Création site e-commerce sur-mesure - WooCommerce & Shopify that really sell
6+ online stores delivered since 2016. Custom e-commerce sites designed to convert – not just present. Optimized shopping tunnel, native e-commerce SEO, product sheets that sell. Your online store deserves more than a Prestashop template.
An e-commerce site that sells means a 10% conversion rate. The market average is 2%.
Most online stores convert between 1% and 2% of their visitors. The best stores achieve 8 to 12%. The difference isn’t in the product – it’s in the architecture of the site, the quality of the buying tunnel, loading speed and the trust the site inspires. A poorly designed e-commerce site is a sales-losing machine.
At JSEM Production, we’ve been creating bespoke online stores since 2016: Limagecils Distribution, Gaou Collection, Cote Sud Est, Maison Folius, Les Coulissants et Roulettes, Free To Learn Chinese. Each project is designed around a single objective – to maximize conversion rates while positioning your store at the top of Google. Take a look at our e-commerce projects to evaluate the quality of our deliverables.
WooCommerce or Shopify - The question on everyone's mind
WooCommerce – Total flexibility. Integrated with WordPress, it lets you combine store and SEO content strategy on the same platform. Ideal for projects requiring extensive customization, an integrated blog or bespoke functionality. It’s our recommendation for 70% of projects.
Shopify – Pure business performance. Intuitive interface, hosting included, rich application ecosystem. Ideal for volume-oriented stores with little editorial content. Our recommendation for projects that want to go fast and hard on sales.
The essential features of a high-performance e-commerce site
Conversion-optimized shopping tunnel
Every step of the customer journey – from product listing to payment – is optimized to reduce shopping cart abandonment. Visible addition to basket, clear summary, transparent delivery options, 1-click checkout, immediate confirmation. Our shopping tunnels systematically convert above the market average.
SEO-native product sheets
Each product sheet is an SEO page in its own right. Optimized URL, unique title and meta tags, structured data Product and Review to appear in Google rich results with price, availability and reviews. Well-optimized product sheets generate qualified organic traffic without spending on advertising.
Flawless mobile performance
70% of online purchases will be made on cell phones by 2026. An e-commerce site that takes more than 3 seconds to load on a smartphone loses 50% of its visitors. Our stores achieve a mobile score of 85+ with LCP under 2.5s – your store will load faster than your direct competitors.
Secure payments – Stripe, PayPal, bank transfer
Integration of the most widely used payment solutions in France and Europe. Stripe for credit cards, PayPal for international trust, bank transfer for business orders. RGPD and PCI-DSS compliance included.
Advanced e-commerce SEO
SEO-optimized category architecture, clean pagination, breakage management, automatic 301 redirects, product sitemap submitted to Google Search Console. Your entire product catalog is visible and indexed by Google as soon as it goes online. Find out more about our e-commerce SEO strategy.
Inventory and order management
Intuitive administration interface to manage your catalog, inventory and orders from your WordPress or Shopify back office. Automatic notifications of new orders, returns management, accounting exports.
Our e-commerce achievements - 7+ stores delivered
- Limagecils Distribution – E-commerce beauty + SEO + graphic design
- Gaou Collection – Shopify + logo + visual identity
- Cote Sud Est – Custom e-commerce + SEO
- Maison Folius – Customized online ordering system
- Les Coulissants et Roulettes – E-commerce + product parameters + payment + delivery
- Free To Learn Chinese – Online training + member area + SEO
- Forceaimant – Custom e-commerce + SEO referencing
Take a look at some of our achievements to evaluate the quality of our online stores.
SEO e-commerce - Selling without paying for advertising
E-commerce SEO is the most profitable investment for an online store. Unlike Google Ads, which stop when you stop paying, organic traffic is sustainable, growing and free.
E-commerce keywords that convert
acheter [produit] en ligne– direct purchasing intent[produit] pas cher livraison rapide– strong transactional intent[produit] avis– decision phase, high conversion rate[produit] prix– price comparison, close to purchasemeilleur [produit] 2026– comparative research, qualified traffic
The structured data that makes your products appear in Google Shopping
Structured data Product with price, availability, reviews and images – to appear in Google Rich Results with a product thumbnail directly in the SERPs. This format attracts 35% more clicks than a standard result.
Why choose JSEM Production for your e-commerce site?
- Proven e-commerce expertise – 6+ stores delivered on WooCommerce and Shopify
- Optimized conversion rate – buying tunnel designed to maximize sales
- Native e-commerce SEO – Google-optimized product sheets, categories and architecture
- Mobile performance – score 85+, LCP <2.5s on all our stores
- Delivery in 5 to 8 weeks – depending on catalog size
- Training included – you manage your store independently from the start
- Monthly WordPress maintenance available to protect your investment
Frequently asked questions
How much does a custom e-commerce site cost?
A bespoke e-commerce site costs between €2,500 and €12,000, depending on the platform and functionalities. Use our free price simulator for a personalized estimate.
WooCommerce or Shopify - which to choose?
WooCommerce offers flexibility and total control over WordPress – ideal for combining store and SEO. Shopify is faster to launch and optimized for pure conversion. We’ll advise you on the right solution during a free call. Contact us for more information.
Is e-commerce SEO included?
Yes, every store we deliver comes with native technical SEO: structured data, optimized URLs, SEO product sheets and basic SEO included.
How long does it take to create an e-commerce site?
JSEM Production delivers a complete store in 5 to 8 weeks, depending on the complexity of the catalog and the necessary integrations.
Can you take over an existing store?
Yes, we carry out complete overhauls with migration of product, order and customer data. A preliminary SEO audit is included to preserve your current Google positions.
An online store that sells - not just presents.
Free quotation within 24 hours. E-commerce specialist since 2016 – 7+ stores delivered.