Freelancer profile translated to English.

Description

I support my clients from A to Z since 2010 in the creation of their React / Node web applications or in their evolution

👨‍💻 I am an expert in **NextJS / React.JS / Node.js fullstack development**.

⚙️ Over35projects completed, with over15years of experience as a **fullstack developer**.

🧑‍💼 My clients have trusted me since **2009**. ⭐⭐⭐⭐⭐

🧑‍💼 +15 years of total experience

🧑‍💼 +10 years of experience inReact.js / NextJS.

🧑‍💼 +5 years of experience in NodeJS / NestJS.

Specialized in FIXED PRICE development of web applications ranging from €2,000 to €50,000 for SMEs and Startups.

My most recent clients:

Eurotunnel

VP Auto

Shift Technology

Cdiscount

Bénéteau

Alstom

Thalès

Réseau Ferré de France

Total

JC Decaux

EDF

Qualibat

My preferred technologies:

- React (Javascript or Typescript) / NextJs

- Node / Nestjs

Fullstack Profile:

Frontend Development: ReactJS, NextJS

✅Frontenddevelopment underReact

✅ Mastery of theNextJSframework

✅ Use ofReactJStools like Vite and MaterialUI

✅ Website design

✅ Mastery ofReactlibraries

✅React.jsandNextJSExpert

✅ WebSocket integration

✅ Map integration with Leaflet

✅ IFC integration for 3D models in real estate

Backend Development: NodeJS, NestJS, OpenAI ChatGPT API

✅ Backend development underNodefor business logic.

✅ Web application development

✅APIintegration.

✅ Deployment of the solution underAzure

✅ Microservice architecture

✅ Maintenance of your applications

✅ Mastery of OpenAI ChatGPT APIs

🏆 Need abackenddeveloper?

🏆 Need afrontenddeveloper?

🏆 Need afullstackdeveloper?

For any quote request, contact me,I respond in less than an hour.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Remote only

Primarily works remotely

RJ Consulting
Fullstack Developer NextJS ReactJS Node
January 2009 - Today (17 years and 7 months)
I support my clients from A to Z since 2010 in the creation of their React / .NET web applications or in their evolution
👨‍💻 I am an expert in React.JS / .NET fullstack development.
⚙️ Over 35 projects completed, with over 15 years of experience as a fullstack developer.
🧑‍💼 My clients have trusted me since 2009. ⭐⭐⭐⭐⭐
🧑‍💼 15 years of experience in C# .NET
🧑‍💼 10 years of experience in React.js.

Specialized in FIXED PRICE development of web applications ranging from €2,000 to €50,000 for SMEs and Startups.
Madintec
On Malt
Integration of the mockup on the Madintec software
SOFTWARE PUBLISHING
March 2026 - March 2026
- Integration of the design into the HMI MadX interface in React.js
- Development and management of SVG animations for real-time visualization of embedded systems (propulsion, energy, navigation)
- Implementation of a reusable component architecture adapted to the constraints of a control interface
- Integration from a private Nexus npm registry in an isolated environment
React.js SVG Typescript
Kleep
On Malt
React code audit
DIGITAL AND IT
February 2026 - February 2026
- Comprehensive audit of an existing, substantial, and scalable React project
- Code quality review: architecture, patterns, best practices, overall consistency
- Identification of blocking points for scalability: state management, coupling, performance, bundle size
- Audit of the CI/CD pipeline and the dev → staging → prod chain
- Production of a detailed audit report with prioritized recommendations and an action plan
- Recommendations on optimizing deployment processes

Check out Ronan's experience

Vincent

CTO - SDMDM

Reviewed on 5/7/2026

Ronan was efficient and organized, with very good technical mastery.

Matthieu

Dirigeant - Madintec

Reviewed on 3/24/2026

Ronan is pleasant to deal with, responsive, and completed a project with challenging business constraints. He handled it very well. Congratulations. I recommend him for your projects.

Show all 3 reviews