By adopting this modular architecture, Baby Bunting reduced the operational complexity typically associated with large-scale replatforming. Rather than being locked into a single system, the organisation now has the agility to evolve quickly, implement new features, and integrate new technologies as customer expectations evolve.
Structured for clarity and scalability
We extended the composable philosophy to the presentation layer. The application is structured into clearly defined, domain-specific layers, each maintained independently, giving stakeholders clear visibility into where functionality lives and what it relates to.
The modular structure also supports straightforward integration of AI-driven solutions. With well-bounded domains and organised context, AI agents can efficiently navigate the codebase and contribute with minimal friction.
The backbone of a seamless experience
At the core of the backend architecture is a Node.js–Express middleware layer built on Alokai. This layer acts as a connector between the frontend and key backend systems, including Commercetools, PIM, SendGrid, Constructor.io, Auth0 and Baby Bunting’s internal CRM.
All core commerce data — customers, products, carts, orders and promotions — is managed within Commercetools and accessed via GraphQL. The middleware also manages complex shipping logic, ensuring accurate calculations based on postcode, product weight, click & collect requirements, bulky items and marketplace products.
Marketplace functionality is powered by Mirakl, enabling third-party sellers to manage their products while integrating seamlessly into the broader commerce ecosystem, giving customers a consistent shopping experience across owned and marketplace inventory.
