Recommendations / best practices for user tasks and (external) task list application

[StephenOTT]

Yes.
It works the same as the picture in this post:

Form Builder (Drag and Drop) + Form Server Validations

So this is some details about a project we are working on to provide Camunda with a Form Builder. This has been raised by others in the past: Redirecting to Google Groups. The purpose is to solve two problems: Ability to easily create the equivalent of Camunda Embedded Forms using a “Drag and Drop Form builder”, but also allow those same forms to be built using pure JSON. Provide a single language (javascript) to create Client Side and Server Side validations (so the server can validate …

Except replace Tasklist with the Portal Angular Web application (GitHub - DigitalState/Portal: The DigitalState Portal Spa), and Camunda Server with the Services Microservice(GitHub - DigitalState/Services: The DigitalState Services Microservice).

It looks like this:

User 1 == Angular App
OroBap == Services Microservice

Formio and Camunda is never directly exposed to the client side. The Service Microservice fronts everything.