Briefly tell about the architecture of the service.

The architecture of the service is usually built on a layered principle:

• Client layer — interaction with the user (e.g., REST API or web interface).
• Service layer (business logic) — processing requests, applying rules and algorithms.
• Data access — interaction with the database or other storage.

In my case, the service is implemented in Java using Spring Boot. Data is stored in a relational database (PostgreSQL). Interaction between layers occurs through DTOs and services. To enhance fault tolerance and scalability, the following are used:

• Caching (Redis)
• Asynchronous processing via queues (RabbitMQ)
• Monitoring and logging (Prometheus, ELK)

This approach ensures modularity, ease of maintenance, and scalability of the service.