Freelancer profile translated to English.
Back to original languageAbout Mathis
Developer**Flutter** specializing in profitable mobile applications. 7 years of development withTech Leadexperience.
With a background in marketing and design, I have collaborated with various clients,from LIDL to innovative startups. My experience allows me to support your strategic decisions beyond technical development.
"Mathis is a very interesting asset in his ability to adapt thanks to a good mix of technical skills and understanding of business challenges" -Paul Chaintreuil, Project Manager at LIDL
Reference Projects:
What I Offer:
- Cross-platform development: iOS, Android, Web
- Product design: ideas → interfaces without prior mockups
- Complex integrations: APIs, WebSockets, real-time systems
- Strategic consulting: optimization & conversion
- Store deployment and evolutionary maintenance
Technical Stack:
- **Mobile**: Flutter, Dart, State Management (Riverpod, Bloc)
- **Backend**: Node.js, REST APIs, WebSockets, Firebase
My Differentiation:
✅ Rapid adaptability thanks to my versatility
✅ Business vision: problems → features that convert
✅ Creative autonomy: from idea to finished product
Available for technical support and product consulting.
Contact me to discuss your mobile project.
Website: melhor.fr
French
Native or bilingual
English
Fluent
Can work on-site
Lille (up to 50km), Paris (up to 50km), Toulouse (up to 50km), Rennes (up to 50km), Marseille (up to 50km)
Experience
- Mamie Jacotte
On Malt
Flutter Mobile DeveloperNovember 2025 - November 2025Maintenance and stabilization - Mamie Jacotte
Technical intervention to correct several major malfunctions affecting registration, family management, and the overall consistency of the application.Intervention context
The application had blocking issues in the onboarding process and account creation, leading to duplicates, incorrect associations, and unreliable navigation. The goal was to stabilize the existing base, make key flows reliable, and deliver a clean version ready for production.Missions performed
- Technical corrections and reliability improvements
- Correction of a navigation issue preventing some users from progressing normally through the steps
- Resolution of a bug generating multiple families for the same user
- Reworking internal logic causing inconsistent application behavior
- Correction of the Google Sign-In flow to prevent automatic creation of new families
- Improvement of several texts to make the journey clearer and more consistent
Testing and production deployment
- Complete verification of registration and login flows
- Data consistency check after corrections
- Final deployment on the stores
Support
Rapid intervention in an urgent situation, immediate project takeover, fluid communication, and continuous adjustments with the client.Result
Stabilized application, corrected user journeys, reliable account management, and successful production release.CEO Testimonial
"Absolutely perfect [...] Mathis was able to grasp and understand the project very quickly. Very good communication, adapted solutions, and exemplary responsiveness. Looking forward to collaborating again!" - Loïc BillambozTechnologies used
- FlutterFlow
- Firebase (Auth, Firestore)
- Google Sign-In
- MankindmeFlutter Mobile DeveloperHEALTH AND WELLNESSJune 2025 - August 2025 (2 months)
Peer-support application with intelligent matching - Social Impact Sector
Critical technical intervention on DEJA-VU, a platform connecting caregivers and care recipients with a matching algorithm. Rescue mission and finalization of the POC to enable the CEO to raise funds with a functional and convincing product.Intervention context
Non-functional application despite initial development. Emergency intervention to transform a failing POC into an exploitable MVP within tight deadlines for imminent fundraising.Missions performed
Complete technical reconstruction- Restored functionality of the FlutterFlow/Firebase architecture
- Developed the intelligent matching system for caregivers/recipients
- Completed user journey integration (profile, matching, communication)
Functional development- System for defining caregiver/recipient profiles with matching criteria
- Integrated chat for secure communication
- Video conferencing and appointment booking module
- Administration interface and user management
Strategic support- Overall UX improvement to optimize engagement
- Complete management of deployment and production release
- Technical consulting for product roadmap and scalability
Results achieved
*POC transformed into a functional MVPready for investor demonstration*Stabilized architecturewith a solid technical foundation for future evolutions*Deadlines metdespite complete project reconstruction*CEO empoweredwith technical understanding of the productTechnologies used
- **No-Code**: FlutterFlow
- **Backend**: Firebase (Firestore, Auth, Storage)
- **Integrations**: Video conferencing APIs, push notifications
- DoboxFull-stack Flutter DeveloperTECHApril 2025 - Today (1 year and 4 months)Lille, France
Multi-OS gaming launcher for interactive terminals - EdTech/Therapeutic Sector
Complete development of an educational gaming ecosystem deployed on autonomous Windows/Linux terminals. Complex project combining mobile, IoT, and cloud technologies for music therapy and interactive educational applications.Technical responsibilities
Complete system architecture- Multi-OS Flutter launcher (Windows/Linux) with custom interface
- Autonomous system: automatic terminal startup and application launch
- Centralized cloud architecture for content management and updates
Full-stack development- Main Flutter application with optimized touch interface
- QR code authentication system + mobile web interface
- WebSocket backend for real-time terminal-smartphone synchronization
DevOps & Distribution- Automated cloud deployment pipeline for simultaneous updates
- Management of terminals distributed across France
- Complete integration of Linux/Windows environments with performance optimizations
Technical challenges overcome
- **Native Multi-OS**: Flutter adaptation for embedded Windows/Linux environments
- **Real-time synchronization**: WebSocket between terminals and mobile interfaces
- **Cloud distribution**: automatic update system for 10+ deployed terminals
- **Complete autonomy**: automatic startup/shutdown without human intervention
Project impact
*10+ terminals deployedin France in specialized centers- **Complete ecosystem**: games, music, launcher, content cloud
- **Sectoral innovation**: new technological approach to music therapy/education
- **Simplified maintenance**: centralized updates in minutes
Technologies used
- **Frontend**: Flutter, Dart
- **Backend**: WebSocket, Cloud Storage, REST APIs
- **Infrastructure**: Linux, Windows, embedded systems
- **Tools**: Git, CI/CD, virtualized environments
Reviews
Recommendations
AP
SJ
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Education
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