pos pos c#

I'm looking for a developer to help me create a POS POS C# system to run on more than one device. The programming language I'm using is C#; I already have a user interface, so the developer won't need to create one. Additionally, no 3rd-party API integration is necessary. The system must be robust to ensure it works seamlessly on devices from different hardware manufacturers. The coder should be knowledgeable in the C# programming language with experience of creating POS systems for multiple devices. If you feel like you are the right person for this job, please get in touch!