In a project system engineering team, come and take part in the development of an innovative and complete solution for the railway signaling environment! You will be involved in a human-sized team to define and improve a technical solution that will be adaptable to both high-speed lines as well as secondary networks of passengers or freight lines. This innovative solution includes an interlocking system, a complete ERTMS system (On board and trackside equipment) and interfaces with the supervision system, the field equipment, the communication networks, … Your main responsibilities will cover: Responsibility for definition of the technical vision on deployment activities at system level, but also for subsystems provided in the solution Participation in the definition of interfaces with the environment in which this signaling solution will be integrated Definition of strategy to optimize solution deployment and ensure consistency between technical view, deployment cost and installation cost. In this role, you will also help: The Railway team leader to ensure the authority of technical decision regarding both the generic aspects of the subsystem and developments related to specific requirements; The Go to Market team in answering to the offers (technical support); Finally, you will participate in the writing of the technical documentation of the solution and ensure close coordination with other technical experts on the products and subsystems interface.