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MedusaJS Headless Commerce – happycoding

We are a Berlin-based agency focused on headless architectures for commerce with MedusaJS as a flexible commerce engine. Goal: online shops and digital sales channels that load extremely fast, perform strongly in SEO, and scale cleanly. With MedusaJS we combine an open, extensible backend architecture with modern frontends such as NextJS – ideal for B2B/B2C shops, dealer portals, marketplaces, and scaling D2C brands.

Strong commerce performance isn’t an accident. By decoupling frontend and backend, using an API-first approach (REST), and leveraging edge caching, we deliver product and catalog data in milliseconds – even under heavy traffic. This reduces server load, stabilises operations, and measurably improves Core Web Vitals. Conversion first: fast checkout flows, clean markup, and reliable indexing form the basis for sustainable growth.

Flexibility and integrations are our strength: we connect MedusaJS with systems like Sanity (content), Shopify (as a channel), ERP/PIM/CRM, payments (e.g., Stripe, Adyen, Mollie), fulfilment & WMS – creating commerce platforms that efficiently orchestrate products, content, and touchpoints. Our team of strategists, developers, and designers shares a passion for clear structures and technical excellence. With MedusaJS we build commerce products that convert today and scale robustly tomorrow – secure, modular, and adaptable.

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Happycoding Team

Level up with MedusaJS Headless Commerce – for more leads, more revenue, and predictable growth.

Through better UX, optimised performance, and a scalable architecture, our headless relaunches help attract more qualified traffic, increase basket sizes, and reduce checkout abandonment. Headless means: clean separation of content and commerce logic, fully customisable frontends, and clearly defined integrations – for higher conversion and faster campaigns.

Exzellente Core Web Vitals im Composable Stack

Lightning-fast storefronts with MedusaJS & Next.js

MedusaJS + Next.js delivers enterprise-grade commerce performance. Decoupling, intelligent caching (edge/CDN), modern rendering (SSR/SSG/ISR), and structured product data enable millisecond load times – even with catalogues of thousands of SKUs. Result: better SEO, higher conversion rates, and a noticeably smoother shopping experience.

Services

We offer a full range of services around Medusa as a headless commerce platform – from initial concept to ongoing operations:

Concept & Design

Discovery & concept workshops
Catalogue/pricing & promotions strategy
UX/UI design & checkout optimisation
Technology & integrations consulting

Implementation

Storefront with NextJS (SSR/SSG/ISR)
Payment integration (Stripe/Adyen/Mollie)
PIM/ERP/CRM integration (e.g., Akeneo, SAP, HubSpot)
Internationalisation (languages, currencies, taxes)
Fulfilment, WMS & shipping logic
Plugins & modules (pricing, promotions, sales channels)
POS integration

Betrieb

Maintenance / support desk
SEO / AIEO for ecommmerce
Asset optimisation / CDN setup
Security hardening & PCI aspects
Monitoring, logging & hosting
Catalogue & content production
SLA-backed incident management

Your value

Why companies trust our headless solutions with Mediusa as their commerce platform:

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Modular commerce engine

Open architecture with swappable modules (pricing, promotions, inventory). Precisely adaptable to B2B/B2C use cases – without vendor lock-in.

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Built to scale

Clean APIs, microservice-ready components, and global delivery – with controllable ongoing costs.

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Fast & conversion-focused

Millisecond load times, optimised PLPs & PDPs, and a fast checkout. Ideal for SEO, paid landing pages, and campaigns.

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Commerce & API expertise

Strategic guidance from domain modelling and promotions logic to security/compliance – including observability and CI/CD.

FAQ

Was Sie schon immer über MedusaJS wissen wollten...

Created: October 19, 2025

Last updated: October 19, 2025

MedusaJS Headless Commerce | Happycoding