A backend application with Spring boot or with SpringMVC with full CRUD functionality and with authorization/authentification will be delivered as POC. With complete application architecture, can be deliverd with as monolith or as microservices. This a startproject will be deliverd with your 5 til 10 desired REST calls.

Application stack:

• Java 8,11
• JDBC,JPA,MySQL, PostgreSQL and H2
• Maven
• Design Patterns (DTO, Facade, DAO, MVC, Singleton)
• SOLID
• Docker Compose
• JWT/OAuth or OAuth2
• Spring Security
• Spring Actuator
• Spring Profiles
• Liquibase(database)
• Tomcat Apache/ JBoss/Payara/PayaraMicro/Webshere Liberty
• Eureka services
• Spring API-Gateway, Load Balancing
• Keycloak,
• Thymeleaf,
• Swagger/Swagger API.

Developed application can be hosted for testing purposes on my personal self-hosted DevOps server, this way you can life follow and monitor stages of your application. Your future application will be deliver with JaCoCo CodeCoverage and with SonarQube rapport.