As a self-employed Web Developer, I develop web applications using Node.js and React to deliver responsive and efficient platforms. I recently developed a comprehensive platform for a Brazilian clinic to manage patient records and online scheduling, enhancing operational workflows and user experience.Additionally, I created custom web applications for healthcare professional networks, enabling secure communication, data sharing, and real-time updates. These projects integrated authentication and authorization mechanisms to ensure secure access and utilized RESTful APIs to streamline data management and system communication.My work included building scalable applications with TypeScript and Nest.js, ensuring maintainable codebases, and using MySQL for database management to guarantee data integrity and performance. I also developed user-friendly interfaces with HTML5 and CSS to enhance usability and accessibility, conducting unit testing with Jest to validate code quality and reliability.

Analysis and development of a web system in the ICM (Maintenance Condition Index) project of the Transport and Logistics Laboratory (LabTrans) of the Federal University of Santa Catarina (UFSC).Problem Statement:The ICM project, developed for the Brazilian National Department of Infrastructure and Transport (DNIT), aimed to create a system uses footage of federal highways to manage and maintain the condition of these roads. One of the core challenges during the development of the ICM-Web Application was a significant performance issue. The web application struggled under heavy user load, leading to slow response times, which threatened the overall efficiency and user satisfaction.Solution:The ICM system comprised three main modules: the DNIT-ICM Desktop Application, the ICM-Mobile Application, and the ICM-Web Application, with the latter being the module I directly worked on. Built with a Node.js back-end interacting with a Microsoft SQL Server database, and a React.js front-end, the ICM-Web Application provided highway managers with detailed reports and charts about road conditions. To address the performance issue, I conducted a thorough analysis of the codebase and identified inefficient database queries as the primary bottleneck. I implemented several optimizations, including rewriting and optimizing the database queries, integrating caching mechanisms, and applying asynchronous processing to improve overall application efficiency. Result:The optimizations significantly improved the performance of the ICM-Web Application, resulting in faster response times and a much smoother user experience, even under heavy loads. These enhancements allowed highway managers to access crucial information more quickly and efficiently, ensuring that the system operated reliably during peak usage periods. Additionally, this project deepened my expertise in Node.js and React.js while demonstrating my ability to diagnose and resolve complex performance issues.

I was hired by the High-Performance Geophysics Laboratory (HPG Lab) at the Center for Petroleum Studies (CEPETRO) of UNICAMP to develop a crucial project called "AWS Quota Manager".Problem Statement: HPG was facing significant issues with cloud cost control. Researchers were inefficiently using AWS resources, leading to much higher-than-expected costs. Managers had no automated tools to control usage and relied solely on AWS’s built-in reports, which lacked the necessary granularity and real-time insights.Solution: To address this, I developed AWS Quota Manager, a serverless application (Lambda) created from scratch using Python. This tool allowed managers to assign each user a monthly quota in US Dollars. It included alerts to notify users when they were nearing their quota, and if the quota was exceeded, the application automatically shut down all the user’s services and resources, ensuring that costs remained within budget. On the first day of each month, all quotas were reset to their assigned amounts regardless of the previous month’s usage. The application also provided managers with the ability to generate detailed reports and charts on cloud usage and user quotas, offering greater visibility and control over resources.Result:The outcome of the project was a success, as the AWS Quota Manager effectively solved HPG's issue of cloud overspend. By automating quota enforcement and providing real-time alerts, it significantly reduced costs and ensured that researchers could use cloud resources more efficiently. Additionally, managers gained improved control and insights into cloud usage through detailed reports and charts, helping to keep research projects within budget without compromising operational efficiency.

Development and maintenance of the modules of the hospital management system "Conecte/w", using Visual Basic 6.0 and PostgreSQL database. Main responsibilities: Proposing solutions for new requirements and improvements, developing and testing new requirements, providing customer support in case of problems or questions about the system and participating in meetings with the development team.

Development of web sites for promotional campaigns for Coca-Cola in the United States under the Adobe CQ 5.5 platform, using JAVA/JSP in the back-end and JavaScript frameworks in the front-end, such as AngularJS and the JQuery library, interfacing with RESTful API's. Main responsibilities: Task planning for each project sprint. Performing previously planned development and coding tasks. Reviewing code made by other developers on the team and suggest corrections or improvements when necessary.

I worked at the Palácio dos Bandeirantes through the company Masterdom. The Palácio dos Bandeirantes is the headquarters of the Government of the State of São Paulo and the official residence of the governor. My main activity was the development and maintenance of an application to manage the Governor's schedule, using Lotus Notes/Domino and Microsoft SQL Server. Key responsibilities included: proposing solutions for new requirements for improvement and/or maintenance, developing, documenting, and testing new requirements, and providing customer support for any issues and/or questions related to the applications.

Migration of the website of the Department of Morphological Sciences (MOR/UFSC) from the Drupal framework to Wordpress.

During the Budget Manager Project, I gained significant experience in financial applications and project budget management systems. My role involved analyzing and developing client/server and web workflow applications for IBM USA, collaborating closely with a team based in New York City. I contributed to the design and implementation of complex systems using Lotus Notes 7.x/8.x and IBM DB2 databases, enhancing the efficiency and accuracy of financial operations for IBM. Main responsibilities: Proposing solutions for new improvements and/or maintenance requirements, developing and testing new requirements, providing documentation of developed requirements, providing customer support on any problems and/or questions on the applications, participating in weekly teleconferences with the team and customers in the United States.

Development of web applications using PHP and MySQL database.Main responsibilities: Maintaining and improving web applications, as well as translating one of the products into Portuguese.

I worked on various small projects and enhancements for existing workflow client/server and web applications using Lotus Notes R5/R6 and IBM DB2. My main responsibilities included developing requirements and application models with UML and Rational Rose, generating micro design documents using Rational SoDA, and coding solutions.

Developing web applications using ASP + Visual Basic 6 (COM +) + SQLServer.

During my internship at IBM, I worked as a junior programmer, developing client-server workflow applications using Lotus Notes.

Developing Internet / Intranet websites using Linux + PHP + PostgreSQL.

Designing and updating the website for the Department of Petroleum Engineering at the University of Campinas (UNICAMP).