The great pleasure introduce my self.

I’m Rafael Costa , Im from Brazil. Since 10 years I’m working as developer. Have developed many Web Systems and Mobile

With over five years of experience in mobile application development. I currently work with Flutter. Four years ago I started studying Flutter and I haven't stopped. It's the best tool I've ever worked with.

• Post-Graduation in Mobile Development - IGTI | 2022
• Technologist in Systems Analysis and Development - UCB | 2015

• MTA - Microsoft Technology Associate (Certification nº: E078-4810)
• MCP - Microsoft Certified Profissional (Certification nº: D724-9116)
• Scrum Fundamentals Certified Credential (ID nº: 101167)
• Six Sigma White Belt - S.S.C. and Aveta Business Institute
• Six Sigma Yellow Belt (ID nº 72260) - Six Sigma Study
• CP-501 XML (ID nº 50776306) - National Computer Science Academy
• CP-240 Visual C++ Programming (ID nº 4872816) - National Computer Science Academy
• CP-420 JavaScript (ID nº 4872645) - National Computer Science Academy
• CP-440 Java SE 6 (ID nº 4876236) - National Computer Science Academy
• CP-207 SQL (ID nº 5070834) - National Computer Science Academy

• Languages: Dart, Flutter, Java, JavaScript, Angular, C#, Kotlin, Swift, SQL, NoSQL
• Cloud Platforms: Firebase, AWS
• Methodologies: Agile, Scrum, Kanban

Jan/2022 – Present I worked as the developer responsible for the Usaflex B2B application, participating in the product's creation, evolution, and continuous maintenance. I contributed from the architectural definitions (Clean Architecture, modularization) to the final delivery. I used Flutter Modular and GetX for route orchestration, state management, and dependency injection. I developed responsive interfaces and complex catalog and order flows. I performed integrations with REST APIs, Firebase, DevCycle, Amplitude, and internal services. I implemented tests, worked with CI/CD using Codemagic and GitHub Actions, and was responsible for the entire release flow, build engineering, and post-publication monitoring.

Oct/2021 – Jan/2022 Development of the digital bank application, using BLoC, Flutter Modular, and Clean Architecture principles. Contribution to interface construction, implementation of critical financial flows, secure API integrations, and state/navigation standardization. Worked in a highly regulated environment, ensuring security and reliability requirements were met.

Oct/2021 – Jan/2022 Participation in the development of the Mangos cashback application, built in Flutter with a focus on scalability and high performance. Implementation of GetX for state management and Clean Architecture. Involved in creating registration, authentication, cashback flows, and integration with external services.

Mar/2017 – Jul/2018 Development of internal systems using Java, Spring Boot, and Angular. Focused on backend architecture, REST integrations, service layer modeling, and frontend development, ensuring robustness and security.

Feb/2015 – Nov/2016 Development of web applications using JSP, HTML, CSS, JavaScript, and backend integrations.

Jan/2014 – Feb/2015 Native mobile development for Android, iOS, and Windows Phone, creating flows, screens, functionalities, and integrations.

Feb/2022 – June/2025 Migration of a native production application (Kotlin and Swift) to Flutter, maintaining a hybrid architecture. Built the integration layer between native modules and Flutter using MethodChannels/Platform Channels. Structured the entire Flutter project, developed new features, and performed refactoring. Extracted and published a Design System package.

Feb/2022 – June/2025 Worked on the mobile application (Android/iOS), from initial architecture to continuous delivery. Implemented a scalable architecture (Clean Architecture, Flutter Modular, Triple). Developed complex features (AI chat, optimized video streaming, real-time chat via WebSockets). Integrated with Amplitude and DevCycle. Implemented the CI/CD pipeline with Codemagic and adopted Shorebird.

Jul/2018 – Oct/2021 Developed various Flutter applications, responsible for the entire mobile process, from interface conception to API integrations, store publishing, and post-launch support.