● Contributed to creation of an intern design system with storybook and unit tests, using a monorepo and building all the components initially, increasing our work perfomance and layout.● Implement GraphQl to have a better performance on api requests, reducing the time wait of back-end.● Implement automated and E2E tests using Jest and Cypress to improve the reliability of the system and decrease new usability errors.● Refact our course platform with NextJs 13 to attend more users and improve the SEO, generating a positive impact on sales.● Contributed to CI/CD implementation with Azure Devops, ensuring code patterns and build.

● Using ReactJs, we created a whole system to manage a vulnerability system.● Implement security steps into the application, like google reCaptcha, two factors authentication and refresh token, improving system security.● Migration of CRA to Vite and improved performance steps on build, reducing costs.● Implementing Redux and Redux Saga to state management and flux architecture, increasing system speed.

● Maintenance and fixing bugs in a marketplace system already in production to interns partners.● Refact a part of front-end code, by reason of some legacy code that was made before, increasing projectperformance.● Migration of Sass to styled Components and Implement mobile screens using media queries.● Implement Automated tests E2E, using python-based framework, Robot Framework.

● Development of front-end features using a lot of tecnologies. We used React, Redux e Redux Saga, Context API, React Router Dom, tests and etc.● Criation of our own components, without any UI library. ● As management and development tools we used SCRUM, Gitflow and others.