What architectural solutions have been used, and with whom did they interact?

Architectural solutions often used a microservices approach for scalability and independent deployment of components. Interaction occurred through REST API and message queues (e.g., RabbitMQ or Kafka) for asynchronous communication between services.

For integration with external systems, adapters and gateways were used to ensure security and data transformation. Within the team, interaction was with developers, testers, and business analysts to clarify requirements and agree on the architecture.