Hi @Joseph , https://github.com/projectkudu/kudu/wiki/WebJobs may help to understand how WebJobs work and can be configured. Since you're looking to execute an actual exe, you may need to...
a) Create a console app that will act as a wrapper that will call CuraEngine.exe
b) Create a bat/cmd/sh script file that will execute $command
If CuraEngine.exe doesn't require any dependencies that need to be installed, you should be okay. Just note that App Services does have certain limitations since it is a sandboxed environment.
It is simple to apply. After creating your app service, you can click on the WebJobs blade, configure the trigger type, and upload your files as zip file. If you run into any issues or have further questions, please feel free to comment down below.
Regards,
Ryan