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Gaël ThomasGT

Gaël Thomas

Mobile Developer | React Native | Fullstack

€300/day
4 projects
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Gaël

🦸‍♂️ Mobile & Full-Stack Developer

React Native · Expo · React · Next.js · Node.js

🚀 5+ years of experience in startups and on various projects
⚡ Quick adaptation, autonomous, used to dynamic environments
📱 iOS & Android mobile development, as well as Web & SaaS applications
🏗 Complete MVPs & long-term maintenance

What I do for you
📲 Mobile Applications (React Native / Expo)
→ iOS & Android, clean architecture, best practices, store publication, etc.

⚙️ Complete Back-end
→ Node.js, PostgreSQL, REST API, etc.

🖥Web Front-end
→ React, Next.js, TailwindCSS, dashboards, back-office, custom interfaces, etc.

🚀Turnkey MVPs
→ Scoping → design → development → deployment
Ideal for startups, SaaS, early-stage projects.

🔧Maintenance & improvement of an existing app
→ Debugging, optimizations, improvements, etc.

💰Monetization & payments
→ Stripe, RevenueCat, subscriptions, in-app purchases.

My expertise

A full-stack developer accustomed to startup environments, I design, develop, and evolve mobile and web applications.

My approach focuses on:
- a clear and detailed plan
- good communication and regular feedback
- fast and iterative delivery

Technical Stack (not exhaustive)

Mobile:React Native, Expo (EAS), iOS/Android, OTA updates, etc.
Web:React.js, Next.js, TailwindCSS, etc.
Backend:Node.js, PostgreSQL, REST, etc.
Tools & DevOps:GitHub, CI/CD, Vercel, monitoring, etc.

Example of collaboration with me

📞 Discovery call (goals, scope, constraints)
📝 Quoted proposal and clear work plan
🔧 Development with regular deliveries (weekly) and quick feedback
🚀 Mobile & web deployment (stores, Vercel, backend)
🛠️ Follow-up & maintenance: fixes, evolutions, optimization, continuous support

Want to collaborate?

📩 I respond in less than 24 hours. 🤝
  • English

    Native or bilingual

  • French

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Cococart
    Full-stack Software Engineer
    E-COMMERCE
    December 2021 - Today (4 years and 6 months)
    Our mission is to transform independent businesses to allow them to accept online orders. Cococart allows small businesses to manage their own sales without resorting to apps or marketplaces that charge unsustainable fees and commissions.
    React.js Node.js Next.js PostgreSQL React Native
  • Kombo
    Full-Stack Developer
    TRANSPORTATION
    April 2020 - November 2021 (1 year and 7 months)
    Paris, France
    Kombo is a website for comparing and booking train, bus, and plane tickets for journeys in France and Europe.
    The platform is designed to facilitate ticket searching while offering combinations between different companies and modes of transport to connect cities that do not have direct routes.

    - Implementation and Maintenance of SNCF services on the Kombo platform
    - Implementation of new platform features
    - Research, Design, and Implementation of new architectures
    - Technical Customer Support
    Node.js Typescript React.js Web Integration Web Development
  • OpenClassrooms
    Mentor for Python and Web Development courses
    EDUCATION AND E-LEARNING
    July 2018 - October 2021 (3 years and 4 months)
    Paris, France
    Over 70 students from all backgrounds (young people and professionals) learning web development, Python, and software engineering.

    As a mentor, I support students in their journey by advising and guiding them throughout their learning process. This support includes:
    - regular feedback on work done
    - answers to weekly questions
    - help with weekly blocking points
    - explanation of concepts not understood
    Back-End Development JavaScript Front-End Development Node.js Web Development

Reviews

5.0

Out of 4 ratings

AurélieA

Aurélie

Founder - DIGISPOUDDY

Reviewed on 2/5/2026

Great support! Gaël helped me unlock in-app purchases and finally launch my app. He is very responsive, professional, pedagogical and efficient. It was great working with him on this project
R

Raphael

Katan

Reviewed on 10/14/2025

Excellent work, I recommend

Recommendations

FU
FU
Fabien S.FS
+3
Former user and 5 other people have recommended Gaël

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Education

  • Master - Information Technology Expert
    Epitech
    Centrée sur la pratique et organisée autour de projets à réaliser tout au long du cycle, Epitech est une école qui a pour but de rendre les étudiants opérationnels aussi vite que possible ainsi que les rendre experts dans leur domaine. Apprenant à apprendre, Epitech prépare les étudiants à être polyvalent et leur fait découvrir les différents secteurs liés au développement via des projets variés à réaliser tout au long de la scolarité. ► Programmation systèmes Linux (Bash, C, C++) ► Jeux vidéo (C++) ► Web (NodeJS, C#, HTML, CSS, Javascript, etc.) ► Mobile (Android, Flutter) ► Réseau (Administration système)
  • Bachelor of Information Technology in Software Engineering
    Universiti Kuala Lumpur - Malaysian Institute of Information Technology
    2020
    Année d'étude à l'étranger, en partenariat avec Epitech.

Skill set

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