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Christophe CrognierCC

Christophe Crognier

Fullstack & AI Application Engineer — React / Node

€580/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Christophe

🇬🇧:
Fullstack Engineer focused on designing and delivering production-ready web applications and scalable software systems.
I help startups and companies build reliable products ranging from traditional SaaS platforms to AI-enhanced applications and automation workflows.

My work combines strong software architecture, DevOps practices and pragmatic AI integration to accelerate product delivery while maintaining long-term maintainability.

I work across:
- Modern fullstack applications
- Data-driven platforms
- Business automation systems
- AI and LLM-powered features

My goal is simple: ship robust systems that scale with real users and real business constraints.

🇫🇷 :
Ingénieur Fullstack spécialisé dans la conception et le développement d’applications web et de systèmes logiciels prêts pour la production.
J’accompagne startups et entreprises dans la création d’applications performantes, scalables et maintenables, allant du développement fullstack classique jusqu’à l’intégration de workflows d’automatisation et de systèmes IA modernes.

Mon approche combine architecture logicielle solide, pratiques DevOps et intégration pragmatique d’outils d’intelligence artificielle afin d’accélérer la livraison produit sans compromettre la fiabilité.

J’interviens aussi bien sur :
- Applications SaaS traditionnelles
- Plateformes data-driven
- Automatisations métier
- Systèmes intégrant LLM et agents IA

Objectif : livrer rapidement des produits robustes capables d’évoluer à long terme.
  • French

    Native or bilingual

  • Spanish

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 10km)

Experience

  • Freelance
    Fullstack Developer | DevOps
    SOFTWARE PUBLISHING
    February 2018 - Today (8 years and 4 months)
    Paris, France
    Fullstack Developer with 3 years of experience in structured environments (Scrum, ticket management, product collaboration) and several years in web and SaaS application development. Specializing in React / Node.js architectures, secure API design, and deployment via Docker and CI/CD pipelines.

    - Design and development of custom web applications (React / Node / PostgreSQL)
    - Implementation of complex business logic (constraint management, automated generation)
    - Setup of secure authentication (JWT)
    - Application containerization using Docker
    - Deployment via CI/CD pipelines
    - Direct collaboration with clients from specification to production
    CI/CD Management Node.js Docker React.js React Native
  • Institut F2I, MyDigitalSchool, ECV Digital, Digital Campus, Efrei
    Independent Trainer (7000+ hours)
    EDUCATION AND E-LEARNING
    February 2018 - Today (8 years and 4 months)
    Paris, France
    My experience as a trainer (7000+ hours) enhances my ability to structure architecture, document properly, and communicate effectively with both technical and non-technical profiles.

    Independent trainer in web development (Bachelor to Master level):

    - React, Node.js, Docker, REST API
    - Relational databases
    - Algorithmic
    - Web architecture

    Developed transversal skills:

    - Technical pedagogy
    - Simplification of complex concepts
    - Logical structuring of architectures
    - Technical mentoring
    Teaching React.js Node.js Docker CI/CD
  • Institut F2I
    Full-Stack Developer - End-of-Year Project
    EDUCATION AND E-LEARNING
    February 2018 - November 2018 (10 months)
    Paris, France
    As part of my Web Architect degree, we had to create a complete application and system architecture for a sports activity booking service.

    To achieve this, we first set up a Continuous Integration Service using Debian, Docker, Jenkins, and Git. This allowed us to automate test runs and application deployment.

    - Setup of WebService for a booking system (NodeJS)
    - Design and Development of a Web and Mobile client (React JS / Cordova)
    - Continuous deployment, test automation (Docker / Jenkins / Git)
    React.js Node.js Docker Jenkins CI/CD

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Education

  • Web Architect
    Institut F2i
    2018
    Diplôme visant a former les apprenants a la conception, mise en place et maintenance de solutions informatiques dans le domaine du Web : - Savoir planifier et designer une application, le choix des technologies, la structure du projet, le temps de réalisation. - Savoir construire, développer celle-ci, allant des fonctionnalités Back-End (NodeJs, PHP, Symfony...) a la conception d'interfaces utilisateurs, le Front-End (Html/Css/Javascript/ReactJS). - Savoir mettre en ligne et déployer des applications, ainsi qu'automatiser les lancements de Tests a l'aide d'outils modernes de DevOps (Git, Jenkins, Docker...) En résumé, cette formation contient l'ensemble des connaissances permettant a un individu de créer de toute pièce une application Web, la mettre en ligne, et savoir la maintenir dans le long terme.

Skill set

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