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Mathieu WoronieckiMW

Mathieu Woroniecki

Tech Lead Senior AI Architect | Vue React PHP Dev

€800/day
129 projects
Paris, FR
8-15 years

Average response time: 2 hours

Freelancer profile translated to English.
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About Mathieu

Tech Lead Senior & AI Architect (+10 years of experience)

I don't just "code" your projects: I design scalable, secure, and high-performance architectures that support your business growth.

After leading technical teams and international projects (25 countries, 150k+ users), I put my expertise at the service of ambitious companies to solve complex problems through the Modern Web and Artificial Intelligence.

1. Artificial Intelligence & Automation
  • I transform your workflows by integrating the power of Generative AI.
  • RAG (Retrieval-Augmented Generation) Applications: Creation of intelligent chatbots connected to your private data (PDF, Notion, SQL) for instant information access.
  • Automation & Agents: Design of autonomous AI agents to perform complex tasks (Intelligent Scraping, data analysis, content generation via OpenAI/Claude API).
2. Frontend Architecture & Web Apps (Vue.js / React) In-depth expertise in the modern JavaScript ecosystem for fluid interfaces.
  • Stack: Vue.js 3, Nuxt.js (SSR), React.js, TypeScript.
  • Focus: Performance (Core Web Vitals), UI/UX Engineering, complex dashboards.
3. Backend & Advanced WordPress Architecture Far from pre-designed themes, I develop robust and tailor-made solutions.
  • Headless Architecture: WordPress as an API + React/Vue Frontend for maximum performance.
  • Complex Integrations: API connections (Salesforce, HubSpot, ZoHo, ERP) and real-time synchronization.
  • Security: Audits, Hardening, OWASP compliance.
4. Strategic Consulting (CTO as a Service) I support decision-makers in their technological choices.
  • Architecture and security audit.
  • Technical Roadmap Definition & Recruitment.
  • Industrialization (Docker, CI/CD).

I understand your challenges (ROI, Conversion) before talking code. I simplify, explain, and support.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Engie Digital
    Web Developer
    ENERGY AND UTILITIES
    March 2022 - Today (4 years and 3 months)
    In Engie Digital, I am in charge of the Digiplace intranet and the Engie Digital public site. Digiplace references all existing solutions at group level.

    I imagine the future of the platform, improve it, meet technical needs and participate in its maintainability. Accessibility and security are daily challenges.
    Drupal WordPress SASS Gulp SonarQube Cybersecurity PHP JavaScript RGAA
  • Sodexo SA
    Lead Developer Acquisition Platform
    PUBLIC SECTOR
    August 2020 - August 2021 (1 year and 1 month)
    Issy-les-Moulineaux, France
    For a year, I managed the development team which takes care of Sodexo's acquisition sites in 25 countries. Resolutions of country tickets, team management, definition of the roadmap, code refactoring, and evolution.

    I was in daily contact with the developers, the devops, the product managers, the various management and development teams in the countries.
    WordPress Lead Developer Tech Lead Team Management Web Development Back-End Development
  • MISTERTEMP
    Malt logoOn Malt
    WordPress Developer
    January 2020 - January 2020 (1 month)
    Development of the MisterTemp website, custom-built on WordPress from mockups.
    PHP Back-End Development WordPress Web Development JQuery WordPress Plugin Web Integration

Reviews

4.9

Out of 86 ratings

F

Félix

Ecositezy

Reviewed on 9/1/2025

Nous avons collaboré avec Mathieu sur la rédaction d’un document technique détaillant l’architecture et le fonctionnement d’un projet complexe. Le résultat a largement dépassé nos attentes : un livrable clair, structuré, extrêmement complet — bien au-delà de ce que nous avions demandé — et livré dans les délais. Au-delà de ses solides compétences techniques, Mathieu apporte une véritable vision business et projet. Il n’hésite pas à proposer des idées pertinentes qui enrichissent la réflexion et à fournir des chiffrages et préconisations fiables. La communication a été excellente tout au long de la mission : disponible, à l’écoute, agréable et capable de s’adapter à nos contraintes. Ayant collaboré avec de nombreux freelances, nous pouvons dire que Mathieu fait partie des meilleurs profils avec lesquels nous avons travaillé : plus lead développeur que simple développeur, il est un vrai partenaire de projet. Nous le recommandons sans aucune hésitation !
A

Alexandre

Alex Trading

Reviewed on 5/13/2023

Un plaisir de travailler avec Mathieu. Il explique très bien les étapes et ce qu'il fait. Efficace, rapide, rien à dire, c'est la personne qu'il faut pour travailler sur vos projet web ! Merci encore :) Cordialement Alexandre.

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Recommendations

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Education

  • Master 1 Digital Project Manager
    F2I
    2014
  • BTS SIO (Services Informatiques aux Organisations)
    Itic Paris
    2013

Skill set

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