Hi, I'm Antoine Gonthier

Welcome to my site. I'm a 22-yo mobile engineer between Paris and Dublin, with 5+ years of experience building consumer apps. I build high-quality iOS and Android apps used by millions of people.

Stack

  • flutter
  • dart
  • firebase
  • gcp
  • swift
  • kotlin
  • react
  • vue
  • mongodb
  • redis
  • postgres
  • nodejs
  • js

Wellnotes

Solo Founder·2025.02 - Present

80.000+ users

  • Student app with 1,000+ ratings at 4.6 stars.
  • Ranked on average in the top 100 of the App Store in France.
  • $30K ARR.

App Store

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APP STORE FRANCE Top 100 on average

AtClub

Advisor to the CTO·2025.07 - Present

1.000.000+ userssource: AppMagic

  • Advising the CTO on engineering and product for AtClub, a social app to find sports partners.
  • Advising on the Flutter and Firebase architecture of the app.

App Store

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Trophy
APP STORE FRANCETop 20 Social Networking (source: AppMagic)

Vibes Widget

Founding Engineer·2023.08 - 2025.11

3.000.000+ users

  • Founding member of a social network popular in Japan, top of the App Store charts in 30+ countries.
  • Built and deployed the entire Android app.
  • Built and maintain the iOS versions.
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APP STORE #2 Social Networking in Japan and FranceAPP STORE #2 Social Networking in Japan and FranceAPP STORE #2 Social Networking in Japan and France
APP STORE · GOOGLE PLAY Top charts in 30+ countriesAPP STORE · GOOGLE PLAY Top charts in 30+ countries

Dreamoji

Founding Engineer·2024.09 - 2025.01

300.000+ users

  • Shipped an app generating Genmoji-style AI emojis before iOS 18 launched.
  • Built the entire Android app.

Fhreads

Open Source·2023.07

  • Built a fully functional clone of Threads in Flutter and Firebase, 24 hours after Threads launched.
  • The most-starred Flutter Threads clone on GitHub (130+ stars), cloned by tens of thousands of developers.
  • Went viral in developer communities: 61K+ reach and 600+ reactions on a single Facebook post.

github.com/Antoinegtir/fhreads-meta

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THREADS Most viral open-source repo on the Threads app

ReBeal

Open Source·2023.06

  • Built a fully functional clone of BeReal in Flutter and Firebase in 48 hours.
  • The most-starred BeReal clone on GitHub, across all languages (66 stars, 16 forks).

github.com/Antoinegtir/bereal-cloneMedium article

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Kams

Solo Founder·2021.12 - 2023

  • Launched my first social network at 16. It did not take off, but I learned a lot.

App Store

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