Custom app in manufacturing apps creation

Hi,

I think my question might be more about the fundamental of how thingworx work and what we can do with it.

Is there a way to develop an app programmatically (let say with JAVA) using a thingworx SDK and make it run on the platform ? Or do we need to develop everything directly with ThingWorx Composer ? If we can deploy custom app in JAVA, can we also use third-party libraries ?

Sorry if the question doesn't make sense, I'm trying to understand how ThingWorx work.

Thanks,

Gringet.