.Net Business Process Management Developer(BPM)

Question

Hello every one just 2 days before i gave an interview in a product base startup company ..i got selected on that startup so i need some reply from expert that what is the role of BPM Developer  ? Though i know java developer uses Pega tool for there work ,so can any expert tell me what are the tools are  uses for .net ? one more vital thing is that is there better career scope as a BPM developer?? Hope any expert can help me out ..please Response as soon as possible..Thanks In advance..