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.

10+
CMS & platforms
20+
Technologies
50+
Integrations
100%
Custom

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

WordPress

Most widely used CMS for creating showcase sites, blogs and e-commerce sites via WooCommerce.

CMSBlogE-commerce
Shopify

Shopify

SaaS e-commerce platform ideal for creating high-performance and scalable online stores.

E-commerceSaaSMarketplace
PrestaShop

PrestaShop

Open-source e-commerce solution adapted to custom merchant sites and advanced catalogs.

E-commerceOpen-source
Webflow

Webflow

Design-oriented no-code platform for creating modern websites with integrated CMS.

No-codeDesignCMS
Strapi

Strapi

Open-source headless CMS for custom websites and web applications via API.

HeadlessAPIOpen-source
Contentful

Contentful

SaaS headless CMS for JAMstack architectures and multi-channel content distribution.

HeadlessSaaSAPI
Wix

Wix

Accessible no-code solution for simple websites and online stores.

No-codeSaaSE-commerce
Magento

Magento

Enterprise e-commerce platform for complex sites, B2B and large catalogs.

E-commerceEnterpriseB2B
WooCommerce

WooCommerce

WordPress e-commerce solution for creating custom online stores.

WordPressE-commercePlugin
Squarespace

Squarespace

All-in-one platform for elegant websites and simplified e-commerce.

No-codeSaaSDesign
Ghost

Ghost

Modern CMS dedicated to content publishing, newsletters and member areas.

CMSNewsletterPublishing
Drupal

Drupal

Robust open-source CMS for complex, multilingual and institutional websites.

CMSEnterpriseOpen-source

CMS or custom development: how to choose

The right technical choice comes down to three questions: who will run the site day to day, how much business-specific logic it needs to carry, and how fast it will have to evolve.

A CMS like WordPress or Shopify is the right call when your need matches what these tools already do very well: presenting a business, publishing content, selling a catalog. Launch is fast, administration stays accessible without technical skills, and the ecosystem covers most common needs. It's the shortest path to a professional website that works, and the one we take for most showcase sites and stores.

Custom development becomes relevant when the site is the product: complex member areas, specific business logic, critical performance, deep integrations with your internal tools. You don't twist a CMS into doing what it wasn't designed for. Past a certain level of specificity, a Next.js or Laravel base costs less to evolve than a CMS overloaded with conflicting plugins.

On timelines, the orders of magnitude are simple: a showcase site ships in a few weeks, an e-commerce store usually takes one to two months depending on catalog and integrations, and a custom platform is built in stages, with usable first deliveries early on rather than a six-month tunnel.

Our technical stack
for high-performance websites

We use a modern and proven technical stack to develop fast, secure and scalable websites.

React
React

React structures the interface into reusable components: build once, use everywhere, and the display stays smooth even when a page handles a lot of data. It's the library behind most modern web applications.

Next.js
Next.js

Next.js adds what a public website needs on top of React: server-side rendering for clean SEO, static generation for speed, automatic image optimization. It's the framework we use for most of our custom builds, including the site you're reading.

Vue.js
Vue.js

Vue.js takes a progressive approach: it fits into an existing project as easily as it powers a full application. Its simplicity makes it an efficient choice for business interfaces and projects that need to move fast without cutting corners.

Nuxt
Nuxt

Nuxt is to Vue what Next.js is to React: server rendering, static generation and a ready-made project structure. A solid base for multilingual content sites that need to be both fast and well ranked.

TypeScript
TypeScript

TypeScript adds strict typing to JavaScript: errors surface while writing code, not in production in front of your visitors. On a project that lives for years, it's what keeps the codebase reliable even as the team changes.

Node.js
Node.js

Node.js runs JavaScript on the server and handles a large number of simultaneous requests without flinching. It's the backbone of our APIs and real-time features: notifications, messaging, synchronizations.

PHP
PHP

PHP remains the most widespread server language on the web: WordPress, PrestaShop and Magento are built on it. Kept up to date and properly configured, it's a solid, cost-effective choice for showcase sites and online stores.

Laravel
Laravel

Laravel gives PHP projects a modern framework: authentication, queues and testing built in from day one. We use it for business applications that need a robust backend without reinventing the wheel.

