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Julien Grand-ChavinJG

Julien Grand-Chavin

Senior Flutter & Backend Developer

€450/day
Genève, CH
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Julien

Mobile developer specializing in Flutter, with over 8 years of experience. I co-founded Revolt Games, where I designed and developed Neopolis, an augmented reality mobile game that reached 5M users, 300K MAU, and $1.5M ARR at its peak. Today, I work as a freelancer, helping startups and companies create modern, fast, and elegant mobile applications. I enjoy designing fluid experiences, prototyping quickly, and delivering high-quality products – often with my dog Shelby sleeping next to my desk.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Appton
    Co-Founder & CTO
    TECH
    April 2025 - Today (1 year and 4 months)
    Mobile application studio 📱

    🔗 https://appton.io

    📱Flutter mobile application development
    ⚙️Go server development
    🗄 Supabase database
    ☁️ Server hosted on Railway
    💰Subscription and in-app purchase
    🤖 OpenAI API integration
    📩 Push notifications
    Flutter GO Supabase Mobile Application artificial intelligence
  • Quiz Royal
    Mobile and Backend Developer
    VIDEO GAMES AND ANIMATION
    February 2020 - August 2021 (1 year and 5 months)
    Lyon, France
    Personal project of a Quiz mobile game, Battle Royale style 👑⚔️

    🔗 https://quizroyal.io

    📱Flutter mobile application development
    ⚙️NodeJS server development
    🗄 Cloud Firestore database
    ☁️ Server hosted by Google Cloud Platform
    📩 Push notifications
    Flutter Firebase Google Cloud Typescript
  • Revolt Games
    Co-Founder & Lead Mobile Developer
    VIDEO GAMES AND ANIMATION
    June 2020 - March 2025 (4 years and 9 months)
    Lyon, France
    Monopoly-style mobile game, Pokemon Go version 💰🚶🏻‍♂️(Over 5 million downloads)

    🔗https://www.neopolisgame.com

    📱Flutter mobile application development
    🗄 Cloud Firestore database
    🗺 Map management with Mapbox
    Flutter Firebase Google Cloud Mobile Development

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Education

  • Scientific Baccalaureate
    CNED
    2013
    Via Pôle France de Ski Nordique + CNED (Centre d'Enseignement à Distance)
  • 2nd year Computer Science Bachelor's Degree
    University Grenoble Alpes
    2017
    Via Pôle France de Ski Nordique + Université Grenoble Alpes (par correspondance)

Skill set

Categories