Website creation: showcase,
e-commerce & custom solutions
We design high-performance, scalable websites tailored to every business need. From professional showcase sites to e-commerce platforms, including custom web developments, we master the entire chain: design, development, integrations, and technical optimization. Each project is built on solid architecture, modern technologies, and an approach focused on performance, visibility, and long-term scalability.
Our services in website
creation and development
Complete expertise to design, develop and evolve your website.
Showcase & Corporate Sites
Professional showcase sites to present your business, services and company. Custom design, clear structure, optimized content and solid SEO foundation from launch.
E-commerce
High-performance e-commerce site creation with product catalog, optimized checkout funnel and secure payments. Solutions adapted to online sales, order management and business growth.
Web Applications
Custom web application development: business platforms, member areas, internal tools and automated workflows. Web solutions designed to meet specific and evolving needs.
Responsive & Mobile
Fully responsive websites, optimized for mobile, tablet and desktop. A smooth user experience on all screens, without compromising performance.
Performance & Optimization
Performance optimization, loading time and technical structure. Fast, stable sites designed for natural referencing and conversion.
Maintenance & Evolution
Continuous maintenance, updates, bug fixes and feature additions. Your site evolves over time, without starting from scratch, according to your needs.
CMS and web
platforms mastered
We design custom websites with leading CMS, e-commerce platforms and headless solutions on the market.
WordPress
Most widely used CMS for creating showcase sites, blogs and e-commerce sites via WooCommerce.
Shopify
SaaS e-commerce platform ideal for creating high-performance and scalable online stores.
PrestaShop
Open-source e-commerce solution adapted to custom merchant sites and advanced catalogs.
Webflow
Design-oriented no-code platform for creating modern websites with integrated CMS.
Strapi
Open-source headless CMS for custom websites and web applications via API.
Contentful
SaaS headless CMS for JAMstack architectures and multi-channel content distribution.
Wix
Accessible no-code solution for simple websites and online stores.
Magento
Enterprise e-commerce platform for complex sites, B2B and large catalogs.
WooCommerce
WordPress e-commerce solution for creating custom online stores.
Squarespace
All-in-one platform for elegant websites and simplified e-commerce.
Ghost
Modern CMS dedicated to content publishing, newsletters and member areas.
Drupal
Robust open-source CMS for complex, multilingual and institutional websites.
Our technical stack
for high-performance websites
We use a modern and proven technical stack to develop fast, secure and scalable websites.
Bibliothèque JavaScript open-source créée par Facebook pour construire des interfaces utilisateur interactives et performantes. Architecture composants réutilisables, Virtual DOM ultra-rapide et écosystème riche. Idéale pour applications web modernes SPA (Single Page Application) et sites dynamiques nécessitant interactivité temps réel.
Framework React de production développé par Vercel offrant Server-Side Rendering (SSR) et Static Site Generation (SSG). Optimisation automatique images, API routes intégrées et SEO excellence. Solution parfaite pour sites e-commerce performants, blogs corporate et applications web nécessitant référencement optimal Google.
Framework JavaScript progressif léger et accessible créé par Evan You. Syntaxe intuitive, courbe apprentissage douce et intégration progressive dans projets existants. Réactivité native, composants modulaires et performances excellentes. Choix privilégié startups et PME pour prototypes rapides et applications métier efficaces.
Framework meta Vue.js pour applications universelles full-stack. Rendering côté serveur, génération statique et routing automatique. Configuration zéro et modules puissants. Parfait pour sites corporate multilingues, portails contenu et applications nécessitant SEO avancé avec performance maximale.
Superset JavaScript développé par Microsoft ajoutant typage statique fort. Détection erreurs compilation, IntelliSense IDE et refactoring sécurisé. Maintenabilité code améliorée équipes grandes tailles. Indispensable projets complexes longue durée nécessitant robustesse scalabilité architecture logicielle enterprise.
Runtime JavaScript côté serveur basé moteur V8 Chrome. Execution asynchrone non-bloquante, NPM gestionnaire packages géant et architecture événementielle. Backend scalable APIs RESTful, microservices temps réel et applications full-stack JavaScript. Performance exceptionnelle traitement requêtes concurrentes massives.
Langage serveur web open-source mature et stable powering 77% sites web mondiaux. Base WordPress, PrestaShop, Magento et Drupal. Écosystème CMS riche, hébergement accessible partout et communauté mondiale gigantesque. Solution éprouvée sites vitrines, blogs corporate et boutiques e-commerce PME.
