WideCoup BPMN Low-code engine, as a part of WideCoup Convergent BSS solution, is implemented modeling business scenarios with BPMN 2.0 and provides visual approach tool to low-code software development based on drag-and-drop components with a graphical interface logic, automatic integrations, and data usage mechanisms. At the same time, BPMN-based Low-code engine allows to use the development life cycle, all are familiar with, start from creating up to compiling with debugging, and finalize an executing. Various approaches for service-oriented business-to-business integration (B2Bi) rely on a top-down development methodology. The starting point is a choreography model which is subsequently partitioned into multiple orchestrations. Translating business scenarios into business processes is a very sensitive task due to understanding the technical implications that our decisions at the modeling stage will have when CSP wants to execute our process definitions.