Java Desktop Application Development

I'm looking for a proficient developer to create a desktop application using Java. I have a youtube link for this open source app i want to edit some points. This application must have the following functionalities:

Main Functionality:
- POS

Skills And Experience:
- Mastery of Java
- Experience with desktop applications
- Excellent problem-solving skills

If you fit this description, I would love to hear more about your experience and how you would approach this project. Let's talk details.

Please send your proposal with relevant examples of your work. Don't hesitate to reach out if there are any questions. Thanks!