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Nicolas SanjuanNS

Nicolas Sanjuan

Flutter Developer | Android Applications

€270/day
Nancy, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Nicolas

🚀 Flutter Developer specializing in mobile applications

✅ What I can do for you:
  • Native mobile applicationsAndroid/iOSwithFlutter
  • Transforming your idea into a functional app
  • Modern and intuitive user interface
  • Integration ofAPIsanddatabases

🔹 My experience:
  • +3 years of practice in Flutter (advanced personal projects)
  • Solo development of acomplete**social network** with news feed, notifications, profiles, messaging, comments
  • Ongoing creation of a mobile app for **challenges between friends**: two teams compete in time-limited challenges, for fun while scoring points. Objective: fun, team spirit, and engagement.

I design my projects as real products, with business logic, UX design, performance, and testing.

đŸ’ŒWhy choose me:
  • 5/5 in Flutter - my specialty
  • Fast delivery and clear communication
  • Motivated student with competitive rates
  • Available 20h/week for your projects

đŸ“© Need a first opinion or a quick quote?
Contact me, I'll reply within the day.
Let’s build something great 🚀
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Nancy (up to 20km), Metz (up to 20km), Pont-Ă -Mousson (up to 10km)

Experience

  • Projet Personnel
    Flutter Developer – Friends Challenge Application
    HEALTH AND WELLNESS
    March 2025 - Today (1 year and 3 months)
    Development of a gamifiedmobile applicationallowing multiple teams to join a challenge game via a code. Each game contains a series of identical challenges for all participants, to be completed within a given time.

    Main features:
    • đŸ§© Game creation system with unique code (joinable by multiple teams)
    • ⏱ Time management viaCloud Tasks(Firebase)
    • 💬 Integrated game chat, real-timeFCM notifications
    • đŸ§‘â€đŸ€â€đŸ§‘ Team creation with light profiles (nickname, photo, bio)
    • ✅ Challenge validation system (optional proofs)
    • 📊 Automatic score calculated via Firebase data
    • 🔐Firebase Authentication**, **optimized Firestore structure
    • 🎹 100% custom interface, designed for a fun and simple experience among friends
    Objective: create a social game tool for fun with friends, create memories and team moments. Project still under development, on track for publication.
    Flutter Firebase UI/UX Design
  • Projet Personnel
    Flutter Developer — Complete Social Network
    SOCIAL NETWORKS
    January 2024 - February 2025 (1 year and 1 month)
    Solo development of a complete social network in Flutter, with Firebase as the backend. The project includes a dynamic news feed, a post creation system (photos, description, location via Google Maps API), and fine-tuned custom text search logic (workaround for Firestore's lack of full-text search).

    Main features:
    • 🧠 Personalized feed based on subscriptions (multi-query)
    • ❀ Posts with likes/comments, geolocation, keyword extraction
    • đŸ‘€ User profile with subscriptions, bio, photos, connection views
    • 💬 Personal & group chat system with history management (dynamic scroll, smart pagination)
    • 📅 Calendar module with manually developed daily/weekly/monthly/annual views
    • 🔔 FCM notifications for likes, comments, messages, etc.
    • 🔐 Firebase authentication, storage (Cloud Storage), Cloud Messaging

    This project allowed me to master the design of a complex, real-time app with modular architecture, custom UI, fluid UX, and advanced Firebase integration.

    📍 Project on hold (not published) for strategic reorientation, but complete code ready to be resumed.
    Flutter Firebase UI/UX Design Firebase Firestore Firebase Cloud Messaging
  • GROUPE SNCF
    Design and development of a HyperV management interface via PowerShell
    February 2025 - April 2025 (2 months)
    Nancy, France
    I had the opportunity to learn how a corporate internet network functions and to develop my skills by participating in the design and creation of a website for SNCF.

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Education

  • Bachelor's Degree in Computer Science
    IUT Charlemagne Nancy
    Formation solide en développement logiciel (front-end, back-end), administration de bases de données et gestion de systÚmes et réseaux. Capacité à analyser les besoins, à concevoir et déployer des solutions informatiques.

Skill set

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