• Developed a multi-tenant research platform supporting real-time collaboration, advanced data grids, and fine-grained role-based access control.
• Designed and implemented real-time collaboration using GraphQL subscriptions, including presence awareness, field-level locking, and conflict prevention based on last-modified (DLM) versioning.
• Built and maintained backend services using Node.js (NestJS, GraphQL), implementing authentication with AWS Cognito and enforcing secure access via JWT-based middleware.
• Contributed to the architecture of a cross-platform application (React.js, Next.js, Electron), focusing on scalability and maintainability.
• Mentored engineers and contributed to technical and product decisions, aligning architecture with business needs and long-term scalability.

• Backend development in NodeJS using Prisma ORM and Express for a startup.

• Built project from scratch, making decisions regarding project organization, technologies to be used, quality standards, and task definitions.

• Implemented tests using Jest, set up development environment in Docker, integrated social media login.

• Provided support to the Frontend team as needed, usign React.JS with TypeScript and Ant Design.

• Integration with FrontEgg, SurveyJS, and JsReport.

• Development of a cryptocurrency app for a fintech startup using React Native.

• Involvement in technical decision, helping problem solving for other developers, and working with the PO and PMs to find the best solutions.

• Building the code base for the backend of a cryptocurrency startup using Node.JS and NextJS, while collaborating with the engineering team to find bests solutions and patterns.

• Creation of new endpoints for Trio's internal human resources system using Node.JS and TypeORM.

• Development of new features for a credit card points exchange app.

• The app was developed for a client who is the largest company in this segment in Brazil. (Livelo by Elopar)

• Helping Jr and Mid level developers to build better solutions.

• Helping the stakeholders to analyze the best approaches to be followed by the app.

• Small project for the development of a MVP for a fintech app using React Native.

• Collaboration with the development team to resolve issues and provide support

• The company is a pioneer in allowing Brazilians to have a current account in USD while residing in Brazil.

• Worked closely with the Mobile team (React Native) to support technical decision-making

• Implemented an internationalization (i18n) system

• Migrated React Native code from a class-based architecture to a function and hooks-based architecture

• Added offline content consumption capabilities

• Analyzed and refactored code with a focus on quality and performance

• Developed new features and resolved bugs

• Development of an educational app with multimedia features such as videos, audios, and text.

• Key responsibilities include overseeing development processes, code analysis(code-review), build/delivery

processes, testing, developer support, and technical/architectural decision making.

• Implementation of offline functionality for the app using RealmDB.

• Additional features developed include a video player, audio player, and testing with Jest.

• Development of an Android native app for reading books.

• Collaboration with major publishers to maintain a large catalog for users (200k+ users and 20k+ books).

• Development of an Android native app for reading magazines and newspapers.

• Creation of custom themes to support different clients

• Development of a credit card app for Itaú Unibanco S.A using Java and Android SDK.

• This is the first version of the app run on native Android code.

• Active collaboration with multiple teams, with a total of approximately 40 people involved near with my

team.

• Development of a new bank app for TriBanco using the JavaScript framework Kony, which allowed for com

pilation on both iOS and Android.

• Creation of new features at an educational website.

• Worked as a Full-Stack developer using Javascript with Ajax and PHP.

• Responsible for creating new end-points for a system where students can perform online exercises.

• The teacher can create new exercises and send them to students or use exercises from a pre-made data base, they receiving instant feedback on student performance.

• Development of a truck delivery management system

• Responsible for creating a new interface based on user needs.

• Project used Delphi (Object Pascal) with a SQL server.

• Created a report generator in .xml format with information about the last trips made by the company's couriers, as well as a report that cross-referenced information from TOTVS' ERP with the company's system

• Development of FTDs (Flight Training Devices).

• Created communication between hardware and software "Microsoft Flight Simulator”.

• Used openGL to render realistic controllers based on what is happening at Microsoft Flight Simulator.

• Integrated with USB components to simulate components of a real plane, and helped the team test and find bugs in the simulator.