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Guillaume MamessierGM

Guillaume Mamessier

Senior Android Developer | Kotlin | Compose

€600/day
Nantes, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Guillaume

I am an Android developer based in Paris for 6 years, including 2 years as a Freelancer. I can work on new projects as well as take over an existing one. I am currently looking for new missions, feel free to contact me.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Nantes (up to 10km), Paris (up to 10km)

Experience

  • Decathlon Digital
    Senior Android Developer
    SPORTS
    January 2024 - Today (2 years and 4 months)
    Development of a new urban mobility application

    • Development of new features and UI in agreement with the product owner and the graphic designer
    • Collaboration with iOS and backend developers
    • Recent technical stack
    • Code review with other team developers
    • Consideration of testing and client feedback
    • Participation in agile rituals (retrospective, stand-up, sprint planning, refinement)

    Technical environment: Android, Kotlin, Compose, Clean Architecture, Coroutines, Flow, MVVM, Web services, Gradle KTS, Json, Git, Gson, Crashlytics, Android Studio
    Kotlin Android Jetpack Compose Coroutines Clean Architecture Flow MVVM Gradle KTS
  • ACCOR
    Android Developer
    HOSPITALITY
    April 2021 - January 2024 (2 years and 9 months)
    Issy-les-Moulineaux, France
    Maintenance and improvement of the Accor All Android application

    • Analysis of existing code
    • Development of new features and UI in agreement with the product owner and graphic designers
    • Work in a feature team, mainly in the team managing the entire booking flow
    • Migration of the architecture to MVVM
    • Migration of screens to Compose
    • Code review with other team developers
    • Consideration of testing and client feedback
    • Participation in agile rituals (retrospective, stand-up, sprint planning, refinement)

    Technical environment: Android, Kotlin, Compose, Clean Architecture, Coroutines, Flow, MVPC, MVVM, Web services, Gradle, Json, Git, Gson, Crashlytics, Android Studio
    Kotlin Android compose Coroutines Dagger Retrofit GraphQL MVVM Flow
  • Orange Bank
    Android Developer
    BANKING AND INSURANCE
    July 2020 - April 2022 (1 year and 9 months)
    Montreuil, France
    Maintenance and improvement of the Orange Bank Android application

    • Analysis of existing code
    • Development of new features and UI in agreement with the product owner and graphic designers
    • Code review with other team developers
    • Consideration of testing and client feedback
    • Participation in agile rituals (retrospective, stand-up, sprint planning)
    Android Kotlin Coroutines Dagger 2 Retrofit Data binding MVVM MVP Web Services Gradle Json Git Gson Glide Crashlytics

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Education

  • Engineer in new technologies
    ECE Paris
    2014

Skill set (42)

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