Hi, I'm
Adeline LefebvreFullstack developer, from custom sites to AI apps
From the business need to production, I build web products that last. Product background (Station F) and a dual fullstack & CMS skill set: Next.js apps with AI (Claude, Mistral), custom websites (WordPress, Craft CMS), and long-term maintenance.
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What I do
Three ways to work together, from build to long-term care.
AI apps & integrations
Fullstack Next.js apps with AI built in: extraction pipelines, dashboards, automations.
- Next.js / TypeScript
- Claude API, Mistral, OpenAI
- Dashboards & data pipelines
- Stripe payments, auth
Custom sites & CMS
Websites that go beyond templates: custom development, headless, multilingual.
- Custom WordPress / Elementor Pro
- Craft CMS, Prismic (headless)
- Multilingual sites & technical SEO
- API integrations
Maintenance & evolution
A long-term partnership: I keep your site alive and evolving, reliably.
- WordPress / Craft / Next.js upkeep
- New features & optimizations
- Performance & SEO
- Direct support, clear communication
Featured projects
Rootyne, AI health platform
Personalized blood-test analysis. AI extraction pipeline (Claude + Mistral) with an anonymization layer, a biologist review dashboard, and encrypted HDS-compliant infrastructure. Built from scratch.
Desert Leaves, environmental NGO
A complete platform built from scratch for a reforestation foundation: Next.js + headless Prismic CMS, Stripe donations (one-time & recurring), multilingual SEO.
LIME Search, finance recruitment
Multilingual recruitment platform in Craft CMS. Custom Twig/PHP components the client can edit, technical SEO, plus ongoing maintenance and new features.
Bulbus, educational mobile app
Cross-platform Flutter app for herbalism students. 150+ plants, timed mock exams, in-app purchases. Live on iOS & Android with 37 paying users.
SDS Lingo, multilingual website
Next.js site (EN/FR/CS) for a technical translation company. Full i18n, a quote form with file upload, multilingual SEO (hreflang) and optimized Core Web Vitals.
Club Fifty Five, creative agency
Premium showcase site for a Dutch talent agency, delivered white-label. Custom widgets (animated marquee), Theme Builder, advanced forms, responsive across 5 breakpoints.
Other experiments
Pepstery, augmented reality game
Marker-based AR game built during a tech residency: 3D character generation, real-time interactions (Pusher), non-linear storytelling (A-Frame, MindAR).
Before freelancing: Software Engineer at Cubyn (80+ microservices, Kubernetes/GCP) and Klox (React/Node SaaS platform).
About
Off-screen, I'm training in herbalism (that's where my app Bulbus came from) and constantly tinkering with new AI tools. I like building things that mean something.
What people say
“I've seen Adeline's work and I recommend her without hesitation. She's a serious, autonomous developer with a great technical vision. You can trust her to deliver your SaaS or web projects!”
Romain Quellec
CTO, former manager of Adeline
“Her motivation and her commitment were greatly appreciated by our team, as were her responsiveness and her positive attitude. Adeline adapts easily to many situations. I highly recommend her project-management skills.”
Manon Duhem
CSR Manager, Deloitte Luxembourg
“Amazing work and I would like to use this moment to express how happy and grateful we are to have you on board. We really can't do this without you and these tasks, how small sometimes they seem, are soooo important to solve.”
Rosa
LIME Search (NL)
Let's work together
Available for one-off missions as well as long-term maintenance partnerships. An app, a custom website, an AI integration, or picking up an existing project? Let's talk.