An API for a simulated library system using microservices architecture. The app consists of 3 services: ● Book storage service for managing book records, book tracker service for tracking availability of books and authentication service for handling user authentication.

A Hotel Booking Application using a multi-layer architecture. ● The application allows users to search, book and manage hotel reservations, with an integrated chat feature using WebSockets for real-time group messaging. Includes user authentication with JWT tokens and email-verification.

● A RESTful API app for managing hotels using multi-layer architecture which provides features such asretrieving hotel lists, getting detailed information about specific hotels, filtering hotels by various parameters, adding new hotels, adding new amenities to existing hotels, this app also supports generating histograms for grouping hotels by specific parameters. Additionally, this app allows quick switching between different databases, such as H2, MySQL.