H

h2

Saga pattern with an orchestrator for managing long‑running distributed transactions. A central coordinator (orchestrator) directs microservices through a series of steps and compensation actions when necessary. It’s a learning lab designed to contrast with event‑driven choreography, show transaction boundaries, and explore rollback strategies in distributed systems.

A demo of reactive programming in Spring WebFlux. It implements a user management API with non-blocking create, get, and stream operations. Security is handled via JWT-based authentication to illustrate best practices for reactive endpoints. The project is intended for learning and experimenting with reactive architectures, streaming data, and scalable non-blocking APIs in Spring.

Event‑driven microservices using Apache Kafka. It includes producers, consumers, topic schemas, and event handling logic designed to illustrate real‑world patterns like event sourcing, pub/sub design, consumer groups, and eventual consistency. The goal is to explore Kafka integration in a microservices ecosystem with practical code examples and architectural principles.

Saga choreography pattern for managing distributed transactions across microservices using asynchronous events. Each service participates in the saga by emitting and responding to domain events, eliminating a central orchestrator. The project includes multiple cooperating services, event definitions, and examples of compensation flows to handle failures in event sequences.

The Service Cluster allows users to rate movies and leave optional comments. It's built with Spring Boot 3 and Spring Cloud, using REST communication between microservices. The system focuses on storing and retrieving individual ratings, with no analytics involved. Gradle is used for build and dependency management.

Bank Microservice

The "queens" puzzle in Scala programming language

Java + Micronaut + Flyway + H2 + MyBatis (persistence framework) + Jetty + Gradle + Spock

Fullstack Project in our first semester. (Vue.js und SpringBoot) Oliver Bryn Alcantara & Jörg Spitzer It is a fullstack administration application to manage students and teachers which helped us get to know the concepts of CRUD (Create, Read, Update, Delete) operations and how frontend and backend requests work together to deliver the desired functionality. I worked on both front & back - end, with more focus on the frontend aspect of the application.

La aplicación Alura Discussion Platform permite a los usuarios participar en discusiones y obtener respuestas a sus preguntas sobre diversos temas, los usuarios pueden registrar una cuenta y acceder a diferentes categorías de discusión para buscar temas de su interés, igualmente, pueden crear publicaciones, realizar preguntas y responder a otras publicaciones para contribuir a la comunidad y compartir conocimientos.

backend in Spring boot for CRUD api with examples of one-to-many,many-to-many relation . React frontend for this project https://gitlab.com/VasoTodorovic/react-hotel-frontend

Simple example of @Transactional to avoid data becomes inconsistent Sender Army sends amount of soldiers to Receiver Army. If the process fails but we update Receiver Army numbers, the data will be inconsistent.

Demo - Microservice SpringBoot for H2 DB in memory

A proposal solution to a recruitment challenge, being a variation of well known pet clinic idea.

React-SpringBoot

Gestor is created in order to support the running of the school.

Mock-A-Shop is a simple shopping web application that is written in Java. It is built upon the Spring Boot framework and consists of a Web Application and RESTful APIs.