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Baptiste PateyBP

Baptiste Patey

Expert Flutter & Mobile | App iOS, Android & Web

€450/day
2 projects
Caen, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Baptiste

Mobile and Web Experiences Developer


I'm not just here to write lines of code. I'm here to make your app **downloaded, used, and profitable**.

I learned mobile development the hard way, by creating **my own applications**. I designed, developed, and launched several apps, including a mobile game that has now surpassed **250,000 downloads**.

This entrepreneurial experience changes everything for you. When I develop your app, I don't just think "**technical**". I think "**user**", "**retention**", and "**business model**". I know what makes an app succeed or fail on the stores because I've lived it! And I've learned from my failures as well as my successes.

Today, I put this dual skill (Technical Expertise + Product Vision) at the service of my clients.

Here's how we can work together

1. From Idea to Store (Full Cycle)
You have the concept, I'll take care of the rest. I'll handle the architecture, Flutter development (iOS, Android, Web), connection to services (Firebase, API, ...), and publishing. I'll advise you **every step of the way**!

2. Rescue & Optimization
Do you have an app that crashes, is slow, or is impossible to maintain? I'll step in to audit the code, fix problems, and get the project **back on track**!

3. Strategic Consulting
Before even coding, I'll help you validate your choices. Whichtech stack?What business model? What launch strategy? With my corporate and indie experience, I'll help you build a realistic roadmap aligned with **your vision**!

My promise is simple
I invest in your projectas if it were my own**. I will always tell you **the truthabout what is feasible or risky. No commercial "**yes**" to please you, but atrue partnership for success 🙂
  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Fluent

Remote only
Primarily works remotely

Experience

  • Projet personnel
    Flutter Developer - Letter Game Mobile (Wordle/Quordle type)
    VIDEO GAMES AND ANIMATION
    January 2022 - March 2024 (2 years and 3 months)
    Managed the complete lifecycle of the app [App Name], from initial idea to its transformation into a profitable and user-acclaimed product.

    As the founder and sole developer, my responsibilities covered both product strategy and technical execution.

    Strategic and Commercial Missions:
    • Defined monetization strategy (rewarded ads, premium ad-free version).
    • Launched and marketed on the App Store and Google Play Store, including App Store Optimization (ASO) to maximize visibility.
    • Analyzed user data to guide future developments and improve retention.
    Technical Missions:
    • Developed the cross-platform application entirely with Flutter.
    • Implemented a robust architecture to handle complex game logic.
    • Integrated monetization SDKs.
    Key Results:
    • 250K downloads.
    • Significant revenue generation.
    • Reached Top 3 in the "Word Games" category on the Play Store.
    • Average rating of 4.5/5 based on 7.5K user reviews.
    Technical Environment:Flutter, Dart, Firebase, Applovin, etc...
  • NextCig
    Flutter Developer - Gradual Smoking Cessation Planner
    HEALTH AND WELLNESS
    April 2023 - September 2023 (5 months)
    Recruited by the startup "NextCig" to develop their innovative Flutter application, based on a gradual smoking reduction method.

    Unlike traditional approaches, the app doesn't aim for abrupt cessation but generates a personalized schedule of allowed smoking slots, with decreasing frequency over time to ensure a smooth withdrawal.

    Missions and Responsibilities:
    • Designed and developed the scheduling algorithm, generating a personalized consumption calendar that adapts to the user's profile and progress.
    • Implemented a complex calendar-like interface for visualizing allowed slots and tracking program progress.
    • Set up an advanced notification system to alert users as allowed slots approach and congratulate them on reaching new milestones.
    • Created the initial onboarding flow to set up the user's profile (habits, goals) to generate the first schedule.
    Results for the Client:
    • The success of this less "radical" approach translated into strong engagement and concrete results for the startup:
    • Delivered the application on iOS and Android within the deadlines, enabling the official launch of the "NextCig" method.
    • Average rating of 4.7/5, with numerous positive comments on the method's innovative nature.
    Technical Environment:Flutter, Dart, Firebase (Firestore for schedules, Auth), Provider/Riverpod, table_calendar (schedule management), Local Notifications, etc...

Reviews

5.0

Out of 2 ratings

J

Jordan

Création, configuration et validation des comptes Apple Developer et Google Play Console - Joyia Technologies

Reviewed on 3/31/2026

I highly recommend Baptiste. He assisted me with the entire setup of Apple Developer and Google Play Console accounts, taking full responsibility and completing it in a very short timeframe. He was very available, responsive, and capable of finding quick solutions to roadblocks. You can tell he doesn't just focus on the technical aspects; he understands the challenges and drives things forward effectively. A truly reliable, efficient, and results-oriented partner. I would hire him again without hesitation.
M

Margaux

Margaux Ben Soussan

Reviewed on 10/27/2025

Baptiste was exceptional from start to finish. He didn't just develop the app in Flutter; he truly co-built the project with me. Always proactive, he supported me through the entire technical side (Apple, Google, Firebase, AI...) with incredible availability and rigor. Thanks to him, the project I had in mind evolved even further, beyond my expectations. The result is top-notch, and humanly, he's a trusted partner. I couldn't have asked for better, and I look forward to continuing to work with him on the next steps of this project and future ones.

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Education

  • École 42
    École 42
    2019

Certifications

Skill set

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