Integrate Camunda BPM in existing webapp

Hi everybody
i have recently started to look into the BPM and camunda world, with the intention of leveraging their functionalities for an existing java standalone webapp
the goal would be refactor the webapp (even changing its architecture to microservices if needed) in order to take full advantage of the bpm model and camunda framework

hence my question: is it feasible? I wonder because i didn’t find a way to use camunda api for building the frontend, since for my requirements i cannot make use of the camunda webapp, i already have one and i want to use that to manage my processes/task and whatnot, instead of the camunda default one

can you please shed some light on that
Thank you in advance

@FabioPortieri refer to the below post,it might help you with general idea.