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Romain GréaumeRG

Romain Gréaume

Lead Mobile Developer

€500/day
Montréal, CA
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Romain

Lead Mobile Developer with over 5 years of experience, specializing in Flutter and iOS (Swift/SwiftUI).
I design robust mobile applications by leveraging strong expertise in architecture, security, performance, and best practices. I have contributed to applications used by millions of people daily, both in France and internationally.
Based in Montreal, I currently hold the role of Lead Mobile Engineer where I manage iOS and Flutter teams on large-scale e-commerce projects, combining technical quality, mentoring, and concrete delivery.
  • French

    Native or bilingual

  • English

    Native or bilingual

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

Experience

  • Base1 Inc.
    Lead Mobile Developer
    E-COMMERCE
    September 2024 - Today (1 year and 11 months)
    Montréal, Canada
    - Technical lead for iOS and Flutter teams on large-scale e-commerce projects
    - Design of robust mobile architectures (MVVM, VIPER, Clean Architecture, BLoC) and implementation of best practices (automated testing, functional programming)
    - Development of strategic features from scratch and UIKit → SwiftUI migration
    - Mentoring, skill transfer, and cross-functional collaboration with Product, Design, Front-end, and Back-end teams
    SwiftUI Flutter Tech Lead Software Architecture Mentoring
  • Eyenation
    Lead Mobile Developer
    TELECOMMUNICATIONS
    October 2025 - May 2026 (7 months)
    Montréal, Canada
    - Audit of the existing application
    - Security audit
    - Update of iOS/Android/Flutter/Dart SDKs for an existing application (application not updated for 4 years)
    - Deployment on Apple and Google stores
    - Estimation for potential new features
    - Consulting, monitoring, and project management
    Flutter Dart Security Audit Audit freelance
  • EXFO
    Mobile Developer Designer
    TELECOMMUNICATIONS
    May 2024 - September 2024 (4 months)
    Montréal, Canada
    - Flutter feature development on an IoT application (Bluetooth Low Energy, Wifi, equipment pairing) and automated testing
    - Technical audit of an existing application: analysis, performance, security, architecture and refactoring proposals
    - Skill transfer to internal teams
    Clean Architecture Dart Flutter Security Audit Mobile Development

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