Freelancer profile translated to English.
Back to original languageAbout Gaëtan
Freelance Senior Mobile Developer | Flutter & Android | Apps 50k+ users
With 8 years of experience, I have developed robust applications managing up to 50k+ simultaneous users. My added value: I combine technical expertise with product vision to deliver solutions that truly work.
🏆 Top Malt profile in mobile development - Supermalter
🎯 10+ missions completed
⭐️ 5/5 on all my missions
💬 Responds quickly
🚀 How I can help you
- MVP & Prototypes : Launch your app quickly (iOS + Android with Flutter)
- Audit & Optimization : Solve your performance issues and bugs
- Technical Lead : I support and train your teams
- Technical Redesign : Modernize your existing app
🛠 Technical Stack
- Mobile: Android (Kotlin, Compose) | Flutter | iOS (Swift)
- Backend & API : Firebase | REST API | BLE | RevenueCat | Stripe | Maps
- Integrations : Stripe | GoogleMaps / Mapbox | RevenueCat | Apple/Google Health | BLE
- Architecture : Clean Architecture | MVVM | Dependency Injection | State Management (BLoC, Riverpod)
- DevOps : CI/CD (GitHub Actions, Fastlane) | Automated tests
✅ Latest achievements
- Connected Health: ISO 13485 Medical App (Remedee Labs)
- Fan Experience: 50k+ simultaneous users platform, synchronized animations
- E-commerce: Ordering and loyalty system (Garnii)
- Fintech: Secure mobile payment solution
- VTC & Mobility: Uber-like platform (Flutter + Firebase + TypeScript)
Want to work together?
Available for short or long missions
→ Contact me to discuss your project
Keywords: application development, freelance mobile developer, mobile, Android developer, Flutter developer, mobile app creation, iOS development, Firebase, native application, cross-platform, freelance mobile developer, mobile MVP
French
Native or bilingual
English
Fluent
Can work on-site
Évian-les-Bains (up to 50km), Grenoble (up to 10km), Annecy (up to 30km)
Experience
- Lady's vtc
On Malt
Senior Mobile DeveloperTRAVEL AND TOURISMOctober 2025 - November 2025 (1 month)Thonon-les-Bains, FranceReal-time race management system
- TypeScript backend with Cloud Functions and Zod validation for the race lifecycle
- RTDB-first architecture with Firebase atomic transactions to prevent race conditions
- Geohashing for driver proximity queries with real-time position updates
Mapbox mapping and routing integration
- Implementation ofMapbox Maps SDKfor real-time GPS race tracking
*Geocodingservice for address/coordinate conversion and favorite address managementSecure Stripe payment system
- Stripe integration with automatic client creation and payment method management
- Test/production environment validation with Google Secret Manager for production keys
Clean Architecture with BLoC state management
- Clean Architecture implementation across 10 business modules with Domain/Data/Presentation separation
- BLoC + Freezed state management
- Dependency injection with automatic code generation
Multi-channel authentication and notifications
- Google/Apple Sign-In authentication with multi-step onboarding (profile, photo, notifications)
- Firebase push notification system for race tracking and driver/passenger communication
- Multilingual support (French/English) with automatic i18n generation
- White MatterSenior Mobile DeveloperHEALTH AND WELLNESSMarch 2025 - July 2025 (3 months)In-app subscription system- RevenueCat integration for unified iOS/Android subscription management- Subscription product configuration with automatic renewal management- Secure transaction validation and cross-platform subscription status synchronizationHealth data integration- Implementation ofApple HealthandGoogle Health ConnectAPIs- Retrieval (weight, calories, etc.) and analysis of health and sports activity dataCross-platform social sharing system- Development of native views (iOS Share Sheet, Android Intent) for sharing management- Retrieval of shared content URLs with associated metadataNutritional analysis via visual recognition-Implementation of photo capture (camera, barcodes)- Image processing via Cloud Functions and AI analysis with ChatGPT API- Automatic return of nutritional data (calories, sugars, etc.)
- ShowUpLiveLead Mobile DeveloperSPORTSMarch 2025 - August 2025 (5 months)Grenoble, FranceDevelopment of an innovativemobile applicationthat transforms spectators' smartphones into lighting elements during concerts and events. AsLead Mobile Developer**, I designed a solution that **synchronizesphones to create collective visual effects.Tasks- Cross-platform mobile application architecture- Development of real-time synchronization systems- Implementation of visual effects and animations- Performance optimization for large-scale events- Dynamic branding system integration
Reviews
Recommendations
HS
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Education
- M2 - Imag, Computer EngineeringUniversité Joseph Fourier (Grenoble I)2015M2 - Imag, Génie Informatique
- M1 - IMAG, Computer ScienceUniversité Joseph Fourier (Grenoble I)2014M1 - IMAG, Informatique