Developed a REST API demonstrating the student-subject-teacher scenario using JpaRepository with various JPA Hibernate Relationship mappings such as OneToMany, ManyToOne, ManyToMany, etc with in-memory H2 Database.

Microservices for invoice management. The customer service manages customer operations and communicates with the invoice service for customer data. Includes REST APIs, WebClient for inter-services communication, and integration with invoice-core for entities.