You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Sylvain GermaineSG

Average response time: 1 hour

Freelancer profile translated to English.
Back to original language

About Sylvain

Flutter Firebase mobile developer and cross-platform application development (Android, iOS, desktop).

Self-taught with over 5 years of experience in mobile development, I design robust, user-oriented applications. My approach combines software engineering, functional UX, and product logic.

Before my career change, I worked for over 25 years as a sports educator and trainer, with extensive experience in coaching and pedagogy. This experience directly influences my way of designing simple, intuitive, and engaging applications.

I am autonomous across the entire development cycle: architecture, UI/UX, Firebase integration (Auth, Database, Storage, Remote Config, Functions), REST APIs and AI, testing, analytics (Mixpanel), monetization (RevenueCat), as well as publication on Google Play and App Store.

Recent Projects

• YouTale Kids (2021–present)
EdTech application with interactive audiobooks for children (6–12 years old), featuring narration, multiple-choice scenarios, interactive logic, and a multilingual experience.

• Brick Breaker: BreakFit Fun (2023)
Flutter mobile game with a custom game engine, levels, bosses, animations, and a progression system.

• ExcuseMe (2025)
Creative application generating humorous or poetic excuses, with a user feedback system.

• Entrepreneurs Quotes Widget (2026)
Business quotes application with dynamic widgets, notifications, and personalized content.

• AI Pray (2026)
AI-generated Christian prayer assistance application, with personalized content and a simple, accessible mobile experience.

I am currently seeking remote freelance missions, both short-term and long-term, for Flutter mobile projects or complete digital products. I am rigorous, autonomous, and product-delivery oriented.

Available remotely (UTC+4), flexible, and accustomed to international collaborations.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Whispering Studio (projets personnels)
    Flutter-Firebase Developer / Mobile App Creator
    ENTERTAINMENT AND LEISURE
    January 2021 - Today (5 years and 5 months)
    Full development of several Flutter mobile applications, from design to store publication.

    • YouTale Kids – EdTech (interactive audiobooks for children) (2022-present)
    Immersive educational application for children (6–12 years old) combining audio narration, interactive multiple-choice scenarios, and a multilingual experience.
    Responsibilities: UX/UI design, Flutter architecture, Firebase integration (auth, database, dynamic content), custom UI, Google Play publication.

    • Brick Breaker: BreakFit Fun – arcade mobile game (2023)
    Breakout-style game with custom gameplay.
    Responsibilities: game engine development, collision management, score and progression system, animations, performance optimization, store publication.

    • ExcuseMe – creative application (2025)
    Generator of humorous, poetic, or absurd excuses with dynamic content and user feedback.
    Responsibilities: generation logic, Firebase backend, UI/UX, multilingual management, deployment.

    • Entrepreneurs Quotes Widget – business motivation app (2026)
    Business quotes application with dynamic widgets and personalized notifications.
    Responsibilities: widget integration, content system, push notifications, Flutter architecture.

    • AI Pray – AI Christian Prayer App (2026)
    AI-assisted personalized prayer generation application.
    Responsibilities: AI integration, dynamic content generation, simplified UX, product structuring.

    Overall responsibilities across all projects:

    - Design and application architecture
    - Full Flutter development
    - Firebase integration (Auth, Database, Storage, Remote Config)
    - APIs and AI features
    - Testing and debugging
    - Google Play / App Store publication
    - Post-release monitoring and continuous improvement

    Product-oriented approach: delivery of complete, ready-to-use applications, with strong attention to stability, user experience, and functional consistency.
    Cross-platform Flutter Development Mobile App Deployment Complete Firebase Integration Mobile Application Architecture External API Integration

Recommendations

Be the first to recommend Sylvain

Help this freelancer shine by sharing your experience working together.

These freelancer profiles also match your criteria

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Skill set

Categories