I have had App Store submissions rejected over status bar contrast. How the status bar, the navigation bar and the home indicator work, what edge-to-edge changed on Android, and how to configure each bar in Flutter, Jetpack Compose and SwiftUI.
How Widgetbook solves the documentation problem in Flutter projects with a custom design system. On Direção Fácil, it became a visual catalog, a contract with Figma, and precise context for Claude Code to generate screens using the right widgets.
I pulled two working Google Maps API keys out of mobile apps in under a minute, both with no restrictions at all. Both reports were closed as Informative on HackerOne. Here is the extraction with apktool, the endpoint validation, and the three layers that actually fix it.
Automating Android app documentation and testing with an AI agent in Claude Code, wired to an MCP server that drives a real device over ADB.
You'll never struggle with the iOS Keyboard in Flutter again! See how to solve a common problem in mobile apps for iOS that is…
How I created an image editing app with Flutter. See the challenges, solutions, and monetization of CAM Covers, an album cover editor.
How to set up Fastlane Match from scratch to centralize and sync App Store certificates and provisioning profiles across a team of several developers.
In the world of mobile apps, first impressions are crucial. The Splash Screen is the first screen the user sees when opening your app. In this video, we'll create an amazing Splash Screen for our app using Jetpack Compose.
Learn how to create and configure adaptive icons in Android Studio, so your app looks consistent on any launcher and any icon shape the user picks.
How to implement Firebase Remote Config in a Flutter app: creating parameters, setting conditions and applying changes without publishing a new version.
How to integrate Lottie animations in Flutter, from installing the package to displaying complex animations made in After Effects or Figma, in few lines.
A practical guide on how to develop apps for Android Wear OS using the modern Jetpack Compose toolkit.
How incorrect biometric implementations on Android allow authentication bypass, with real attacks demonstrated from a vulnerability I found and reported.
Discover where to start in mobile development with a practical roadmap, technology comparison, and tips for landing your first job in the field.
Transform your mobile CI/CD flow into a powerful tool for continuous experimentation with Feature Flags and A/B testing.
Discover how A/B Testing and Firebase are used by the biggest apps on the market to create dynamic, user-adapted experiences.
Managing certificates and profiles on the App Store is a crucial step in mobile app development.
Discover the path to automation in mobile development! Unique challenges, essential differences in mobile DevOps, and secrets to overcoming barriers in app store distribution.
Learn how FlashList can make your lists more performant and avoid common problems associated with FlatList.
Learn how to test your React Native code efficiently and effectively.
Learn how to test your React Native code efficiently and effectively.
Learn how to test your React Native code efficiently and effectively.
Learn how to implement Firebase in Flutter applications. A guide to implementing Firebase in Flutter apps.
Shared his path and what he learned about a mobile career at an event by Studio Code and OWASP Belém, with practical advice for people starting out in tech.
Spoke at DevOpsDays Belém on 'The role of feature flags in continuous delivery of mobile apps', joining strategy and technology.
Wrote about building an image editor in Flutter that turns photos into album covers, including how it is monetized and where AI fits.
Talk on 'DevOps for Mobile Development' at the DevOpsDays Belém event (November 2023), on bringing continuous delivery practices to mobile apps.
Developed a wrapper for the Zendesk SDK in React Native, facilitating customer support integration in mobile apps.
Created the game 'Slime Dungeon Survival Game' using Flutter and the Bonfire engine, taking mobile development into game development.
Developed the 'Virtual Pocket Air Conditioning' app as a Flutter animation study project, focused on relaxing sounds.