.NET Monri–Dynamics 365 Connector

I want a robust .NET application that lets Microsoft Dynamics 365 Business Central talk to our Monri payment terminal in real time. Every sale or refund entered in Business Central should instantly trigger the same action on the terminal, return an approval or decline, and then write the response back to Dynamics so we can generate accurate transaction reports on demand.

Because the solution will be used by store staff, it needs a straightforward graphical interface—nothing fancy, just clear fields for transaction details, live status messages, and an area where users can pull a day-end report. Under the hood I expect solid error handling, logging, and an easy way to adjust endpoint settings without having to recompile.

Please build in clean, well-documented C# code (I work mainly with .NET 6+ and would like to keep that stack) and package the finished app with a simple installer plus source in a Git repo. Once this first connector is stable, I’ll commission several similar integrations, so I’m looking for someone who wants an ongoing partnership and can keep improving the product line as new payment devices or ERP updates appear.

If this sounds like a good fit, let me know how you would approach the real-time handshake with Monri, your preferred GUI framework, and any previous experience you have integrating with Business Central APIs.