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Ethan SelleronES

Ethan Selleron

Mobile Developer | React Native | iOS | Android

€475/day
4 projects
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Ethan

👋 Hi!

My name is Ethan, a full-stack mobile developer specializing in **React Native**. My strength lies in transforming an idea (sometimes still vague) into a **concrete, fluid, and reliable iOS & Android application**, ready to be published on the App Store and Google Play. 🚀

💡 What I do
For over 3 years, I've helpedstartups, SMEs, and associationslaunch or improve their mobile and web applications. I work with a quality-oriented approach:TDD (unit tests), CI/CDfor rapid deployments, and transparent follow-up through **regular demos**.

🔧 Tech Stack

- React Native / Expo
- TypeScript / Node.js
- Firebase / Supabase / AWS
- CI/CD (GitHub Actions, GitLab)
- Jest (Unit Tests & TDD)

🌟 Some notable achievements

🚗 Hiflow (Freecars): Logistics mobile app for carriers,+30,000 downloadsand10,000 tripsassigned per month.
🌀 Blendy: Dating app with real-time chat and intelligent matching.
🌙 Moonz: Astrological dating app, **+100,000 downloads**, crash rate reduced by **30%**.
📱 Okali: Mobile & web platform to simplify business processes.
💖 Asmae (NGO): Educational game in escape game mode to raise children's awareness of their rights.

🔥Why work together?

**Clarity and trust**: you always know where we stand, with continuously testable versions (TestFlight / Play Console).

**Technical reliability**: tested, optimized code designed to last.
**Responsiveness**: available 7 days a week, I respond quickly and adapt to your pace.

👉 If you want a technical partner who combines rigor, transparency, and closeness, let's discuss your project.
  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Basic

Remote only
Primarily works remotely

Experience

  • Hiflow
    Mobile Developer React Native
    TRANSPORTATION
    June 2025 - Today (1 year)
    Paris, France
    Development and evolution of the Hiflow mobile application**, used by **thousands of carriersfor automotive logistics (**+30,000 downloads** and+30,000 trips assigned**each month**).

    Design and optimization of complex business flows(transport and logistics), withrobust and scalablelogic.

    Unit tests(**TDD**) to ensurecode qualityand **reliability**.

    Refactoringand technicalmodernization(React Native/ **TypeScript**, library updates).

    Continuous improvement of the architectureto ensure **readability**, **maintainability**, and **high performance**.

    Management ofiOS / Androidissues and support for **product evolutions**.
    React Native Typescript TDD Mobile Development
  • Blendy
    Fullstack Developer
    SOCIAL NETWORKS
    December 2024 - January 2025 (1 month)
    Paris, France
    Project for the complete development of a mobile dating applicationwithreal-time featuresand **rapid deployment**.

    Development of the application from scratch with React Native (Expo)**, **modular architecture**, and **full integration with Supabase(authentication, data, edge functions).

    Implementation of an **instant messaging system**, **intelligent matching**, and **targeted notifications**, ensuring a good balance between **performance and scalability**.

    Deployment on the App Store and Play Store**, with **configuration of testing environments(**TestFlight, Play Console**) for continuous client validation.

    Writing of upstream unit tests (TDD)for authentication, message sending, and matching logic.

    **Client support at every stage**: **frequent demos**, **proactive follow-up via testing environment and weekly feedback**.
    React Native Typescript Supabase Fullstack TDD
  • OKALI
    Fullstack Developer
    BANKING AND INSURANCE
    January 2024 - February 2024 (1 month)
    Paris, France
    Complete backend refactoringandfront-end optimizationof abanking B2B platform**, in a demanding context of **high performanceand **reliability**.

    Modernization of the advanced search modulewithdynamic filters**, improving the **user experienceon **transactional listings**.

    Integration of Algoliaas a search engine, with aresponse time**<100 ms** for complex queries.

    CI/CD with GitHub Actionsforautomated deploymenton asecure AWS infrastructure**, including **an isolated testing environmentfor continuous validation.

    Writing unit testsoncritical components(forms, filter logic, conditional display).

    Agile collaboration**: **weekly follow-up**, **regular demos**, and **real-time adjustmentswith the client.
    React.js Typescript Amazon Web Services Github Actions TDD

Reviews

5.0

Out of 4 ratings

J

Jonathan

Blendy

Reviewed on 2/11/2025

This was my second project with Ethan, and I am still as satisfied with the quality of his work. I recommend him.
J

Jonathan

Blendy

Reviewed on 1/15/2025

I hired Ethan to develop the first version of a mobile application on iOS and Android. I was satisfied with his work, his communication, and his proactive suggestions. I recommend his profile.

Recommendations

Souheil B.SB
Oriane SaloméOS
GM
+2
Souheil B. and 4 other people have recommended Ethan

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Education

  • Expert in Information Technology Degree
    Epitech
    • 5ème année / Cursus Bac +5 • Gestion de projet • Anglais • Réalisation de plusieurs projets en C, C++, React Native, React.js, Vue.js • Découverte de divers langages orientés objet durant mes précédents stages

Skill set

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