Quelle est votre spécialité ?
Nous sommes spécialisés dans le développement d'applications web sur mesure, de plateformes SaaS et de MVP. Nous accompagnons startups et PME du cadrage technique au déploiement en production.
Web Agency Villeurbanne
Web agency in Villeurbanne — Applications & SaaS
We design and build custom web applications, SaaS platforms and MVPs with modern architecture and a trusted expert collective.
A web studio specializing in applications, based in Villeurbanne
Aetherio is a web studio led by Valentin Muller, specializing in custom application development, SaaS platforms and MVPs. We support startups, SMEs and scale-ups from idea to production.
Our strength: solid technical architecture (Vue/Nuxt, Node.js, TypeScript) combined with a network of entrepreneurial partners (UX/UI, SEO, product strategy) brought in as needed.
Every project is built for scalability, performance and long-term evolution — not throwaway websites, but lasting digital products.
Based in Villeurbanne, working across Greater Lyon and remotely throughout France.
Our web agency services in Villeurbanne
From MVP to mature product, complementary expertise for every stage
01
Landing pages & product sites
Conversion pages, SaaS showcase sites, onboarding: fast, SEO-ready interfaces to present and sell your product.
02
Custom web applications & SaaS
SaaS platforms, business tools, back-offices, client portals: modern architecture (Vue/Nuxt/Node), security, multi-tenant and scalability.
03
UX/UI & Product design
Workshops, prototyping, design systems and user journeys designed for engagement and retention.
04
SEO & Content
Technical SEO, internal linking, local semantics (Villeurbanne/Lyon), Core Web Vitals and content strategy.
05
Photo / Video (partners)
Authentic visuals to elevate your brand and boost conversions.
06
3D Animation & Motion Design
3D animations, motion design and visual effects for immersive and memorable digital experiences.
Why choose us?
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Projects delivered
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Satisfaction
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Years of experience
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Years of studies
Proximity & transparency
Meetings in Villeurbanne/Lyon, direct contact with the lead developer, no unnecessary intermediaries.
Application expertise
Mastered modern stack (Vue, Nuxt, Node, TypeScript), multi-tenant SaaS architecture, CI/CD and cloud deployment.
Studio agility
Short sprints, regular functional deliverables, quick iterations based on user feedback.
Measurable results
Product goals, SaaS metrics (MRR, churn, retention) and technical performance drive decision-making.
Real projects, measurable results
Every project shown here solved a real business problem. SaaS applications, business tools, high-performance websites. Here's what I've built for my clients.
Discover
Belho Xper App
Web Application / SaaSMulti-tenant SaaS application for accounting firms: client management, automated tax tasks and real-time planning.
Web AppSaaSNestJSVue 3
Discover
Fideneo
Web Application / SaaSFideneo is an all-in-one cockpit designed to simplify and automate beauty salon management.
SaaSUX/UIWeb AppCRM
Discover
BELHO XPER
Accounting FirmA custom website redesign to reposition Belho Xper as a modern, reliable accounting firm with high added value.
Refonte site webUX/UIOptimisation CRO/SEO
Discover
MAISON & MATIERES
Interior DesignA premium website with interactive 3D experience and animations for high-end interior decoration specialists.
Design premiumExpérience 3DGalerie
They trusted me
Founders and business owners who had a project, a need, a deadline. Here's what they have to say.
"Disponibilité, réactivité et implication. Valentin est professionnel et pédagogue."
A
Alban B.
CEO Belho Xper
"Il allie une expertise technique pointue à une solide vision business."
C
Charley A.
Co-fondateur Avnear
"Nous avons travaillé ensemble sur la conception d'une automatisation IA pour un E-commerce. Le suivi a été régulier, clair et efficace. Les délais respectés et le résultat impressionnant."
C
Chihab A.
CEO E-commerce
"Valentin a su être à l'écoute de mes besoins et les retranscrires dans une application de gestion de clientèle. Les résultats ont été plus que satisfaisants et de haute qualité."
S
Sandrine V.
Gérante Sandrin's Nail
"Une entreprise qui sait s'adapter parfaitement au besoin client."
S
Stanislas M.
Commercial
"Le site est clair, rapide, et nous permet de mettre en avant nos services de manière professionnelle. Nette augmentation des demandes."
C
Christophe R.
PDG Ravi Groupe
How we work together
A simple and transparent process. You know where we stand at every step.
1
We talk
A first conversation to understand your project, your market and your constraints. No lengthy brief, a direct conversation.
2
Scoping and strategy
We define the scope, priorities and timeline together. You know exactly what will be delivered and when.
3
Mockups and validation
I design your product mockups. You validate before I touch code. No bad surprises.
4
Iterative development
I develop in functional blocks. You test as we go, we adjust continuously. No 3-month tunnel with no news.
5
Production deployment
Deployment, SEO, monitoring. Your product is live, fast and indexed.
6
Support and evolution
I stay available after launch. Fixes, new features, maintenance. Your product keeps evolving.
FAQ Web agency in Villeurbanne
Pouvez-vous développer un MVP rapidement ?
Oui. Nous maîtrisons le cycle MVP : cadrage fonctionnel, architecture évolutive, développement itératif et déploiement. Un MVP fonctionnel est généralement livré en 2 à 4 mois selon la complexité.
Quels budgets pour une application sur mesure ?
MVP dès 8 000€, applications SaaS complètes dès 15 000€. Devis précis après un cadrage de vos objectifs, fonctionnalités et contraintes techniques.
Quelles technologies utilisez-vous ?
Stack moderne : Vue.js, Nuxt.js, Node.js, TypeScript, PostgreSQL, Redis. Architecture API-first, CI/CD, déploiement cloud (Vercel, AWS). Intégration de services tiers (Stripe, auth, emails).
Intervenez-vous au-delà de Villeurbanne ?
Oui, dans toute la métropole de Lyon et partout en France à distance. Nos outils collaboratifs permettent un suivi de projet fluide quel que soit le lieu.
We get back within 24h with an initial technical analysis
Discover my resources
Complete Web Application Development Guide 2026: Methodologies, AI & Best Practices
19/01/2026
AI Agents in 2026: Practical Business Automation
17/05/2026
Is Your Website or App Failing to Generate Leads? Here's Why and How to Fix It
05/10/2026
Construction Project Management App: How Construction Companies Boost Productivity by 30%
05/08/2026
Custom Real Estate Agency App: Manage Listings, Showings, and Clients Differently
05/03/2026
How to Land Your First SaaS Customers: Strategies That Truly Work
05/02/2026
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