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Mathieu D.MD

Mathieu D.

Fullstack Developer TypeScript | React & NodeJS

€350/day
Nantes, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Mathieu

I develop web applications and APIs used in concrete business contexts, where reliability, clarity, and understanding of usage are essential.

I support teams on internal tools, business platforms, and SaaS applications, involving complex business rules, structured workflows, and automation needs. My approach consists of understanding business constraints before proposing a suitable, maintainable, and truly useful technical solution for daily use.

I have notably worked on quote generation tools, document flow supervision, and industrial applications used by non-technical teams. My goal is to simplify processes, reduce errors, and improve operational efficiency.

I am involved from design to production, with particular attention to code quality, user experience, and the sustainability of delivered solutions.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Groupe janneau
    Fullstack Developer TS (NestJs / React)
    CIVIL ENGINEERING
    November 2024 - December 2025 (1 year and 1 month)
    Nantes, France
    Contribution to the development and evolution of an internal quote creation platform for a major industrial manufacturer of doors and windows.

    - Involvement in core business features, involving complex calculation rules, option dependencies, and specific industrial constraints.


    - Improvement of the user interface to simplify input paths, reduce user cognitive load, and limit errors during quote configuration.

    - Implementation of automation for repetitive and time-consuming tasks (calculations, validations, data processing), making results more reliable, speeding up quote generation, and improving the productivity of sales and technical teams.

    - Close collaboration with business teams to understand their actual usage, translate functional needs into adapted technical solutions, and pragmatically and sustainably evolve the tool.
    External API Integration Front-end Interface Development React.js Node.js MongoDB
  • ActivBold
    Fullstack Developer JS (AWS / React)
    TECH
    September 2023 - August 2024 (11 months)
    Paris, France
    Development of a supervision dashboard for monitoring the processing of digitized documents for professional clients.

    Design and implementation of a supervision interface to visualize the progress of processing in real-time (digitization, recognition, document transformation).
    Implementation of control functionalities directly from the dashboard, allowing users to perform control and management actions on document flows.

    This work has improved client visibility on their projects, strengthened their autonomy in monitoring processing, and simplified operational document management, while reducing manual exchanges and support requests.
    Node.js Amazon Web Services React.js DynamoDB AWS S3
  • Thales
    Fullstack Developer TS (Express / React)
    DEFENSE AND MILITARY
    February 2023 - April 2023 (2 months)
    Cholet, France
    Development of a template creation tool for methods teams and technicians in an industrial environment (2-month internship).

    Design and realization of an application allowing methods engineers to independently define and configure testing templates for electronic boards used in production.
    The tool was designed to meet field constraints, by simplifying test configuration and reducing dependence on specific developments.

    This solution has accelerated the implementation of manufacturing methods, improved team autonomy, and made production testing processes more reliable.
    React.js Typescript MongoDB Node.js

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Education

  • Bachelor Application Development and Design
    MyDigitalSchool
    2024
  • BTS Information Technology Services to Organizations
    Lycée chevrollier
    2023

Skill set

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