Johann R.

Web & Mobile Developer | React, Supabase, WordPress | AI & Automation

Freelancer passionate about the web and improving user experience, I support SMEs, freelancers, associations, and project leaders in the creation, redesign, or evolution of their digital tools.

I design high-performance websites, web or mobile applications, as well as automation solutions, adapting to each need — from a quick showcase website to an evolving technical project.

🔧 Services Offered

✅ React / Next.js Web Sites and Apps: Modern, high-performance interfaces, PWA-ready, developed with Tailwind, Supabase, or Firebase

✅ Mobile Applications (React Native + Expo): Fluid Android/iOS apps, published via EAS, connected to Firebase services

✅ Advanced WordPress Sites (Elementor Pro, ACF, WooCommerce): Custom structure, simplified management, responsive, multilingual, SEO-friendly

✅ Automations & Scripts: API integration, data synchronization, automation via Python or Zapier (Zapier, Airtable, OpenAI)

✅ AI & NLP Integration: Intelligent assistants, content generation, semantic enrichment via OpenAI, Hugging Face, spaCy

✅ Maintenance & Technical Support: Post-launch monitoring, updates, VPS hosting (OVH), performance optimization

🧠 Stack & Tools Used (Excerpts)

Web & Mobile: React, Next.js, Tailwind CSS, React Native, WordPress, Elementor Pro

Backend / API: Supabase, Firebase (Firestore, Auth), Flask, PHP, REST APIs (JWT, CORS), CRON

Databases: PostgreSQL, Firestore, MariaDB, SQLite

AI / NLP / Automation: OpenAI (GPT), Hugging Face, spaCy, Zapier, Airtable, Python scripts

Deployment & Hosting: Vercel, OVH VPS, Heroku

SEO & Optimization: RankMath, Google Search Console, Google Analytics, Google Ads

UX & Design: Midjourney, Framer Motion, Photoshop

Tests & Automation: Selenium

➡️ My Portfolio: johannr.fr