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Pierre GronnierPG

Pierre Gronnier

Fullstack Developer · React, Node.js, PostgreSQL

€200/day
Saint-Quentin, FR
0-2 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Pierre

Need acustom web application**, a **business tool**, or a **professional WordPress site**? I develop **performant, maintainableweb solutions designed for your users, from the database to the interface.

Graduated with aComputer Science degreeand aProfessional Degree in Networks & Telecomsfrom the University of Picardie Jules Verne, I consolidated my experience through two internships during my studies: the first atCompuCraftin front-end development, then a second atCodalemin full-stack development.

At CompuCraft, I designed abilling management interfacein HTML, CSS, and JavaScript.
At Codalem, I worked on **Angular components**, a SvelteKit site with a **headless CMS**, and a **FastAPI REST API**.

I also completedThe Odin Project**, a JavaScript **full-stack curriculumbased on concrete projects, which allowed me to strengthen my skills andbuildseveral **complete full-stack applications**.

My main stack isReact, Node.js+ExpressandPrisma+PostgreSQL**. I also work with **WordPress(Elementor, ACF, WooCommerce) for clients who need a simple-to-administer CMS.

I handle projects end-to-end:
  • database design
  • REST APIs
  • authentication and role management
  • responsive interfaces
  • CMS integration
  • deployment

I place great importance on **code quality**, **maintainability**, and **user experience**.
Some recent projects:
  • private messaging application with JWT, Passport.js, and Cloudinary
  • headless blog with dual React frontend
  • full-stack applications with authentication and data management
  • professional WordPress sites

Available for **short or long-term missions**, one-off or recurring. Feel free to contact me to discuss your project.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Saint-Quentin (up to 50km)

Experience

  • Codalem
    Full-stack Developer Intern
    March 2023 - June 2023 (3 months)
    Amiens, France
    Development of modular Angular components documented with Storybook. Design in Figma and full implementation of a website using SvelteKit with headless CMS (Decap) integration and SEO optimization. Creation of a REST API for automated DOCX document generation in FastAPI (Python)
  • CompuCraft
    Frontend Developer Intern
    April 2022 - June 2022 (2 months)
    Amiens, France
    Design and development of an interface for managing and generating invoices with statistics, entirely in HTML, CSS, and vanilla JavaScript, from mockup to deployment.
  • Plumber Smith — Site vitrine avec système d'articles sur mesure
    Personal Projects - Wordpress · CMS
    May 2026 - May 2026
    Responsive multi-page showcase site for a fictional London plumber. Custom post templates with ACF and Elementor for easy content management, with an emergency contact form optimized via WPForms.
    Wordpress Elementor ACF CSS3

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Education

  • The Odin Project
    Online
    2026
    Cursus open source rigoureux spécialisé dans l'écosystème Fullstack JavaScript, axé sur l'apprentissage par la pratique. Chaque concept est immédiatement appliqué sur un projet concret livré en production.
  • Professional Degree in Computer Networks and Telecommunications
    University of Picardie Jules Verne
    2023
    Formation pluridisciplinaire alliant réseaux, administration système et développement logiciel. Une vision globale de l'informatique qui complète ma pratique du développement web

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