Freelancer profile translated to English.
Back to original languageAbout Gustave
Results-oriented and innovative web & e-commerce developer
I assist companies, brands, and ambitious projects in creating, optimizing, and growing their digital platforms, with a technical, marketing, and conversion-oriented approach.
Depending on the project's needs, I can work alone or with a partner on Malt, with whom I regularly collaborate, to cover a broader technical and functional scope if necessary.
💻 Custom Web Development:
- Design of high-performance applications and websites (React, TypeScript, MERN stack) with a strong focus on user experience, maintainability, performance (Core Web Vitals), and scalable architecture.
🛒 E-commerce Expert:
- Creation and optimization of Shopify, PrestaShop, and WordPress stores from A to Z — advanced theme customization (Liquid, PHP/Symfony, HTML/CSS/JS), catalog structuring (collections, variants, metafields), API integrations, automations (DSers, product feeds), and conversion-oriented UX.
📈 Advanced SEO & High-Value Content:
- Strategic keyword research, intent analysis, semantic structuring, technical and editorial optimization, writing SEO-optimized + commercial content and product descriptions (optimized Hn, storytelling, FAQ, JSON-LD).
🤖 Innovation & Applied AI:
- Design of a proprietary AI tool for generating textual and visual product descriptions (LLMs, prompt engineering, Nano Banana API) to produce coherent, attractive, and scalable content, with automated image post-processing workflows.
📊 Performance & Analytics:
- Google foundation setup (Analytics, technical SEO, tracking), advanced metric monitoring, behavioral analysis, and continuous optimization.
🎯My work combines technical expertise, SEO, AI automation, performance, and marketing, for sustainable, scalable solutions focused on business results.
Polish
Conversational
English
Conversational
French
Native or bilingual
Can work on-site
Cergy-Pontoise (up to 30km)
Experience
- Le FélinShopify E-shop CreationE-COMMERCEOctober 2025 - January 2026 (3 months)Paris, France
Design, development, and optimization of a Shopify e-commerce store from A to Z
With a technical, data-driven, and conversion-oriented approach. Involvement across the entire chain: technical, SEO, UX, performance, and marketing.✨ Key Tasks:- Design and deployment of a Shopify store from scratch
- Advanced theme customization (Liquid, HTML, CSS, JavaScript)
- Complete product catalog structuring (collections, variants, metafields)
- Writing and SEO optimization of product & category pages (semantics, structure, search intent)
- Setup and performance monitoring (traffic, conversions, user behavior)
- Creation of custom features and plugins using Liquid & Shopify API
- Optimization of performance and Core Web Vitals (speed, stability, UX)
- Integration and automation of e-commerce & marketing tools (DSers, product feeds, automations)
- Mastery of LLMs for generating textual content (SEO, marketing, copywriting) and visuals (product images, branding), integrated into e-commerce and marketing workflows.
- Management and import of over 350 products via DSers
- Google foundation setup (technical SEO, Analytics, tracking)
- Advanced optimization of e-commerce UX to maximize conversion rate
- Management of brand consistency / visuals / user experience
- Monitoring and analysis of metrics via SEMrush and Google tools
- GMS WEBAI Tool for Product Description GenerationSOFTWARE PUBLISHINGAugust 2025 - September 2025 (1 month)Paris, France
Design and development of a proprietary AI tool for creating and optimizing product descriptions
With an automated, scalable, and product-consistency-oriented approach.The goal: to produce rich and visually attractive content quickly, without altering the product's real identity in bulk.✨ Key Tasks:- Design of an AI tool for generating product descriptions (text + visuals)
- Automated generation of SEO and commercially optimized product content
- Use of LLMs for structured writing (titles, descriptions, benefits, FAQ)
- Development of a software system integrating the Nano Banana API for AI-powered product image modification, controlled from a custom interface
- Design and implementation of prompt engineering allowing the software to precisely control visual and textual outputs
- Automation of visual generation and enrichment via AI while preserving the exact same product
- Automated addition of backgrounds, atmospheres, and usage contexts without modifying the product
- Software guarantee of preserving product shapes, colors, proportions, and details
- Automated post-processing chain inspired by Photoshop standards (clipping paths, shadows, background integration)
- Automatic harmonization of visuals for multi-product catalog consistency
- Optimization of automated production workflows (time saving, cost reduction)
- GMS WEBDevelopment of an Automated Google SEO & Performance OperatorSOFTWARE PUBLISHINGJuly 2025 - August 2025 (1 month)Pontoise, France
Design and development of an advanced Python tool for SEO and performance analysis
This tool is intended to automatically audit a website via Google APIs and generate AI-assisted SEO recommendations.🔍 Automated Multi-Source SEO Analysis:Full integration of Google Search Console, Google Analytics 4, and PageSpeed Insights APIs to collect, consolidate, and analyze key data: indexing, clicks, impressions, CTR, average position, traffic, engagement, and performance.⚡ Core Web Vitals & Performance:Detailed analysis of Core Web Vitals (LCP, INP/FID, CLS) on mobile and desktop, automated scoring, identification of blocking points, and prioritization of high-impact optimizations.🧠 AI-Assisted SEO Analysis:Use of LLMs (OpenAI) to produce personalized SEO recommendations: critical fixes, technical optimizations, content improvements, semantic opportunities, and overall performance per page.📄 Automated Professional Reports:Generation of structured HTML reports including visualizations, per-page summaries, SEO & performance diagnostics, with automatic email delivery.🔧 Architecture & Automation:Modular architecture in Python: XML sitemap parsing, secure Google OAuth, API quota management, configurable scripts, dry-run modes, URL limiting, advanced execution options.🎯 Goal:Provide a reliable, scalable, and production-ready tool to drive website SEO and UX performance based on real Google data, enriched by AI.
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Education
- Professional License, Web Programming & DevelopmentCY Cergy Paris University2024Licence professionnelle, Programmation / développeur informatique, général
- University Diploma, Computer ProgrammingCY Cergy Paris University2023Diplôme universitaire, Programmation informatique