jvasileiou

I developed applications using Google Web Toolkit (GWT), JPA, and Java EE. Additionally, I utilized PostgreSQL, DB Beaver, and pgAdmin for database management.

I contributed to the development of a university web app using TypeScript, the Angular framework, and the OpenLayers library. I also played a role in creating an API using C# and .NET 5.

I contributed to the development of an employee fees management program using TypeScript, SCSS, HTML, and Angular. Additionally, I expanded RESTful services using Java to enhance the program's functionality.

I developed an Android app for interactive real-time sports data entry. I created two Android apps using Java, Android SDK, fragments, and ConstraintLayout. Additionally, I utilized Firebase for real-time database management, authentication, and storage, along with libraries such as AndroidPDFViewer, DroidNet, and ColorPicker. For the backend, I developed RESTful web services using Retrofit and leveraged SQL databases, including SQLite.