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Yvon N.YN

Yvon N.

Senior Fullstack Consultant Vue.js · React · Node

€550/day
Lille, FR
8-15 years
React.js
Node.js
NestJs
Vue.js
PostgreSQL

Average response time: 1 hour

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About Yvon

Senior Freelance Fullstack JavaScript/TypeScript Consultant with 9 years of experience in designing and developing high-volume SaaS platforms, deployed in multi-entity and international environments (up to 13 countries).

Versatile across the entire stack: Vue.js 3 (Composition API, Pinia, Vuetify) and React.js on the frontend, Node.js (Express, Fastify) / NestJS / TypeScript on the backend, with advanced mastery of PostgreSQL, MongoDB, and high-performance caching systems (Redis/Valkey).

Last mission: 3 years at Adeo (Leroy Merlin Group) on the IKY SaaS platform deployed in 13 countries. Design of a Node.js BFF industrializing OAuth2 APIs, metadata-driven automation engine (-70% time-to-market), Vue 2 → Vue 3 migration, 85% test coverage, Datadog monitoring (-40% critical errors).

Autonomous, delivery-oriented, and focused on software quality (Clean Architecture, SOLID, DDD, CI/CD GitHub Actions, GCP Cloud Run). Able to quickly audit a codebase and contribute immediately. I also design AI-augmented engineering agentic workflows (Claude Code Skills open-source project) orchestrating specs → architecture → code → tests → launch, with PASS/WARN/FAIL quality gates.
E-commerce
Health and Wellness
Banking and Financial Services
Retail (Small Business)
Digital and IT Services

  • French

    Native or bilingual

  • English

    Fluent

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

Experience

  • Adeo
    Senior Fullstack Developer Node.js / Vue.js 3
    January 2023 - Today (3 years and 5 months)
    France
    IKY (I Know You) Platform – Internal multi-entity SaaS deployed in 13 countries (France, Spain, Italy, Portugal, Brazil, South Africa...).
    Digital Factory, Agile Scrum.

    Vue.js 3 Frontend (Composition API, Pinia, Vuetify, Zod, Vee-validate) with scalable modular architecture.
    Migration Vue 2 → Vue 3 and replacement of Jest by Vitest (-30% execution time).
    Design of a secure Node.js/Express/TypeScript Backend For Frontend (BFF) via OAuth2, industrializing APIs for 13 countries.

    Design of a metadata-driven backend automation engine → -70% time-to-market.
    Redis/Valkey caching strategies on high-volume endpoints.
    Clean Architecture, SOLID, DDD. Multi-layer tests 85% coverage. - -
    Datadog monitoring (SLI/SLO) → -40% critical errors. CI/CD GitHub Actions + GCP Cloud Run → -30% deployment time. Resolution of 95% of N1/N2 incidents within SLAs.

    Stack: TypeScript, Node.js, Express, Vue.js 3, Pinia, Vuetify, Mozaic, Figma, Vitest, Zod, OpenAPI, OAuth2, PostgreSQL, MongoDB, Redis/Valkey, Docker, GitHub Actions, Datadog, GCP Cloud Run.
    Pinia NodeJS MongoDB Vue.js Cloud GCP
  • Créative Ingénierie
    Senior Fullstack Developer Node.js / React.js
    November 2022 - Today (3 years and 7 months)
    France
    CSE Platform – SaaS rental platform for works councils. Team of 7 to 12 people, Agile Scrum.

    - Node.js backend development (Express) and integration of a Strapi headless backend (custom controllers, policies, RBAC).
    - React.js / TypeScript frontend development – Front architecture refactoring (-40% incidents).
    - Integration of Figma mockups, development of reusable components, implementation of secure REST APIs and CI/CD GitHub Actions. Pair programming and code reviews with the team.

    Stack: React.js, TypeScript, Strapi, Express, TailwindCSS, Redux, Jest, Figma, GitHub Actions, Docker.
    React.js Github Actions Strapi redux JAVA/JEE;
  • Cryptocowries
    Web Developer
    July 2022 - October 2022 (3 months)
    Context: Refactoring of a cryptocurrency trading platform for a better multi-device experience. Team of 7 people, Agile Scrum.
    Bug tracking and fixing. Pair programming and code reviews. Refactoring for better maintainability (-40% front incidents).
    Skills: ReactJS, TypeScript, TailwindCSS, Redux, Jest, date-fns, FuseJS, GitLab, GitHub Actions.
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Education

  • Master in Computer Science
    Ecole Supérieure de Gestion, d'Informatique et des Sciences (ESGIS)
    2018
    Master En Informatique
  • Higher Technician Diploma (DTS)
    Ecole Nationale d'Economie Appliquée et de Management (ENEAM).
    2013
    Diplôme De Technicien Supérieur (DTS)

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