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Y DumasYD

Y Dumas

Senior Developer

€500/day
Nancy, FR
8-15 years
React.js
Nuxt.js
Next.js
NestJs
Typescript

Average response time: 1 hour

Freelancer profile translated to English.
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About Y

Senior Stack Consultant | Lead Developer | JavaScript Expert


Looking for a developer who can quickly integrate into your team, understand your business challenges, and deliver reliable features without multiple back-and-forths?

I help companies, startups, and agencies in the design, development, and evolution of web and mobile applications with high business value.

With several years of experience on demanding projects (embedded video streaming, SaaS platforms, management applications, energy, e-commerce, and delivery), I am involved in the entire development cycle: from technical design to production.

## What I can bring you

  • Development of modern web applications (Frontend & Backend)
  • Design of maintainable and scalable software architectures
  • Development of secure REST APIs
  • Design and optimization of databases
  • Development of complex business logic
  • Implementation of authentication and user management systems
  • Integration of third-party services (payment, notifications, partners, ERP, CRM, etc.)
  • Optimization of application and database performance
  • Application migration (Nuxt 2 -> Nuxt 3, modernization of existing code)
  • Development of mobile and web applications
  • Code review and improvement of software quality
  • Team support and technical mentoring
  • Implementation of CI/CD pipelines and Git workflows
  • Dockerization of applications and improvement of development environments
  • Monitoring, log management, and production optimization
  • Development of unit and functional tests
  • Debugging

## Technologies


Frontend
  • React.js
  • Vue.js
  • Nuxt.js
  • Next.js
  • JavaScript
  • TypeScript

Backend
  • Node.js
  • NestJS
  • Express.js
  • REST API
  • Keycloak

Infrastructure
  • Docker
  • Git
  • CI/CD

Database
  • PostgreSQL
  • MySQL
  • SQL

  • French

    Native or bilingual

  • English

    Conversational

Can work on-site
Nancy (up to 50km)

Experience

  • Alpiq France
    Senior Full Stack Developer
    ENERGY AND UTILITIES
    January 2023 - January 2026 (3 years)
    Paris, France
    As Lead Full Stack Developer, I supported the teams in the development and evolution of a business platform for an energy provider.

    My role was to ensure the technical quality of the project, define the architectural directions, support developers in their skill development, and ensure the delivery of new features.

    My responsibilities included:

    technical supervision of developers
    leading code reviews
    defining and applying best development practices
    monitoring code quality and maintainability
    collaborating with product and business teams to translate functional needs into technical solutions

    I contributed to the development of user interfaces as well as the evolution of the web application and the mobile application.

    The developments included:
    • creation of user interfaces
    • development of new business features
    • Scaling the backend architecture of the subscription system, allowing it to support strong growth in transaction volumes.
    • Implemented production log monitoring.
    • Led the Nuxt 2 -> Nuxt 3 migration.
    • Improved front-end and back-end performance, significantly reducing loading times.
    • Implementation of the authentication system based on Keycloak
    VueJS Prisma Express Docker Project Management
  • Delia Solutions
    Full Stack Developer
    CONSULTING AND AUDITS
    August 2019 - February 2021 (1 year and 6 months)
    Vandœuvre-lès-Nancy, France
    Worked on several applications: kiwi-chantier - Business Management (invoices, quotes) Abby - Training Management Platform uconcept - U Stores Presentation Platform
    Nuxt.js NestJs Sequelize Vuetify
  • Cirkwi
    Web Developer
    CONSULTING AND AUDITS
    April 2018 - July 2019 (1 year and 3 months)
    Nancy, France
    Context: The company hired me to work on its main website cirkwi.com as well as on the moduleBox software, which allows the creation of interactive map routes.
    Symfony MangoDB JavaScript twig
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Education

  • Professional License, Web Development
    IUT Charlemagne
    2018
    Licence professionnel, Développement web
  • Technological University Diploma, Multimedia and Internet Professions
    IUT Saint-Die-Des-Vosges
    2017
    Diplôme universitaire technologique, Métiers du Multimédia et de l'Internet
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