Freelancer profile translated to English.
Back to original languageAbout Fabio
As a developer specializing in React Native (Expo) and Next.js / Nuxt, I assist in the creation and evolution of high-performing, modern, and growth-oriented web and mobile applications.
In recent months, I participated in the launch of a fitness/running app backed by a well-known sports influencer. I developed numerous features, integrated complex Figma mockups (advanced customization, animations, dynamic interactions), and contributed to refactoring the architecture to handle significant load increases.
Today, the app has over 80,000 users, including more than 9,000 premium subscribers. The challenges: performance, stability, user experience quality, and product/design coordination in a context of rapid growth.
In parallel, I took over a fitness app developed in Flutter for a sports coach (+200k combined followers). Objective: stabilization, continuous improvement, preparation for iOS/Android stores, and adherence to a defined budget. I also designed and deployed a NestJS backend to structure the infrastructure.
I also worked on the complete optimization of an e-commerce search engine via Algolia: implementing weighting, adjusting relevance criteria, and improving conversion rates through fine-tuned business logic integrated into the ranking.
Key Expertise:
- React Native (Expo)
- Next.js / Nuxt
- Pixel-perfect Figma Integration
- Complex Animations and Interfaces
- Performance Optimization
- Algolia (Search & Conversion-Oriented Ranking)
- App Store / Google Play Preparation
NestJS, GraphQL, and Supabase are backend assets when the project requires them.
Structured, product-oriented, and results-driven approach.
If you are developing an ambitious application and looking for a solid front-end developer capable of handling real growth challenges, I can assist you.
English
Fluent
French
Native or bilingual
Remote only
Primarily works remotely
Experience
- ElevateDevelopment of a high-growth fitness/running/nutrition mobile applicationSPORTSFebruary 2025 - Today (1 year and 4 months)Toulouse, FranceI am involved in the development and evolution of Elevate, a fitness/running/nutrition app backed by a renowned sports influencer, which currently has over 9,000 premium subscribers and peaks of tens of thousands of users during seasonal challenges.Technical Stack Used:
- **Front-end**: The application is developed in React Native (bare workflow). I integrate complex Figma mockups (advanced customization, animations via Reanimated, dynamic interactions) and contribute to refactoring the architecture to handle significant load increases. The CI/CD pipeline relies on Fastlane and Bitrise for automated deployments to both stores.
- **Native Integrations**: Development of Swift and Kotlin modules for advanced features, iOS Live Activities (tracking workouts on the lock screen), WorkoutKit (sending sessions to Apple Watch), native background GPS.
- **In-app Events**: Creation of seasonal challenges (Summer Challenge, Winter Challenge…), high-traffic events that have demonstrated the application's ability to handle load with peaks of simultaneous usage.
I also integrated an art direction change into the existing application.Daily Challenges:Performance, stability, user experience quality, and product/design coordination in a context of rapid growth. - MaxxTakeover and stabilization of a fitness mobile applicationSPORTSNovember 2025 - March 2026 (4 months)Toulouse, FranceI completely took over the front-end development of the Maxx (Fit by Alexia) application, a fitness app backed by a sports coach with over 200k followers. The existing application, developed in Flutter, required a complete front-end overhaul to ensure stability and scalability.Technical Stack Used:
- **Front-end**: Complete takeover of the existing Flutter code, with architecture refactoring to ensure a healthy and maintainable foundation. Implementation of an OTA (Over-The-Air) update system for Flutter to allow rapid deployments without going through the stores. Preparation and publication on the App Store and Google Play.
- **Back-end**: Design and deployment of a complete NestJS backend, structuring the server infrastructure from scratch to meet the application's needs.
- **Monetization**: Implementation of the in-app subscription system via RevenueCat, including paywalls, free trials, and subscription management.
The main objective was to stabilize the application, continuously improve the user experience, and adhere to a defined budget while regularly delivering new features. - Art Know ArtFront-end and back-end development of a scalable mobile applicationCULTURENovember 2024 - Today (1 year and 7 months)Toulouse, FranceI led the complete development of the Art Know Art application, an innovative platform dedicated to art discovery, focusing on both the front-end and back-end.Technical Stack Used:
- **Front-end**: The mobile application was developed in React Native for a fluid user experience on iOS and Android, using Expo to simplify development and OTA (Over-The-Air) updates. The design was handled with NativeWind (Tailwind for React Native), providing a consistent and maintainable design, and complex animations were managed with Reanimated to ensure optimal fluidity in transitions and interactions.
- **Back-end**: Back-end management relies on Supabase, and a GraphQL API for optimized and flexible queries, retrieving only necessary data. Additionally, Prisma was used as an ORM to facilitate database interactions while ensuring strict typing.
This architecture ensures significant scalability while remaining simple and maintainable, ready to evolve easily to meet future platform needs.
Reviews
Cyril
DeepSmile Technology
Reviewed on 1/19/2025
Fabio did an excellent job under pressure and went the extra mile to achieve the objectives.
C
Christophe
Noese
Reviewed on 8/19/2024
Conscientious and rigorous, we are taking on another mission...
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Education
- Web & Mobile Developer — Self-taughtSelf-taughtFormation autodidacte en développement mobile (React Native, iOS, Android) et web (TypeScript, Node.js, Next.js). Apprentissage continu via documentation officielle, projets en production et veille technologique.