You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Mathieu CrosnierMC

Mathieu Crosnier

Web & Mobile Fullstack Developer

€250/day
Nantes, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
Back to original language

About Mathieu

Passionate Web & Mobile Developer, I am currently pursuing a Master's degree in AI & Data Science Expert at EPSI. My background, marked by a technical apprenticeship within the French Air and Space Force, has allowed me to acquire great rigor and a strong sensitivity to security and accessibility standards (RGAA).

Versatile, I can intervene on your entire project, from back-end to front-end, including mobile:
  • Modern Web Development: Creation of responsive interfaces with React.js / Next.js and careful integration (HTML/CSS, Bootstrap).
  • Robust Back-end Architecture: Development of APIs and complex business logic with Symfony (PHP), database management (PostgreSQL, MySQL).
  • Mobile Development: Design of cross-platform applications via React Native, as demonstrated by my personal project Skimate (ski app with mapping and real-time weather).
  • Rigor & Methodology: Accustomed to demanding environments (Agile Method, Git, CI/CD).
  • Autonomy: Ability to manage a project from A to Z (Fullstack).

Available for development missions (MVP creation, redesign, feature additions), do not hesitate to contact me to discuss your project!
  • French

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Hardis Group - Cloudity
    Junior SalesForce Consultant
    December 2025 - Today (8 months)
    Saint-Herblain, France
    Development & Maintenance of Web Portals (TMA)

    Responsible for the corrective and evolutionary maintenance of enterprise web solutions:

    • Quality Management: Analysis, qualification, and resolution of incident tickets (Debugging).
    • Development: Creation and configuration of new client sites and portals.
    • Project Monitoring: Collaboration with technical teams for patch deployment and continuous platform improvement.
    Salesforce
  • Armée de l'Air et de l'Espace
    Apprentice: Web Application Developer
    AVIATION AND AEROSPACE
    January 2023 - January 2025 (2 years)
    Tours, France
    Contribution to the development of internal web applications to improve the base's management and organization tools. Technical environment: Symfony, PostgreSQL, JavaScript, PHP, DSFR (State Design System) Implementation of specific business features in Symfony Setup of user interfaces respecting accessibility standards (RGAA) Integration of DSFR components to standardize the interface Database modeling and access security Agile Methodology
    Symfony DSFR PostgreSQL PHP JavaScript
  • Kõdoka
    Web Developer
    March 2023 - April 2023 (1 month)
    Joué-lès-Tours, France
    Participation in the design of a web CRM using the KodeIgniter framework, allowing the management of the company's various clients and projects from an administrator interface.
    HTML/CSS/JS HTML5 Web Development PHP

Recommendations

Be the first to recommend Mathieu

Help this freelancer shine by sharing your experience working together.

These freelancer profiles also match your criteria

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Education

  • Master SIN
    EPSI
    2027
    Master SIN
  • Bachelor: Application Developer Designer
    2IAcademy
    2025
    Licence : Concepteur Développeur d'Applications

Skill set

Categories