Gabriel Palmyro

Responsable for the transactions mobile team; Migrated a old polling strategy to work with a lightweight cached solution; Introduced Flutter to others team members

Created alone a couple game app and within 5 months I had 600k new accounts, 5k premium users and a 2.5% conversion rate, built only with Flutter and NestJS

At XP Inc., I played a key role in the development of the new Home Investment page, helping define both the architecture and the UI performance strategy. One of my major contributions was leading the real-time wealth update integration using Server-Sent Events (SSE), which reduced latency after transfers by up to 5 seconds—eliminating the need for manual refresh and significantly improving the user experience. I worked extensively with Cubit and Bloc for state management and applied GetIt with Injectable for clean, scalable dependency injection. I was also one of the main contributors to the animated investment charts now reused throughout the app, delivering both visual quality and performance. On the testing side, I implemented end-to-end automation using Robot Framework, which cut manual QA time in half. I also maintained a robust suite of unit and integration tests to ensure confidence across critical flows. In terms of tooling, I worked daily with Firebase (Crashlytics, DebugView, Feature Flags, Dynamic Links) and used Dynatrace for performance monitoring and error analysis, keeping both code and user experience sharp and reliable.

I architected and developed a full-featured Flutter e-commerce app over five months, applying Clean Architecture and leveraging Flutter, Bloc, Injectable, and GetIt as core technologies. The app included a secure Stripe integration for processing credit card payments, with encrypted data handling across multiple payment methods. I implemented a robust CI/CD pipeline using Codemagic, automating builds and test executions for every release. This reduced deployment effort and minimized production issues. To improve debugging and observability, I created a custom solution using Dio interceptors, enabling better tracking of API errors and real-time insights into local database operations. For navigation, I built an abstraction layer over GoRouter, introducing animated transitions and improving routing control, flexibility, and user experience. The project was backed by unit testing and a maintainable modular structure, resulting in a scalable and production-ready mobile commerce solution.

I was responsible for creating the 'Omni Saúde App' until its stable version using Flutter for mobile development. The app was integrated with payment systems using PIX, barcode scanner, QR code reader, and real-time readings using Supabase. Route and state management was handled using Getx, with Sentry used for analytics and authentication with Supabase.

Orchestrated the Mobile Team, successfully publishing 7 robust Flutter applications and ensuring their continuous operation. Enhanced the experience by restructuring the app experience with Flutter. Diversified expertise by developing web applications using Next.js, demonstrating adaptability and proficiency in various technologies.

I was responsible for creating several modules in the Clube.on app, such as the events module, the payment module with PIX, and the reservations module. I developed a web system using Flutter for members to access using only the browser.