How do you document APIs and interactions between components for the development team? What standards and tools do you use?

For documenting APIs and interactions between components, I use OpenAPI (Swagger) standards for RESTful services, which allows describing endpoints, methods, parameters, and data models in a machine-readable format. This facilitates client SDK generation and automatic validation.

For internal component interactions, I use UML sequence diagrams or the C4 model to visualize architecture and data flows.

Tools:

• Swagger Editor / Swagger UI for API documentation.
• Postman for testing and demonstrating APIs.
• Confluence or Notion for storing and collaboratively working on documentation.
• PlantUML for creating diagrams.

This approach ensures transparency, ease of maintenance, and accelerates communication within the team.