I am looking for an electronic engineer to develop Firmware and hardware for a personal project

Firmware and hardware development for security team 5.0 with coordination of tasks. I am looking for an electronic engineer to develop Firmware and hardware for a personal project. In addition to the development of electronics, he must know how to coordinate different areas of the project. Currently there are three freelancers working on the project; Backend, Frontend (Mobile App) and Mechanic. I am looking for a proactive professional who knows how to understand the link between the three areas from a technical point of view and coordinate properly. The device we are developing is similar to an electronic lock with local (RF, bluetooth) and remote (WiFi, GPRS) control. The project is already started, it is to replace another professional, so I urgently need to find the right person. Spanish language essential. Greetings.