with the boilerplate improvements and fixes as time progresses.

This project allows him to quickly start any project and write business logic right away, with all the previous technical foundations he developed in the past. It also allows him to deploy a blank environment for demos on the spot, allowing to start testing new developments since the project start, and thus follow Agile from day 1.

Pros:

• Start writing features right away when starting a project. No more writing boilerplate to kickstart a project. No more days spent setting up tools
• All of your engineering foundations in one place, shared across your projects
• If a foundation needs some fixing or improvement, just write it once and pull those changes into your projects
• Reduce technical debt by having a predictable codebase and tooling that is ready for most use cases and project specifications

Bart has created this project to protect his and his clients' data by running day-to-day apps inside Docker containers. After knowing that saved Chrome passwords and cookies in Linux are not protected against malicious dependencies, he decided to run his core apps in Docker containers, where the data is not accessible without sudo, and a personal understanding of where stuff is saved.

• Created the docker-workspaces that run Chrome in a sandbox;
• Encrypted passwords and cookies with the help of dockerized gnome-keychain;
• Developed the ability to connect headphones to the workspace.

The product was built to fix some shortcomings that many validation libraries have. Most validation libraries try to do a lot, and their code gets confusing with many backs and forths. Not-me solves this confusion by providing enough boilerplate to build developers' validations schemas. This way, it's easy to maintain and improve this package.

• Created a project that reduces bugs caused by different data contracts by describing the same information;
• Created schemas and their methods that allow setting a customized error message for when the value fails to meet the conditions;
• Created type filters, shape filters, and Transform filters that allows having Validation options within the project.

Silicon Valley startup developing intelligent apps with machine learning and telco services.

• Designed and developed Full-Stack apps that are connected to machine learning services and share the same technical core, meaning each project only needs to have its business rules and previously developed features;
• Architected project structures, tools, and frameworks;
• Conducted job interviews for developer positions;
• Supported, planned, and gained feedback from the clients.

B2C and B2B mental healthcare provider in Brazil. It is the leading marketplace of therapists where users can book and pay for appointments with the web or mobile app, and also, the companies can receive insights regarding their employees' mental health.

• Rebuilt the whole company together with the CTO from the small MVP in a smooth transition that never locked the development of new features and allowed to move away from the MVP legacy slowly;
• Used React Native for Mobile App;
• Used Node.js for Data Layer, maintaining and creating New features;
• Used serverless API and ASP.NET for legacy services.