Freelancer profile translated to English.

Description

👋 My name is Johnny,

Flutter iOS & Android Developerwith over5 years of experiencein cross-platform mobile application development.

Some references:

🏅Athlete365— Marvelous Digital for the International Olympic Committee: official mobile application for the Olympic Games

📦 **Yper**: collaborative delivery Flutter application used by Leclerc, Carrefour Emova, Decathlon and many others.

✈️Trave(Founder & Dev): social travel mobile application developed from scratch — allows travelers to centralize, document, and share their experiences through detailed points of interest (accommodations, restaurants, activities), interactive maps, and an engaged community. A complete project, from technical architecture to product strategy.

Very different contexts, one constant: clean, maintainable code, and a product that lasts.

What you can expect from me:

A developer whounderstands your productand not just your specs,transparent collaborationfrom the first exchange to publication on the App Store and Google Play, and a **mobile iOS & Android application that really works**.

Whether you're starting from scratch with a Flutter MVP or already have a foundation to consolidate, I adapt. My goal is simple:deliver an application you'll be proud of, and that truly serves your users.

Have a project in mind? Describe it to me, I'll get back to you quickly. 🙂

Industry field of expertise

Languages

French
Native or bilingual
Spanish
Fluent
English
Conversational
Italian
Conversational

Workplace preferences

Remote only

Primarily works remotely

Marvelous Digital
Application for Olympic athletes
SPORTS
November 2025 - Today (7 months)
Official mobile application for the Olympic Games intended for athletes worldwide. Developed within a team of developers, in a demanding context:deadlines imposed by the Olympic calendar**, **zero room for error**, and a **multilingual international audienceof several thousand athletes.

My role:Flutter development of features, respecting quality, stability, and UX standards.
A project that taught me to work under deadline pressure, in a team, with international-level requirements.
Flutter Mobile Application iOS Android API
Trave
Social travel network application
TRAVEL AND TOURISM
July 2024 - Today (1 year and 11 months)
Traveallows travelers todocument**, **centralize**, and **sharetheir experiences through **structured trips**:
- detailed stages,
- points of interest (hotels, restaurants, activities),
- automatic cost calculation,
- interactive maps and traveler profiles.

A community designed to inspire and facilitate trip planning.

Currently in beta testing.

This project, I conceived and developed it from A to Z:Clean architecture**, **Riverpodstate management,Mapboxinteractive map with hybridGoogle Placesstrategy,PostgreSQLbackend, social authentication (**Google** &Apple Sign-In**), FR/EN **internationalization**, **FirebaseCrashlytics & Analytics, andoptimized cachingsystem to **reduce API costs**.

A project that taught me to think about the product as much as the technical aspects — from the idea to the store.
Flutter Mobile Development iOS Android
Yper
Flutter Developer
TRANSPORTATION
April 2024 - March 2026 (1 year and 11 months)
Lille, France
Yperconnects+450,000 delivery driverswith brands like **Leclerc**, **Carrefour, Intermarché**, **Emova**, and **Decathlon**, across over 7,500 municipalities in France. A high-volume platform, **with two distinct Flutter mobile applications**: one for customers, the other for delivery drivers (shoppers).

My role:developing new product features on both apps, improving performance and stability, implementing A/B tests and managing remote configuration via Firebase Remote Config, and internationalizing the application (i18n).

A structured and demanding environment: Clean Architecture, Riverpod, CI/CD with CircleCI, sprint management in direct liaison with Product Owners and Design teams.
Flutter Mobile Application Apple Android Riverpod

Check out Johnny's experience

Harold

Developpeur Flutter - NightHawk

Several days project

Reviewed on 4/25/2026

I was looking for a freelance developer who was attentive and capable of updating certain application features. And I was lucky to find Johnny! I say lucky because I felt that the profile of a freelance developer who collaborates with you by TRULY trying to realize your vision without prioritizing the financial aspect above all else no longer existed. But with Johnny, I found that passionate freelance developer who sees the project as his own and who supports and advises you. So yes, I was lucky, and I highly recommend him to anyone looking for the same thing, you won't be disappointed!

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