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Larry GeromegnaceLG

Larry Geromegnace

Senior Flutter & iOS Developer

€590/day
5 projects
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Larry

🚀 **Flutter & iOS Developer with 15 years of mobile experience**, I help startups and SMEs build reliable, modern, and production-ready applications.

🔑 Core Skills:
  • Cross-platform Flutter Development (iOS, Android, macOS)
  • Firebase Integration (Auth, Firestore, Crashlytics, Analytics)
  • Design & UX: Material Design 3, dark/light mode, accessibility
  • Quality & Publishing: testing, CI/CD, App Store & Play Store releases
📌 Areas of Current Specialization:
  • Mobile Monetization (IAP, subscriptions, RevenueCat)
  • Optimization of user journeys and in-app business models
✅ I can create an application from scratch, or take over an existing project to stabilize/modernize/evolve it.

📍 Based in France, available for full remote or hybrid work
💶 Daily Rate: €550–€650 depending on the mission

Packaged Service Examples

App Store & Google Play Publishing
Full support: project setup, build generation, release, and guideline compliance.
👉 Starting from €150

Technical Audit of an Existing Flutter App
Codebase analysis, architecture recommendations, and concrete action plan for stabilization or modernization.
👉 Starting from €300

Flutter Prototype in 1 Week
Development of a functional MVP to test an idea (navigation, M3 design, local persistence).
👉 Starting from €800

Firebase Integration (Auth, Firestore, Crashlytics, Analytics)
Secure setup and documentation for your team's onboarding.
👉 Starting from €400
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 30km)

Experience

  • SNCF Connect
    Flutter Developer
    TRAVEL AND TOURISM
    October 2022 - Today (3 years and 8 months)
    Paris, France
    Description: Participation in application development within a feature team whose main mission is to provide information to travelers (traffic info, disruptions, cancellations, etc.).


    Tasks:
    • Addition of urban transport (buses, metros, trams, etc.) to the station timetable screen
    • Display of crowd levels on Île de France trains
    • Development of numerous components for the application's design system
    • Refactoring to better apply the technical architecture (BLoC) in the project
    • Bug fixing
    Flutter Dart BLoC Git Gitlab Jira
  • Zenly
    iOS Developer
    SOCIAL NETWORKS
    April 2022 - September 2022 (6 months)
    Paris, France
    Participation in application development within a feature team responsible for the search engine that allows users to find friends and discover new places based on those visited by their friends in the app.

    Tasks:
    • Redesign of part of the UI/UX in the search workflow
    • New features (search by category, creation of custom places, etc.)
    • Bug fixing
    • Refactoring
    Swift RxSwift MVVM Git Github Actions Jira
  • RATP Smart Systems
    iOS Developer
    TRANSPORTATION
    April 2019 - March 2022 (2 years and 11 months)
    Paris, France
    Within the Mappy entity of Ratp Smart System, participation in the development of Mappy's Mobile applications in collaboration with backend teams (maps and POI), as well as development of SDKs for deploying Mappy technology to its partners.


    Tasks:
    • Development of new features in the Mappy application
    • Addition of CarPlay support
    • Modernization of CI (migration from Jenkins to Gitlab-ci)
    • Modernization of build tools (migration from rakefile to Fastlane)
    Swift Objective-C MVVM UIKit SwiftUI Git Gitlab CI Jira Scrum

Reviews

5.0

Out of 2 ratings

JohanJ

Johan

JoCorp

Reviewed on 8/4/2025

Responsive and relevant!
I

Ilian

FRECH

Reviewed on 5/21/2025

Recommendations

MA
Sylvain NeauSN
FU
+2
Maureen Alimi and 4 other people have recommended Larry

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Education

  • Master's degree in Computer Engineering
    Université Paris Est Marne-la-Vallé
    2009

Skill set

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