10/2014 – 02/2022: E-Commerce

Backend-Application for eBay-Dealers (Book market).

The project creates and maintains a platform for eBay dealers. It simplifies the creation of new offers and tracks the stock with the offers on eBay. It integrates data from eBay, book databases, and distributors.

The system was built with Vaadin on a GlassFish container. Later, it was migrated to Spring 2 with microservices running in docker containers.

The project uses SCRUM Methods like backlog, sprints, and DevOps.


  • Importing stock data from the distributor
  • Generating HTML pages and images for the eBay offer
  • Template-driven creation and activation of offers on the eBay platform
  • Reading orders from eBay and synchronizing the stock and affected offers
  • Creating invoices and customer emails
  • Implementing business processes with BPMN (Camunda)


Create the architecture, Design the application, Maintaining the SCRUM-Backlogs, implementing requirements in a SCRUM-Sprint, Operating and maintaining the application.


Vaadin 7, Angular 4+, Java, REST (Jersey), eBay-API (Java), Camunda, Chrome-Extension-API, J2EE-7, Linux OS (SuSE), Jenkins, Gradle, MagicDraw, Docker, Docker-Compose, GIT

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