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Jocelyn GriselleJG

Jocelyn Griselle

Lead Mobile Developer Flutter

€500/day
Nantes, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Jocelyn

Developer with 10 years of varied experience on the backend and mobile📱, in startups and large groups, I am currently focusing on developing iOS 🍎 and Android 🐸 applications with Flutter as a freelancer.

"Test, Develop, Improve."
I put all my attention into coding while respecting good software development practices 💎 🏗 ⚖️ (tests, SOLID principles, clean architecture). I also try to improve myself every day as a developer (monitoring, training, meetups) to provide top code quality ✅.

"🧔‍♀️ Human. 🛒 Product. 🏗Code. In that order."
Developing is good, but without a team and without a product, we cannot achieve great things. I attach even greater importance to teamwork values 🤝, to transmission and sharing ↔️, as well as to respecting the product and the value we can put into users' hands. Coding is a means, not an end.

Do not hesitate to contact me for any requests! ✉️
Jocelyn
  • French

    Native or bilingual

  • English

    Fluent

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

Experience

  • Ynstant
    Lead Mobile Developer
    TRANSPORTATION
    May 2024 - May 2025 (1 year)
    Paris, France
    Lead mobile developer for the Ynstant carpooling application in a team of 5 developers.

    Redesign of state management with Bloc
    Redesign of navigation with Gorouter
    Addition of an in-app chat with the GetStream SDK
    Addition of error management monitoring with Datadog
    Implementation of Applinks / UniversalLinks
    Implementation of a Design System with Widgetbook
    Implementation of e2e tests with Maestro
    Flutter Firebase Python FastAPI
  • SNCF Connect
    Lead Mobile Developer
    TRANSPORTATION
    August 2021 - Today (5 years)
    Nantes, France
    Development of the Sncf Connect mobile application on Android and iOS with Flutter 🦋 📱.
    - Development of the UI for favorites, promotions, and advertising
    - Integration of native features like geolocation and advertising with Google Admob
    - Monitoring of battery usage in a Green IT approach 🌱

    In addition to their role as a developer, the mobile lead is responsible for reviewing/validating MRs 👀, ensuring adherence to best practices (testing / architecture / code quality) 💎 🏗 ⚖️, and monitoring the apps (Firebase / Instana) 🩺 📈
    Flutter Dart iOS Android
  • Helios
    Flutter Mobile Developer
    BANKING AND INSURANCE
    January 2021 - July 2021 (6 months)
    Nantes, France
    Development of the Helios mobile application, an ecological neobank on Android and iOS.

    - Screen development
    - Analytics implementation
    - CI/CD implementation on Bitrise
    - Integration with native SDKs
    Dart Flutter

Recommendations

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Education

  • Computer and Telecommunications Engineering Degree
    School of Engineering of Rennes
    2011

Skill set

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