I am an entrepreneur passionate about digital tech, with 25 years of experience designing, developing and launching innovative web and mobile projects. I have worked on applications and platforms using Flutter, Node.js and React, leading teams and delivering high-quality products. Today, I focus on full-stack development, best practices, mentorship and knowledge sharing. I am motivated by technical challenges, professional ethics and a drive to continuously improve my skills and those of my collaborators.…

Ge Geoffrey Petain

I am an entrepreneur passionate about digital tech, with 25 years of experience designing, developing and launching innovative web and mobile projects. I have worked on applications and platforms using Flutter, Node.js and React, leading teams and delivering high-quality products. Today, I focus on full-stack development, best practices, mentorship and knowledge sharing. I am motivated by technical challenges, professional ethics and a drive to continuously improve my skills and those of my collaborators.…

Available to hire

I am an entrepreneur passionate about digital tech, with 25 years of experience designing, developing and launching innovative web and mobile projects. I have worked on applications and platforms using Flutter, Node.js and React, leading teams and delivering high-quality products.

Today, I focus on full-stack development, best practices, mentorship and knowledge sharing. I am motivated by technical challenges, professional ethics and a drive to continuously improve my skills and those of my collaborators.

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Skills

Experience Level

Flutter
Expert
JavaScript
Expert
TypeScript
Expert
Node.js
Expert
React JS
Expert
Google Cloud
Intermediate
CSS
Intermediate
AngularJS
Intermediate
Docker
Beginner

Language

French
Fluent
English
Fluent

Work Experience

Mobile App Developer
March 1, 2025 - Present
Development of a vocabulary-learning mobile app (56,000 words with audio); full-stack front-end (mobile) and back-end; automated deployment; stack includes Flutter, Firebase (Auth, Firestore, Messaging), Google Cloud (Cloud Functions, Translate, Text-to-Speech); in-app purchases; multilingual support; offline mode; notifications; gamification and user progression.
Directeur des opérations / Consultant technique at Proximity BBDO Paris
July 1, 2011 - October 17, 2025
Budget evaluation in pre-sales; management of production teams (80 developers); project qualification, planning and monitoring; technical consultancy on multiple projects (Smart, Carte Noire CRM, Panasonic, etc.).
Directeur technique adjoint en charge des équipes Front at Proximity BBDO Paris
February 1, 2007 - October 17, 2025
Creation and management of the Frontend team (17 people); development of frontend for campaigns; recruitment, training, and coordination of frontend projects.
Web Developer / CTO at Planet Interactive
November 1, 2004 - October 17, 2025
Creation and development of websites and web applications for clients; led frontend/backend development and collaborated with designers to deliver interactive digital solutions.
Full-Stack Flutter Developer at VocZilla
January 1, 2025 - Present
Application mobile d'apprentissage du vocabulaire anglais (56 000 mots avec audio). Développement complet (frontend mobile + backend) avec déploiement automatisé.
Web Developer at Planète Interactive (Isobar)
November 30, 2004 - October 17, 2025
Développement web pour des projets majeurs (La Peyre, Virgin Mega, Heineken, TF1, etc.). Gestion d’équipe Front-end (17 personnes).
Director of Operations / Technical Consultant at BBDO Paris
July 31, 2011 - October 17, 2025
Gestion des équipes de production techniques (80 développeurs); évaluation budgétaire et avant-vente; définition et suivi des projets.

Education

Add your educational history here.

Qualifications

OPQAST Certification
January 11, 2030 - October 17, 2025
Certified English Professional
January 11, 2030 - October 17, 2025
OPQUAST Certification - Certified English Professional (English 360°)
February 1, 2023 - October 17, 2025
CEFR A2+ (English proficiency)
January 11, 2030 - October 17, 2025

Industry Experience

Software & Internet, Media & Entertainment, Professional Services, Financial Services, Retail
    paper Flutter-now : Author of a blog dedicated to Flutter and cross-platform mobile development.
    • Regularly publish technical articles and in-depth tutorials.
    • Write with a focus on clarity, performance, and mobile development best practices.
    • Create content aimed at helping the community grow their expertise in Flutter and Dart.
    • Conduct continuous research and monitoring of the mobile ecosystem (widgets, packages, UI/UX, architecture, etc.).
      https://www.twine.net/signin
    paper Voczilla

    Mobile application for learning English vocabulary (5,600 words with audio).
    Complete development (mobile frontend + backend) with automated deployment.
    Tech stack and key features:

    • Flutter, Firebase (Auth, Firestore, Messaging), GCP (Cloud Functions, Translate, Text-to-Speech)
    • In-App Purchases, multilingual support (l10n), offline mode, notifications
    • Gamification: user leaderboard and progress tracking
    • Speech recognition and pronunciation testing
    • Custom word list creation
    • Backend: Node.js with Docker and Google Cloud deployment
    • CI/CD: Fastlane integration for app stores (iOS, macOS & Android)
      https://www.twine.net/signin