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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'm the person you're looking for.

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
- Custom 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, React/Next.js Frontend Developer, backend developer, Web Developer - 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 (9 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, serving 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 fully optimized the PDF generation engine (React-PDF) with measurable results:

    📉 -50% on the weight of generated files
    ⚡ -75% on generation time
    ✅ 100% of texts rendered 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 smooth 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 9 months)
    Paris, France
    The Association for Low Carbon Transition (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 a Windev application (BC+) into Next.js / TypeScript. The project's objective is to enable companies to carry out their carbon footprint assessment.
    My team consists of 4 to 5 FullStack JavaScript developers and a Product Owner.

    My responsibilities:
    🎯 Definition of specifications and technical strategies
    👨‍🏫 Participation in the training of the company's internal 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:
    - A deployment in production every 2 weeks with less than 2% bugs.

    Link:
    ---
    Frontend coding, Frontend design, ReactJS full-stack developer, React/Next.js Frontend Developer, backend developer, Web Developer - 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 responsibilities:
    ♻️ Refactoring of the front-end application (React)
    🆙 Development of new features from design to deployment (React - Node - SQL)
    🔔 Customer support assistance (Guarantee of providing a technical solution to customer problems within 24 hours)
    👨‍🏫 Training junior developers (2 apprentices)
    🦾 Realization of automated end-to-end tests with Playwright (35 minutes of automated tests)

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

    Link:
    ---
    Frontend coding, frontend design, ReactJS NodeJS full-stack developer, React Frontend Developer, 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, Software developer Node, 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 us with relevant advice when needed. 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 future collaborations to support the development of our activities. 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
FU
+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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