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Guillaume N.GN

Guillaume N.

Expert WordPress & WooCommerce | Performance, SEO

€450/day
1 project
Versailles, FR
3-7 years

Average response time: 24 hours

Freelancer profile translated to English.
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About Guillaume

Expert WordPress, I help businesses, freelancers, and e-commerce owners turn their website into a real growth lever.

My approach isn't limited to development: I intervene on everything that impacts the performance of a WordPress or WooCommerce site and its concrete results.

✅ Custom WordPress & WooCommerce Development
Creation, redesign, theme customization, specific functionalities, checkout funnel, client area, technical optimization, and development tailored to business needs.

✅ Optimization & Performance
Speed improvement, Core Web Vitals, stability, mobile experience, loading optimization, technical cleanup.

✅ Referencing (SEO / GEO)
Technical SEO, GEO, site structure, strategic page optimization, Google visibility, and optimization focused on acquiring qualified traffic.

✅ Maintenance & Security
Updates, bug fixes, security, evolutionary maintenance, and long-term support.

I work on both new creations and existing WordPress sites that need to improve in performance, visibility, stability, or scalability.

Many WordPress sites become difficult to maintain over time: slowness, plugin accumulation, recurring bugs, poor mobile experience, neglected technical SEO, or difficulties in evolving the site without risk.

On WooCommerce, these problems can quickly impact sales, referencing, and customer experience.

My goal is to offer reliable, useful, and sustainable solutions with a pragmatic approach: less unnecessary complexity, more efficiency.

Each intervention aims for concrete improvements:
better performance,
better user experience,
better visibility,
more stable site,
simplified maintenance.

If you have a slow, aging, poorly visible, difficult-to-maintain, or evolution-limited site, I can help you bring it up to standard.
  • French

    Native or bilingual

  • English

    Native or bilingual

Can work on-site
Versailles (up to 50km), Paris (up to 50km)

Experience

  • Nobis-Web
    Founder & WordPress Consultant
    CONSULTING AND AUDITS
    April 2026 - Today (2 months)
    Versailles, France
    Founder of Nobis-web.fr, I help businesses, freelancers, and e-commerce owners in the creation, evolution, and optimization of their WordPress sites. I specialize in custom development, redesigns, WooCommerce, performance (Core Web Vitals), technical GEO SEO, evolutionary maintenance, and security. My approach combines technical expertise with a business vision, with a clear goal: a fast, reliable, visible, and profitable website.
    Wordpress SEO Digital Marketing GEO WooCommerce
  • TRANSATEL (an NTT company)
    Full Stack Developer
    TELECOMMUNICATIONS
    June 2024 - Today (2 years)
    Paris, France
    I contribute to the development, optimization, and maintenance of several web projects and applications for Transatel and its subsidiary Ubigi, combining technical expertise with coordination with product, marketing, and design teams.

    I actively participate in proposing technical solutions and organize follow-up with marketing, design, and development teams to ensure performant, maintainable, and scalable websites and applications.
    Wordpress WooCommerce React.js Web Development SEO
  • Rightprice
    Creator & Full Stack Developer – Rightprice (UK)
    REAL ESTATE
    March 2023 - Today (3 years and 3 months)
    England, UK
    Key features and responsibilities:
    • Development of the Chrome extension in React and TypeScript, integrated directly into Rightmove listing pages.
    • Cross-referencing data via multiple APIs to enrich each listing with advanced information.
    • Design of a custom backend based on WordPress used as an internal API, including a custom database to store real estate price history.
    • Automated scraping of Rightmove to continuously collect new listings, initial prices, and price changes.
    • Data analysis and display: showing price history directly on listings, highlighting price drops.
    • Product lifecycle management: design, development, maintenance, functional evolution, and usage monitoring.
    React.js Typescript Wordpress PHP API

Reviews

5.0

Out of 1 rating

CD

Cabinet D'Avocats

Avocat - Legiwise

Reviewed on 6/1/2026

Serious and competent WordPress expert. The site is more performant and pleasant to use. Guillaume was very quick and efficient. Our exchanges were fluid and enjoyable.

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Education

  • JAVASCRIPT WEB DEVELOPER
    Wild Code School
    2018
    DÉVELOPPEUR WEB JAVASCRIPT
  • Computer Science Program CS50x
    HarvardX
    2023
    Computer science program

Skill set

Categories