Hey guys I am totally new to bot building especially with botpress. I want to know if its possible to build a SAAS all on botpress and build a customized UI for it.

you can use the Botpress SDK to build a bot directly into a product or service

For example I am currently building a chatbot that helps lawyers with their daily tasks such as legal document generation and legal research. Now, I am asking if its possible to present the bot not as a chatbot but a software with a UI that has customized buttons that interact with the bot to do specific things. Hope this makes sense

I'm not sure what the scope of your project is but you can indeed do these things with Botpress, yes!

Okay, is there an easy way to let users upload files such as Doc and PDF to a botpress chatbot so that the information on the files can be used in the conversation flow?

not end-users, no - we don't currently support native file ingestion

Okay, thanks