@Khan, Javeed For PaaS solution, theoretically, you should be able to the upload the exe file to a Windows App Service. The exe file can be executed in WebJob or triggered by a Function App. For more information, you can refer to below document.
https://learn.microsoft.com/en-us/azure/app-service/webjobs-create
For communicating with WebJob, it is recommended to use Queue messages. You can refer to below posts for more information and sample.
https://learn.microsoft.com/en-us/azure/app-service/webjobs-sdk-get-started
https://learn.microsoft.com/en-us/azure/app-service/webjobs-sdk-how-to