DDD x API Platform: 4 years later 🇺🇸

In 2022, we explored how Domain-Driven Design principles could be applied with API Platform 3, which helped making API Platform better.

Four years later, API Platform 4, PHP 8.5 and Symfony 8 have reshaped the landscape. Time to revisit the topic! API Platform is the most productive framework for building web APIs. Its conventions and Doctrine integration make it incredibly fast to get started. But when business complexity grows, that simplicity slowly becomes a constraint.

This talk picks up where the first edition left off. With its revamped resource model, state processors/providers and filters system, API Platform 4 makes it easier than ever to structure applications around your domain. But the real value of DDD shows when the framework’s defaults no longer fit: heavy data processing, large dataset streaming powered by Symfony’s JsonStreamer - the kind of scenarios where you need to step beyond the built-in conventions.

Hexagonal architecture, message-oriented design, clear boundaries between domain and infrastructure: we’ll show how these patterns translate concretely into an API Platform 4 project, both when you stay on the rails and when you deliberately leave them.