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Louis FortinLF

Louis Fortin

React frontend developer ⚛️ Node backend 🟢

€500/day
4 projects
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Louis

🔍Looking for a senior React and Node developer?
Need a performant and robust web application?
I am the right person for you.

Software engineer for 8 years, I specialize in web development, with expertise in JavaScript.
I have worked for large groups, both public and private, including France Télévisions and ADEME.

What I offer:
- Definition and specification of your needs
- Tailor-made solutions: websites, web platforms, SaaS
- Full-stack development with React.js and Node.js.
- Implementation of unit and end-to-end tests to ensure code reliability.
- Refactoring, migration, and modernization of your React applications.
- Database setup with SQL, MongoDB.- Clear documentation for reusable work.
- Deployment with automation tools (docker, CI/CD, ...).

I also have knowledge of Angular, Vue.js, TypeScript.

I am committed to providing you with a daily report of my activities and any blocking points.

I am dedicated to delivering the best possible application, for which I use tools such as:
Google Lighthouse (for optimization), Observatory Report (security), Ecocheker, Website Carbon Calculator (eco-design), ...

Passionate by nature, I work on open-source projects in my free time:
- React-seed
- Next-seed
- bilan-carbone

🆙 Let's discuss your project!

📫 Contact me directly on the platform


---
Frontend coding, Frontend design, ReactJS full-stack developer, Frontend Developer React/Next.js, backend developer, Engineer Developer - Web React, Full stack JS Developer, React Node Software Engineer, React.js frontend, React frontend, fullstack full stack, software engineer React, Software developer Node, development engineer
  • French

    Native or bilingual

  • English

    Native or bilingual

  • Dutch

    Conversational

Can work on-site
Paris (up to 50km), Rennes (up to 50km), Lille (up to 50km), Bordeaux (up to 50km), Lyon (up to 50km)

Experience

  • EXO-DEV
    React Developer
    SOFTWARE PUBLISHING
    November 2025 - Today (7 months)
    Lyon, France
    The Exo-Dev project is above all a desire to create a human company in our image: dynamic, expert, and passionate.

    Exo-dev has over 10 years of experience in development for multiple ambitious projects with geographical components (including an innovation competition with the city of Paris).

    I joined exo-dev as a part-time Freelancer (1-2 days / week)
    At the heart of my mission, I took charge of and completely optimized the PDF generation engine (React-PDF) with measurable results:

    📉 -50% on the weight of generated files
    ⚡ -75% on generation time
    ✅ 100% of texts are selectable - a previously absent feature

    I also intervene in bug fixing, continuous improvement of the codebase, as well as UX and responsive design, to ensure a fluid experience on all devices.
    Web Development Responsive design Continuous integration React.js PDF Generation
  • Association pour la transition Bas Carbone
    React Next Developer
    ENVIRONMENTAL
    October 2024 - Today (1 year and 8 months)
    Paris, France
    The Association for Low Carbon Footprint (ABC) – formerly the Carbon Footprint Association – was created in 2011 by ADEME and APCC, to carry and disseminate the Carbon Footprint® methodology.

    I joined ABC as part of the from-scratch refactoring of an application (BC+) from Windev to Next.js / TypeScript. The project's goal is to enable companies to calculate their carbon footprint.
    My team consists of 4 to 5 FullStack JavaScript developers and a Product Owner.

    My missions:
    🎯 Definition of technical specifications and strategies
    👨‍🏫 Participation in training internal company teams
    🗃️ Creation of the database (Prisma, PostgreSQL)
    🆙 Development of views in React/Next
    🦾 Writing unit tests (Jest) and end-to-end tests (Cypress)
    🔍 Code review (github)

    Results:
    - Deployment in production every 2 weeks with less than 2% bugs.

    Link:
    ---
    Frontend coding, Frontend design, ReactJS full-stack developer, Frontend Developer React/Next.js, backend developer, Engineer Developer - Web React, Full stack JS Developer, React Node Software Engineer, React.js frontend, React frontend, fullstack full stack, software engineer React, Software developer Node, development engineer.
    React.js Typescript PostgreSQL Next.js fullstack developer
  • Owaltech
    React Node Developer
    TELECOMMUNICATIONS
    October 2020 - September 2024 (3 years and 11 months)
    Rennes, France
    Shadline is the first autonomous digital survival system. Major attack or ransomware: Shadline combines collaborative tools and guaranteed access to your vital data to overcome crises.

    I joined Shadline to strengthen the team and support junior developers. The mission is to define and implement the technical strategy to achieve a robust application used by hundreds of users every day.

    Objective:
    Development of an encrypted communication web application (React, Node, SQL).

    My missions:
    ♻️ Refactoring of the front-end application (React)
    🆙 Development of new features from design to deployment (React - Node - SQL)
    🔔 Customer support assistance (Guaranteed technical solution for customer problems within 24 hours)
    👨‍🏫 Training junior developers (2 apprentices)
    🦾 Performing automated end-to-end tests with Playwright (35 minutes of automated tests)

    Results:
    - Comprehensive coverage of use cases by Playwright tests
    - 100% of customer tickets resolved within 24 hours
    - Training of 2 junior React - Node developers

    Link:
    ---
    Frontend coding, frontend design, ReactJS NodeJS full-stack developer, Front-end developer React, backend developer, web development engineer React, Full stack JS developer, Node React software engineer, Node backend, React.js frontend, React frontend. full-stack full-stack, React software engineer, Node software developer, development engineer.
    React.js Node.js SQL Node.js Developer React.js frontend developer

Reviews

5.0

Out of 3 ratings

RomainR

Romain

Président - CTO - EXO-DEV

Several days project

-

Reviewed on 5/4/2026

A big thank you to Louis who integrated very well into the project entrusted to him despite a challenging stack. He is an experienced developer who works cleanly and provided pertinent advice when necessary. I recommend him without hesitation!
G

Guillaume

vorteX.io

Reviewed on 11/4/2024

Louis proposed a quality prototype to vorteX-io, establishing a relationship of trust and enabling the consideration of new future services to support our business development. A big thank you to you Louis and see you soon for the continuation of your developments with the vorteX-io team.

Recommendations

Lilian AlvarezLA
Paul-Noël CholotPC
LD
+2
Lilian Alvarez and 4 other people have recommended Louis

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Education

  • Software & Data Engineer
    ESEO
    2017
    développement web

Certifications

Skill set

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