Freelancer profile translated to English.
Back to original languageAbout Yann France
Web and mobile application developer: GO | Typescript | REACT | Flutter
If you are looking for a mobile app developer to join your team or want to develop an application for Android and iOS, you are in the right place.
I am a developer with +3 years of experience, specializing in Android and iOS mobile application development.
I can assist you from A to Z:
- Defining your needs
- Mobile application development
- Native Android development with Kotlin and Jetpack Compose
- Native iOS development with Swift UI
- Cross-platform development with Flutter
- Creating an Android and iOS mobile application
- Deployment on the Play Store and App Store
My latest experience:
Malea | Social network for good addresses (Flutter):
- Complete development of the application
- End-to-end encrypted messaging, Social & Community (Complete friend management system, personalized profiles, and interactive news feed, Geographic Intelligence (Google Maps API): Advanced mapping integration for discovering places and businesses in real-time. Users can explore, identify, and share local establishments directly through an interactive map interface, Engagement: Post sharing system (photos, reviews)
Ready to bring your mobile app project to life? Contact me now to discuss your needs. I respond within 1 hour and can start quickly on your project!
I also develop web applications
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km)
Experience
- Promo ManagerFull-Stack Developer (Go / React)SOFTWARE PUBLISHINGMay 2026 - Today (1 month)Paris, FranceDesign, development, and industrialization of Promo Manager, an enterprise-grade B2B SaaS solution enabling merchants and e-commerce platforms to generate, manage, and integrate secure gift card campaigns and loyalty programs via API.Responsibilities and Achievements:Architecture & Backend Development (Go):Design and development of a high-performance REST API in Go, powered by the Gin framework and the GORM ORM.Implementation of secure and unique gift card code generation using robust cryptography (crypto/rand).Development of an transactional emailing automation service with dynamic PDF invoice/card generation integrating interactive QR Codes (gofpdf, go-qrcode).Platform security through dual authentication: JWT for user sessions and API-Keys for secure server-to-server calls.Frontend & UX Engineering (React / TypeScript):Development of a minimalist, high-contrast Merchant Dashboard (Swiss design style), ensuring optimal readability and excellent user experience.Design of a reusable and responsive proprietary Design System, integrating fluid micro-animations via Framer Motion.Integration of an interactive statistics dashboard with real-time display of key KPIs (remaining balance, usage rate, transaction volumes).Payment, Integration & E-commerce Ecosystem:Robust integration of the Stripe Connect API for secure management of monetary flows and inter-merchant fund transfers.Design of bidirectional asynchronous synchronization with Shopify (Price Rules API and Webhooks) to automate the creation and deletion of coupons upon their first use.
- 360LearningFull-stack Web Developer (NestJS / REACT)EDUCATION AND E-LEARNINGMarch 2025 - May 2026 (1 year and 2 months)Paris, FranceDeployment of a complete e-learning platform (LMS) and a marketplace of training courses for businesses. The main challenge was to create an automated ecosystem allowing trainers to monetize their knowledge autonomously.• Architecture & Front: Development of a modular REST API with NestJS (TypeScript) and a high-performance frontend with React/Vite. Configuration of an application proxy on the frontend for centralizing API calls and secure data exchange.• Fintech Expertise: Complete integration of Stripe (Payments & Connect) to manage payments, refunds, and automatic transfers to trainers (15% platform commission).• Content & Engagement Engine: Creation of a Trainer Studio managing various pedagogical formats (Videos, Articles, Interactive Quizzes) and implementation of a flexible promotional code system and an advanced search engine with category filters.• Scalability & Real-time: Optimization of database performance (PostgreSQL/Prisma) with pool management via PgBouncer. Implementation of a WebSocket API Gateway for managing instant chat between students and trainers.• DevOps & Deployment: Complete configuration of a VPS, management of the Nginx web server (Reverse Proxy, SSL), and deployment of the production environment
- OMEA IDWeb Developer (NESTJS, REACT)TRANSPORTATIONOctober 2022 - March 2025 (2 years and 5 months)FranceDesign, optimization, and security of critical sales web services and ticketing components in the connected mobility sector (MaaS). The main challenge was to ensure high availability of transaction APIs and 100% automation of data flow validation.• Architecture & Sales APIs: Development and maintenance of modular microservices with NestJS (TypeScript) dedicated to order funnels, dynamic pricing, and transport ticket delivery.• Quality Assurance (QA) Automation: Design and deployment of internal automated testing solutions combining NestJS and React.js to control, execute, and centralize non-regression test reports.• Data-Driven Test Engineering: Creation of large-scale Postman collections coupled with dynamic validation scripts (JavaScript) to inject massive datasets and validate API response schema compliance.• Reliability & Robustness: Implementation of advanced error handling strategies and strict data validation (class-validator) to intercept anomalies before they impact production.• Engineering Culture: Driving force in continuous improvement of the codebase through rigorous code reviews, implementation of strict linters, and writing technical architecture documentation (Swagger/OpenAPI)
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Education
- Bac+3, Bachelor, ConcepteurETNA (École d'alternance en informatique)2023Bac+3, Bachelor, Concepteur
- Bac +2, Diplôme Universitaire de Technologie – InformatiqueIUT Paris cité2019Bac +2, Diplôme Universitaire de Technologie – Informatique