Framework PHP élégant moderne suivant architecture MVC. Eloquent ORM puissant, Blade templating et Artisan CLI. Écosystème complet : queues, broadcasting, authentification et testing intégré. Développement API RESTful rapide, applications métier sur-mesure et SaaS B2B nécessitant backend robuste évolutif.
Système gestion base données relationnelle open-source leader mondial. ACID compliance, transactions fiables et performances optimales requêtes complexes. Scalabilité horizontale clustering, réplication master-slave et optimisation indexes. Choix standard e-commerce, CMS WordPress et applications nécessitant intégrité données transactionnelles critiques.
Base données relationnelle objet open-source avancée ultra-puissante. Support JSON natif, full-text search et types données complexes. Extensibilité fonctions personnalisées, conformité SQL stricte et concurrence MVCC. Solution enterprise analytics, data warehousing et applications fintech nécessitant requêtes analytiques sophistiquées.
Base données NoSQL orientée documents flexible schemaless. Stockage JSON/BSON, scalabilité horizontale automatique sharding et réplication haute disponibilité. Agrégation pipeline puissant et indexation versatile. Idéale applications temps réel, IoT, catalogues produits dynamiques et prototypes MVP agiles évoluant rapidement.
Plateforme conteneurisation applications standard industrie DevOps. Images légères portables, orchestration Compose et déploiement reproductible multi-environnements. Isolation microservices, CI/CD automatisation et infrastructure immuable. Garantit environnements développement production identiques éliminant bugs "ça marche chez moi".
Traditional agencies bill every action.
We move forward. Continuously, with you.
A website connected
to your entire ecosystem
Payment, CRM, automation, marketing, analytics: we integrate your existing tools and build custom connections for a truly operational website.
Stripe
Plateforme de paiement en ligne sécurisé pour e-commerce.
PayPal
Solution de paiement internationale leader mondial.
HubSpot
Plateforme CRM marketing automation tout-en-un.
Salesforce
CRM cloud enterprise numéro 1 mondial B2B et B2C.
Mailchimp
Plateforme email marketing professionnelle et accessible.
Slack
Outil de communication collaborative pour équipes.
Google Analytics
Solution analytics web pour tracking visiteurs et conversions.
Intercom
Plateforme support client avec IA et chat live.
Zapier
Plateforme automation workflow connectant 5000+ applications.
Airtable
Base de données collaborative flexible type spreadsheet amélioré.
Notion
Workspace all-in-one pour documentation et collaboration.
Monday
Plateforme gestion projet visuelle et collaborative.
Asana
Outil gestion tâches agile pour organisation équipes.
Trello
Tableaux kanban visuels pour gestion projets simple.
Qonto
Néobanque pro pour entreprises et freelances européens.
Zendesk
Suite service client avec ticketing et CRM support.
Hotjar
Analytics UX comportement utilisateurs sur sites web.
Segment
Plateforme CDP collecte et unification données clients.
ActiveCampaign
Plateforme email automation avec CRM intégré.
Pipedrive
CRM commercial axé pipeline ventes et deals.
Mollie
Solution paiements Europe avec SEPA et méthodes locales.
Square
Solution paiement POS retail et online unifiée.
Crisp
Chat live multicanal pour support client temps réel.
Brevo
Plateforme marketing automation et CRM européenne.
Our areas of expertise
Complete mastery of the entire web development chain
Design & Integration
- Figma/Adobe XD mockup integration
- Design system and reusable components
- Modern and intuitive user interfaces
- Animations and micro-interactions
- Branding and visual identity
Business Features
- Member areas and authentication
- Reservation and booking systems
- Interactive product configurators
- Dashboards and analytics
- Workflows and automation
Integrations & API
- CRM and marketing tool connections
- Secure payment gateways
- RESTful and GraphQL APIs
- Webhooks and synchronization
- Third-party services and SaaS
Performance & SEO
- Speed and Core Web Vitals optimization
- Technical SEO and structured markup
- Compression and lazy loading
- Cache and CDN
- WCAG 2.1 accessibility
Security & GDPR
- SSL/HTTPS certificates
- Attack protection (XSS, CSRF)
- GDPR and cookie compliance
- Automatic backups
- Monitoring and alerts
Maintenance & Support
- CMS and plugin updates
- Bug and responsive fixes
- Feature additions
- Migration and redesign
- Dedicated technical support
Website Creation with
Synerium Agency
As a specialized agency in website creation and web development, Synerium Agency offers two complementary approaches to meet all needs: a subscription formula to continuously evolve your site, and a packaged formula for a defined project from the start. In both cases, we design high-performance, scalable websites built to last, from showcase sites to more complex web projects.
