Freelancer profile translated to English.
Back to original languageAbout Matthias
Mobile Developer | Flutter | iOS & Android
Looking for a **Flutter developer**?
Want to develop an **iOS / Android mobile application**?
You've come to the right place.
I am a developer with over 7 years of experience and aspecialist in iOS & Android developmentusing Flutter.
I have worked in various sectors such as healthcare, industry, education...
I have collaborated with companies such as Macif, Ramsay Santé, Berger-Levrault, ABB France, UCLy...
I hold the following certifications:
- Flutter/Dart Application Development Certification
- iOS Application Development Certification
I am able to:
- Design, develop, and maintain features in line with business needs
- Redesign mobile applications
- Migrate native applications to Flutter
- Participate in the writing of detailed technical specifications
- Communicate with UX/UI design teams to ensure adherence to Android and Apple design guidelines.
- Develop mobile applications in Flutter
- Maintain mobile applications
- Implement CI/CD
- Implement software architectures such as MVC, MVVM, VIPER, Clean Architecture
- Write technical documentation
- Perform unit tests to ensure code quality
- Participate in refactoring, continuous improvement, and code review contribution
- Deploy to the App Store and Play Store
- Deploy a PWA version to a web server
As a mobile developer, I am committed to producing quality code so that your users do not encounter an application full of bugs.
I also place great importance on transparency with my clients.
I send a daily report to my clients at the end of the day on all the tasks I have performed.
Do you have a project?
Contact me directly through the platform.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km), Nantes (up to 50km), Marseille (up to 50km), Lyon (up to 50km), Bordeaux (up to 50km)
Experience
- MACIFLead Flutter DeveloperBANKING AND INSURANCEMarch 2025 - Today (1 year and 3 months)Niort, FranceMacif is a major player in insurance in France. As part of its digital transformation, the company is investing heavily in its mobile solutions, used by over 1.5 million policyholders.In 2025, I joined the mobile team as Lead Flutter Developer. I was responsible for technical guidance and the quality of development for the iOS & Android mobile application.We worked using agile methodology within a squad of 10 people composed of:• 4 Flutter developers• 1 QA tester• 1 UX/UI Designer• 2 Product Owners• 1 Data Analyst• 1 Scrum MasterI contributed to the following developments:• Memory optimization of application resources by 30%, improving stability on entry-level devices• Project refactoring into clean architecture for efficient code maintenance• Coaching and upskilling Flutter developers on best practices: Clean Architecture, Clean Code, unit tests, Bloc, Provider & MVVM patternsAs Lead Developer, my responsibilities included:• Technical leadership and developer support (pair programming, live coding, mentoring)• Maintaining a high level of quality through continuous integration and automated tests• Contribution to the functional roadmap and technical prioritization with POs and the Scrum Master• Development and maintenance of the iOS and Android mobile applicationTechnical Context• Flutter• Dart• Clean Architecture• BloC• Provider• GetIt• RxDart• Dartz• Drift• iOS• Android• Java• Swift (interoperability via Flutter)• CI/CD• Unit tests• Automated tests• GraphQL• SQL• DTO• Design System• JIRA• Agile methods (Scrum)
- Berger-LevraultFlutter DeveloperSOFTWARE PUBLISHINGJune 2024 - December 2024 (7 months)Limonest, FranceBerger-Levrault is a company in the IT services and consulting sector.Its objective is to publish trusted software solutions for more responsible digital transformation.The company has up to 2000 employees worldwide.I joined the Flutter mobile development team in 2024.I participated in the maintenance of the Carl Touch mobile application.We were organized in a squad of 6 people. My squad consisted of:- 3 Flutter developers- 1 product owner- 2 testersI contributed to the following developments:- Optimization of memory resources by 30%- 80% increase in display fluidity for substantial data streams (+10,000 articles)As a Flutter developer, my responsibilities included:- Maintenance of the iOS and Android mobile application- Support for other Flutter developers: pair programming, code reviews- Consideration of quality requirements according to a continuous integration and automated testing processHere is the link to my client's website: https://www.berger-levrault.com/fr/Technical Context:- Flutter- Clean architecture- Mobile application development- iOS- Android- Dart- MVC- Model-View-ViewModel- Unit testing- Agile methods- Programming- RxDart- JIRA- Dartz- Java- Drift- Provider- Algorithms- SQL- BloC- GraphQL- Mobile applications- GetIt- Mobile application- Clean Code- DTO- Design system- Android Development- iOS Development- Flutter Development- iOS Mobile Development- Android Mobile Development- iOS Application Development- Android Application Development- Flutter Application Development- iPhone / iPad Mobile Application Development- Android Mobile Application Development- Flutter Mobile Developer- Flutter Mobile Developer- iOS Flutter Developer- Android Flutter Developer- Flutter Dart Developer- Flutter Expert
- Ramsay SantéFlutter DeveloperHEALTH AND WELLNESSMarch 2023 - June 2024 (1 year and 3 months)Lyon, FranceRamsay Santé is the European leader in private healthcare and primary care with 38,000 employees and 10,000 practitioners serving 12.6 million patient visits.They have 488 facilities across 5 countries.I joined Novances IT - the ESN in charge of the project - as a Lead Flutter Developer in 2023 for a period of one and a half years.I participated in the development of the PWA application called Senapps.We were organized in a squad of 7 people.My squad consisted of:- 1 DevOps- 2 Flutter developers- 1 back-end developer- 1 product owner- 1 designerI contributed to the following developments:- 80% optimization of the patient journey- A gain of 2 hours per day for practice secretaries.As Lead Flutter Developer, my responsibilities included:- Training other developers in the squad on the Flutter framework- Developing the PWA application in Flutter- Supporting other Flutter developers: pair programming, code reviews- Integrating the design system- Creating specific widgets for the medical field (tooth selector, timeline of injections and events during surgery).I also worked on the backend using FastAPI (Python) on:- Developing the video conferencing API- Developing the intervention APIHere is the link to the application: https://app.senapps-med.fr/Technical Context:- Flutter- Clean architecture- Mobile application development- iOS- Android- Dart- S3- Redis- MVC- Model-View-ViewModel- Unit testing- Agile methods- Programming- RxDart- JIRA- Dartz- Java- Drift- Provider- Algorithms- SQL- BloC- GraphQL- Mobile applications- GetIt- Mobile application- Clean Code- DTO- Design system- Android Development- iOS Development- Flutter Development- Flutter application development- PWA- Progressive Web App- Flutter Dart Developer- Flutter Expert
Reviews
Management
Directeur - HAPPYVISIO
Reviewed on 12/22/2025
Excellent support (advice, execution, respect for deadlines)!
C
Christophe
CF
Reviewed on 1/21/2025
A big thank you to Matthias for his excellent work on developing my mobile application. He delivered a fluid, efficient, and perfectly adapted solution in record time. His professionalism and mastery of Flutter made all the difference. I highly recommend him!
Recommendations
CL
CF
+3
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Education
- ManagementIGENSIA2018IGENSIA Alternance est spécialisé depuis 45 ans dans l’enseignement en alternance des métiers du tertiaire, avec une approche pédagogique en constante évolution pour répondre aux besoins du marché du travail et aux attentes des apprenants. IGENSIA Alternance possède 5 CFA dans 3 villes : Paris, Lyon et Toulouse. J'ai suivi une formation sur le management.
Certifications
- iOS Application Development CertificationOPEN CLASS ROOM2022
- Flutter/Dart Application Development CertificationUDEMY2019