Freelancer profile translated to English.
Back to original languageAbout Simon
Expert React Native and Expo developer since 2020, I specialize in migrating 'legacy' applications to the modern Expo architecture.
My goal: reduce your technical debt, accelerate your development cycles, and improve the reliability of your deployments.
Resolving Maintenance Friction
Traditional React Native version upgrades often lead to complex native conflicts and time-consuming builds. I implement the Expo stack to address this permanently:
Prebuild: Automated generation of iOS and Android folders. Gradle/CocoaPods conflicts disappear, making updates predictable.
EAS Update: Over-the-air deployments to push critical fixes to production instantly, without waiting for store approval.
EAS Build: Securing continuous integration (CI/CD) through optimized and reproducible cloud infrastructure.
Methodology and Knowledge Transfer
A technical overhaul shouldn't block your product roadmap. I propose a structured approach:
Technical Audit: Analysis of your codebase to assess feasibility and deliver a detailed migration roadmap.
Custom Migration: Progressive deployment. If your application requires specific native modules (third-party SDKs), I develop the necessary 'Config Plugins' for their integration.
Mentoring: Training your development teams on best practices for this new ecosystem to ensure their complete autonomy after my intervention.
Available to audit your application and define the most suitable migration strategy for your technical context.
Simon
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- MOBIAPPSReact Native legacy to Expo MigrationDIGITAL AND ITOctober 2025 - October 2025Nantes, FranceIntervened on a legacy React Native mobile application, with the objective of modernizing and migrating it to Expo, while securing the update of the entire mobile stack.I took over an existing mobile project to evolve it towards a modern React Native stack, progressively migrating native configurations to Expo configurations and plugins.The mission also included updating key dependencies, notably React Navigation, and managing the necessary breaking changes to align the application with the latest versions of React Native and the new architecture.
- CAMPING-CAR PARKReact Native, Expo Mobile Application RedesignTRAVEL AND TOURISMJanuary 2025 - September 2025 (8 months)Pornic, FranceIntervened on a consumer mobile application in production, dedicated to the booking and management of campervan trips, with significant stakes in reliability and user experience.Led the redesign of the mobile application. Improved architecture, performance, and developer experience. Close collaboration with product and backend teams.Delivered features used daily by a large user base, such as the booking process, smart search, and a native map view.
- CAMPING-CAR PARKMigration of a legacy React Native application to ExpoTRAVEL AND TOURISMMarch 2024 - September 2025 (1 year and 6 months)Pornic, FranceIntervened on a consumer mobile application in production, dedicated to the booking and management of campervan trips, with significant stakes in reliability and user experience.Took over a legacy React Native application and led its migration to Expo.Restructured the mobile project to improve maintainability and scalability. Supported a team to increase their autonomy. Acted as a mobile referent for technical choices and best practices.
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Education
- Master in Physics: Lasers and ApplicationsUniversité Lille 12014Cursus scientifique en physique fondamentale avec une spécialité sur les lasers et l'interaction lumière matière.