MySQL
MySQL

MySQL is the web's reference relational database: reliable, battle-tested, perfectly suited to CMS platforms and e-commerce. Sound transactions and stable performance, even as the catalog grows.

PostgreSQL
PostgreSQL

PostgreSQL takes over when data gets complex: analytical queries, JSON data, full-text search. It's our choice for platforms where data is the core of the product.

MongoDB
MongoDB

MongoDB stores data as flexible documents, with no rigid schema. Ideal when the structure evolves quickly: a rich product catalog, an application built by iterations, an MVP still finding its shape.

Docker
Docker

Docker guarantees your site runs exactly the same way in development and in production. Fewer deployment surprises, safer updates, reproducible infrastructure.

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

Stripe

Secure online payment platform for e-commerce.

PayPal

PayPal

World-leading international payment solution.

HubSpot

HubSpot

All-in-one CRM and marketing automation platform.

Salesforce

Salesforce

World's #1 enterprise cloud CRM for B2B and B2C.

Mailchimp

Mailchimp

Professional, accessible email marketing platform.

Slack

Slack

Collaborative team communication tool.

Google Analytics

Google Analytics

Web analytics for visitor and conversion tracking.

Intercom

Intercom

Customer support platform with AI and live chat.

Zapier

Zapier

Workflow automation connecting 5,000+ applications.

Airtable

Airtable

Flexible collaborative database, like a supercharged spreadsheet.

Notion

Notion

All-in-one workspace for documentation and collaboration.

Monday

Monday

Visual, collaborative project management platform.

Asana

Asana

Agile task management for team organization.

Trello

Trello

Visual kanban boards for simple project management.

Qonto

Business neobank for European companies and freelancers.

Zendesk

Zendesk

Customer service suite with ticketing and support CRM.

Hotjar

UX analytics for user behavior on websites.

Segment

Segment

CDP platform for collecting and unifying customer data.

ActiveCampaign

Email automation platform with built-in CRM.

Pipedrive

Pipedrive

Sales CRM focused on pipelines and deals.

Mollie

Mollie

European payments with SEPA and local methods.

Square

Square

Unified POS and online payment solution.

Crisp

Multichannel live chat for real-time customer support.

Brevo

Brevo

European marketing automation and CRM platform.

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 more

Studio 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 more

Our process, designed to last

A clear framework to launch fast, evolve continuously and never start from scratch.

01

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.

02

Structure & Experience

Site architecture, user journeys and first mockups. Everything is designed to be readable, scalable and optimized from the start.

03

Progressive Development

Integration, development and business features. The site takes shape in stages, with concrete and quickly usable deliverables.

04

Testing & Continuous Optimization

Performance, responsive, technical SEO, accessibility. Each iteration improves the existing, without breaking what already works.

05

Controlled Launch

Deployment, server configuration, security and DNS. Your site is ready to be used, indexed and maintained over time.

06

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?

Two models, two logics. Studio finances the complete creation of your website in fixed monthly payments from 499€/month, all inclusive: design, development, hosting, maintenance and monthly evolution credits. Infinity is an unlimited subscription covering builds and evolutions continuously, with no per-task billing. In both cases, no endless quotes and no surprise costs: you know what you pay before you 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 ships in a few weeks, an e-commerce store in one to two months depending on catalog and integrations. With Infinity, first deliveries usually land within 48 to 72 hours, then the site evolves continuously through iterations. In most projects, the real timeline factor is content: the sooner texts and visuals are ready, the sooner the site goes live.

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.

Should I choose a CMS or custom development?

A CMS when your need matches what it does natively well: showcase, content, catalog. Custom when the site is the product: specific business logic, complex member areas, deep integrations. The wrong choice is costly in both directions: a CMS twisted with plugins becomes fragile, and custom development for a simple showcase site is an unnecessary luxury. We advise based on your need, not on what suits us.

Who owns the website once it's built?

You do. The deliverables belong to you, and with Studio the source code is secured from day one through an escrow agreement, then fully transferred at the end of the 36-month contract (or earlier via an early buyback from the 18th month). Hosting and domain name remain transferable in all cases: you are never locked in with your provider.