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Geoffrey MarizyGM

Geoffrey Marizy

Android Developer (Kotlin) & Flutter

€550/day
2 projects
Paris, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Geoffrey

Mobile application developer (Android & Flutter) with 15 years of experience, I acquired my expertise with leading teams in Paris: LeBonCoin, Meetic, Molotov.tv, Happn, BeReal...

I often work with startups ranging from early stage to scale-up on the following missions:


►Team Augmentation

Whether it's to cope with understaffing by joining a feature team or for a temporary need for specific skills (interim lead dev, training, ...), I am operational on:
- 📱 Flutter and Android Development (Kotlin, coroutines, Jetpack Compose ...).
- 📐 Architecture: Clean architecture, MVVM, BLoC.
- 🏭 Industrialization: git, code reviews, tests, CI/CD.
- 🎯 Agile methods: SCRUM, Kanban, release train.
- 🤝 Collaboration tools: Atlassian Jira, Figma, Notion, ...


►Launching a New App

I can take charge of developing a mobile application from conception to production on Google Play and the App Store.
- 💡 Conception: user experience design, lean startup.
- 📐 Architecture: my favorite area, most of my missions specifically concern setting up or redesigning architecture.
- 🏗️ Development: from native apps (Kotlin / Android) or cross-platform (Flutter), as well as back-end (micro-services, lambdas, serverless ... as needed).
- And the ➕: alternating freelancing and entrepreneurship, I am interested in business beyond technology; my approach is ROI and added value oriented.
  • English

    Fluent

  • French

    Native or bilingual

Can work on-site
Paris (up to 30km), Grenoble (up to 30km), Chambéry (up to 30km), Annecy (up to 30km)

Experience

  • Hush
    Flutter Developer
    ENTERTAINMENT AND LEISURE
    April 2025 - Today (1 year and 2 months)
    Re-architecting the application to improve delivery capability, after organic growth of the codebase made changes complex and costly.
    Startup Reactive Programming Flutter Firebase Architecture
  • strangrs.com
    CTO
    ENTERTAINMENT AND LEISURE
    May 2024 - January 2025 (8 months)
    Rewriting the POC into a scalable and maintainable application. Adopting Flutter for mobile and web - including the back-office - to optimize code reuse and reduce costs.





    Flutter Typescript Firebase Firestore Clean Architecture Design System
  • Mojito.party
    CTO
    SOCIAL NETWORKS
    April 2022 - March 2024 (2 years)
    Designing and developing a social network from scratch, from UX to store publication. Front-end with Flutter, back-end with microservices and Lambda functions.
    Flutter User Experience Design Design System Firebase Architecture

Recommendations

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Former user and 4 other people have recommended Geoffrey

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Education

  • IT Engineer
    ISEP
    2010

Skill set

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