Freelancer profile translated to English.
Back to original languageAbout Yohan
Developer for 4 years, I specialize in React Native with TypeScript, which allows me to write reliable, maintainable, and secure code. I place great importance on the quality of code and the stability of the applications I design.
I am involved in the entire development cycle, from project creation to deployment on the stores (iOS & Android). I am also capable of implementing advanced features, such as setting up integrated payment systems (Stripe, RevenueCat, in-app payments via the App Store and Google Play).
Thanks to my expertise, I can also assist you in choosing the most suitable technologies and services for your project.
French
Native or bilingual
English
Fluent
Spanish
Conversational
German
Basic
Portuguese
Conversational
Italian
Conversational
Can work on-site
Paris (up to 10km)
Experience
- LazonReact Native DeveloperSOCIAL NETWORKSFebruary 2023 - February 2025 (2 years)Paris, FranceDesign and complete development of a social network connecting content creators and their subscribers, offering access to exclusive content via a subscription system.From scratch development of the mobile application with React Native (Expo) and TypeScript, handling the entire process from design to store deployment, alongside the CTO.Implementation of advanced features inspired by major social networks:
- Image and video posting with storage on AWS S3
- News feed and interactive video feed (TikTok format, dynamic discover)
- Likes, comments system
- Chat channels (setting up chat between creators and fans)
- Management of two user types with distinct experiences
- Push notifications via Firebase Cloud Messaging (FCM)
- In-app subscriptions & payments via Apple, Google & Stripe
- Management of payments and payouts to creators via Stripe Connect
- Application deployment on the App Store & Google Play
Main responsibilities:- Architecture and development of all features
- Integration of third-party services (payments, cloud, notifications)
- Optimization of performance and user experience
- Monitoring and preparation for store deployment
The application is in the final stages of completion and is expected to launch in the coming weeks. - OmnegyReact Developer ConsultantENERGY AND UTILITIESMay 2022 - October 2022 (5 months)Paris, FranceResponsible for the from scratch construction of a gas/electricity trading platform.Complete project management, also responsible for an intern developer assisting me on the project.Several graphs developed.App state management with Redux.Missions:Determination of project architectureChoice of technologies and dependenciesTest Driven Development (TDD)Ensuring best possible practices within the codeSpecification analysisNew feature developmentUnit testsBug fixingEvolutionary maintenanceTechnical Environment:Scrum MethodologyFront: Typescript -> ReactBack: PythonFront tests -> React testing libraryREST APIGitLab
- Connecting FoodReact Developer ConsultantAGRICULTUREJuly 2021 - May 2022 (9 months)Paris, FranceFood traceability, blockchain.2 products: a web app + mobile web appSole front-end developer during this period.Specification analysisNew feature developmentUnit testsBug fixingEvolutionary maintenanceDocumentation writingTechnical Environment:Scrum MethodologyFront: Typescript -> ReactBack: Python -> DjangoFront tests -> React testing libraryREST APIGithub
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Education
- Bachelor's DegreeUniversity of Picardie Jules Verne (UPJV)2019