Personal details
Guilherme P.
About
Senior Flutter Engineer with 7+ years of experience building and scaling high-performance mobile applications and games from concept to live operations. Delivered and scaled products reaching 12M+ downloads worldwide, including 5M+ download titles and award-winning products, including Google Play Best of 2021 and Indie Games Fund 2023 selections. Deep expertise in Flutter rendering internals, modular architecture, asynchronous state management, and performance optimization for production-scale environments.
Work Experience
Co-founded and led engineering for a mobile product studio that built and scaled applications reaching 12M+ global downloads. Owned end-to-end development of multiple production mobile apps from concept to release, serving millions of active users. Collaborated closely with product, design, and analytics teams to iterate on user experience, improve retention, and ship high-impact product features. Architected scalable Flutter mobile platforms enabling rapid product iteration while maintaining strong performance and reliability across Android and iOS devices.Key engineering contributions:
- Designed scalable mobile architecture supporting large feature surfaces, including real-time updates, hierarchical data structures, and offline-capable client synchronization.
- Implemented complex UI systems, including dynamic lists, real-time updates, and highly interactive interfaces, while maintaining consistent frame performance.
- Reduced ANR rate from ~30% → <2% through deep production debugging, including memory profiling, thread analysis, and rendering pipeline optimization.
- Reduced APK size by 45% through asset pipeline redesign and build configuration optimization.
- Improved D1 retention from ~25% → ~40% through performance improvements and analytics-driven product iteration.
- Designed Firestore data models and scalable backend infrastructure supporting millions of users with optimized read/write strategies.
- Implemented Flutter platform channels and native plugins in Swift and Kotlin for performance-critical platform integrations.
- Built CI/CD pipelines and automated deployment workflows using CodeMagic, Fastlane, and Firebase App Distribution.
- Performed advanced mobile performance debugging, including UI/Raster thread profiling, frame budget analysis, and memory leak detection.
Developed desktop applications using TypeScript, Angular, and VTEX. Built reusable UI components, improving maintainability and scalability. Collaborated with senior engineers to integrate frontend and backend systems. Contributed to performance improvements and design consistency.