What business functions have been implemented in your previous projects?

In previous Java projects, I implemented various business functions, such as:

• User management: registration, authentication, role and access rights management.
• Order processing: creation, status updates, cost calculation, and payment management.
• Integration with external services: data exchange via REST API, handling responses and errors.
• Business process automation: implementing logic for event and trigger handling.

For example, in one project, I created a service for order processing that checked stock availability, calculated discounts, and generated the final order amount, ensuring transactional integrity and data accuracy.