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Sébastien CARPINSC

Sébastien CARPIN

Supermalter

Lead Android Developer

€700/day
2 projects
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sébastien

Senior Android Developer with over 15 years of freelance experience.
I have carried out mobile development projects in various sectors (banking, media, national lottery, insurance, sports betting, e-commerce, transport, etc.).
I am currently working as a Senior Android Lead Developer.
My clients appreciate my commitment to quality and deadlines, as well as my rapid adaptability.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 50km)

Experience

  • Orange Bank
    Tech Lead Android
    BANKING AND INSURANCE
    June 2018 - Today (8 years)
    Montreuil, France
    Complete refactoring of the Orange Bank Android application - 1,000,000 users - Play Store Rating: 4.5 – voted best banking app in 2022 in France.
    Implementation of technical stack (jetpack compose, coroutines, flow, hilt, navigation, retrofit, room, unit tests, UI tests, etc.).
    Implementation of clean architecture with modularization (data/domain/mvvm).
    Offline cache strategies (room, datastore).
    Implementation of security layers (encryption, authentication, certificate pinning).
    Implementation of Material Design.
    Firebase integrations (push notifications, analytics, crashlytics, remote config).
    CI setup (jenkins, automatic tests, detekt, sonar, google play deployments + firebase app distribution).
    Led a team of 7 developers using agile / safe methodology.
    Kotlin Jetpack Compose MVVM Android Clean Architecture Material Design Coroutines Firebase Hilt modularization Jenkins Unit Tests Mockk TDD
  • SNCF Mobilités
    Android Architect
    TRANSPORTATION
    February 2017 - May 2018 (1 year and 4 months)
    Paris, France
    Development of the Android application for managing the dematerialized Navigo Pass.
    Development of the Android application for controlling train tickets used by SNCF agents.
    Implementation of clean architecture and modularization.
    Performance optimizations (offline with SQLite DB), security aspects, and NFC feature integration.
    CI setup (jenkins / sonar / automated tests on mobile farm with test reports).
    Kotlin Clean Architecture Room RxJava Dagger2 Retrofit Gradle Espresso Unit Tests NFC Material Design Mockito
  • FDJ
    Tech Lead Android
    PRESS AND MEDIA
    June 2013 - January 2017 (3 years and 8 months)
    Boulogne-Billancourt, France
    Complete overhaul of the Parions Sport Point of Sale Android application - High traffic application with 2,000,000 users - Play Store Rating: 4.5
    Multi-sport betting through a cart, sports betting consultation in offline mode with an embedded mobile database, synchronization strategies, ticket dematerialization for bets via QR-Code, ...
    Development of screens for mobile and tablets.
    Developments and improvements on the Loto and Euromillions applications (development of a new game "My Million", scanning of game receipts with results via the application, in-app access to the player account, ...).
    Led a team of 6 developers in an agile setup.
    Android SQLite Retrofit Clean Architecture Java REST API Unit Tests Jenkins

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