As developers, we often think that when designing an e‑commerce platform, the most important decision is whether to use Magento or Shopify, which theme to choose, or which functionalities need to be implemented. However, this is simply one part—or one component—of the overall system.
It’s essential to understand that an e‑commerce site is not just an online store. It is a system whose purpose is to sell, yes, but one that must also meet functional requirements, business logic, and more. Therefore, designing an e‑commerce platform is not just about configuring a tool; it’s about understanding how all components interact, evaluating how the system will evolve over time, and identifying risks across different scenarios. To do this, we must ask the key questions:
- What would happen if there are traffic spikes?
- What if the number of users increases to 10,000?
- What integrations would be required?
System Requirements
As with any custom development project, identifying both business and system requirements should be the first step when designing an e‑commerce platform. Even though e‑commerce platforms come with the basic components needed for an online store, taking the time to define requirements properly can prevent many future issues—such as overlooked development needs or definitions that no longer fit once the system is in production.
For example, I’ve worked on projects where functional and non‑functional requirements were clearly defined from the beginning, making configuration and development smooth and avoiding wasted time. On the other hand, I’ve also experienced projects where the lack of early requirement analysis led to misaligned business needs, integrations that negatively impacted development timelines, teams without direction, and high costs for a product that ultimately failed to meet expectations.
Main Components
It’s important to keep in mind that an e‑commerce system is composed of multiple elements that address many of the questions we must consider when designing the architecture. Each component must be properly configured.
We can say that an e‑commerce platform typically includes:
- Frontend: the visible part of the store where users browse, view products, and make purchases.
- Backend: where products, prices, and store configurations are managed.
- Database: where all information is stored, including customer data and configurations.
- Search engine: enabling fast product searches.
- Cache layer: improving site performance.
- Integrations: with external systems such as payment gateways or ERPs.
- Infrastructure: ensuring security, availability, scalability, and more.
Architectural Decisions
From my perspective, this is one of the most important—and most complex—stages of the design process, because it’s where the foundation of the system is chosen and implemented. I often use the analogy of constructing a building: although technology allows us to iterate, improve, and correct (something far more difficult in construction), starting with a solid foundation reduces future technical debt and unexpected issues.
At this stage, we decide which technology to use, and to do so we must consider the business needs—whether they can be fully met by the platform alone or whether additional solutions are required. I’ve worked on projects where the only justification was “Magento, now Adobe Commerce, is the most robust platform,” when in reality a custom development might have been a better solution. Over time, these projects became increasingly complex, difficult to maintain, and suffered from significant performance issues. As a result, some of these stores eventually ceased to exist.
Conclusions
From a developer’s perspective, the greatest complexity in implementing an e‑commerce platform lies in integrating third‑party modules, meeting business requirements, and performing the necessary customizations—both in the frontend and backend.
But from an architectural perspective, applications and e‑commerce systems go far beyond code or the choice of technology.
Choosing the platform is certainly an important step, but it is only one piece of the system. A thorough analysis is necessary to make the most accurate decisions and minimize future risks.
-F. Nieves