Infinity Subscription
Continuous website design and development via monthly subscription. You submit unlimited requests: changes, fixes, new pages or optimizations. Ideal for keeping your site alive over time, adapting it to your activity and progressively improving its performance.
Learn moreStudio Package
Custom website creation with a scope defined from the start and included follow-up credits. This package is adapted to defined projects like showcase sites or e-commerce sites, with post-launch support to ensure stability, adjustments and evolution.
Learn moreOur process, designed to last
A clear framework to launch fast, evolve continuously and never start from scratch.
Framing & Priorities
We clarify your objectives, constraints and real priorities. No useless fixed specifications: we define what needs to move forward now, and what comes next.
Structure & Experience
Site architecture, user journeys and first mockups. Everything is designed to be readable, scalable and optimized from the start.
Progressive Development
Integration, development and business features. The site takes shape in stages, with concrete and quickly usable deliverables.
Testing & Continuous Optimization
Performance, responsive, technical SEO, accessibility. Each iteration improves the existing, without breaking what already works.
Controlled Launch
Deployment, server configuration, security and DNS. Your site is ready to be used, indexed and maintained over time.
Monitoring & Evolution
After launch, the project continues to live. Corrections, additions, content, SEO, new features: we move forward with you, not after you.
Why choose Synerium for your website?
Creating a website is not just about putting it online. It must be fast, visible, scalable and able to adapt to your growth. At Synerium, we design websites that don't stop at launch.
Solid technical foundation, designed to last
We design high-performing, secure and scalable websites using modern technologies like Next.js, React, WordPress or Shopify. Each project is built on clean code, a clear structure and an architecture optimized for natural search. Showcase site, e-commerce or web application: the technology adapts to your need, not the other way around.
Useful design, not just aesthetic
A good site must be beautiful, but above all effective. We design clear, consistent and conversion-oriented interfaces, designed for all devices. Smooth navigation, logical flow, readable messages: every detail is crafted to turn your visitors into users or customers.
A visible site today, high-performing tomorrow
SEO and performance are integrated from the design phase: semantic structure, loading times, Core Web Vitals and technical SEO.
And most importantly, the project doesn't stop at launch. With the Infinity subscription, your site continues to evolve: improvements, fixes, content, SEO and new features, without starting from scratch.
What is the price for website creation at Synerium?
The price depends on the model chosen. With the Studio formula, you get a packaged website, custom designed, with a defined scope and post-delivery support. With the Infinity subscription, creation, evolution, fixes and optimizations are included continuously, without per-action billing. In both cases, you know exactly what is included from the start.
What is the difference between Studio and Infinity?
Studio is ideal for a framed project: showcase or e-commerce site with a specific objective and defined budget. Infinity is for companies that want to evolve their site over time: new pages, SEO optimizations, UX improvements, features, content. With Infinity, your site never stays static.
How long does it take to create a website?
A showcase site can be delivered in a few weeks depending on complexity and content validation. With Infinity, first deliveries usually occur within 48 to 72 hours, then the site evolves continuously through successive iterations.
Is SEO included?
Yes. SEO is integrated from the site design phase: HTML structure, tags, performance, mobile, accessibility. With Infinity, SEO is also worked on over time: content, technical optimizations, continuous improvements and monitoring.
Can I evolve my site after it goes live?
Yes, and it's even a central point of our approach. With Studio, you have follow-up credits to evolve your site after delivery. With Infinity, evolutions are unlimited: new pages, fixes, features, design, SEO.
Do you only work with certain CMS?
We work with the CMS and frameworks best suited to each project: WordPress, Shopify, Webflow, Next.js, headless CMS, custom solutions. The choice depends on your objectives, your business and your technical constraints.
Will my site be fast and secure?
Yes. All our sites are optimized for performance and security: loading time, HTTPS, development best practices, updates and monitoring. Performance is an integral part of website quality.
Can I manage my site myself after delivery?
Of course. We design interfaces that are simple to manage and can train you in their use. And if you prefer not to manage anything, Synerium can take care of it for you.
Who is the Infinity subscription for?
Infinity is designed for companies that want to move forward without friction: startups, SMEs, marketing teams, leaders who no longer want to arbitrate every change. It's an ideal solution if your site is a living tool, not just a static support.