Location: Madrid (Work center in Arganda del Rey) ️ Modality: Hybrid (60% on-site) ✈️ Frequent travel: 2–3 short trips per month (1 to 4 days) across Europe Are you ready to shape the future of 5G and satellite communications? At Exceltic, we are hiring a Core Network & Network Senior Engineer with strong telecom and satellite background to join an ambitious project involving 5G Core Networks and Non-Terrestrial Networks (NTN). You’ll be part of a high-tech, international team working at the forefront of telecom innovation. ️ Main Responsibilities Define 5G Core Network system requirements for a multi-orbit satellite system. Define the high-level software and hardware architecture of the 5G CN. Prepare implementation and testing plans for proposed subsystems. Provide technical oversight to subcontractors on: ▪ Design & architecture ▪ Requirements compliance ▪ Development and validation Support the integration of subsystems into the full system architecture. Requirements 3 to 5 years of experience in the telecom industry. Deep understanding of mobile network architecture : ▪ Core Network (CN) ▪ Radio Access Network (RAN) ▪ Ancillary services Strong knowledge of 5G Core Architecture. Proven experience with 3GPP standards and implementation of Core Network subsystems: ▪ Resource allocation ▪ Service orchestration ▪ Control plane interfaces Experience in development and testing of 4G/5G systems. Expertise in virtualization and cloud platforms. Understanding of satellite communications. Experience in technology R&D project management. Solid knowledge of 5G-NTN and New Radio Non-Terrestrial Networks. EU nationality and willingness to undergo EU Secret Clearance. Fluent in English (spoken and written); additional European languages are a plus. Living the Exceltic experience means: ✅ Working on innovative, high-impact telecom and space projects. ✅ Access to a flexible compensation plan tailored to your needs. ✅ A healthy balance between your personal and professional life. ✅ Joining a collaborative team where your ideas and talent are valued. About Exceltic… At Exceltic, we are leaders in engineering and technology consulting, operating across sectors such as railway, aerospace, industry, energy, and IT. With over 500 professionals and offices in Madrid, Barcelona, Valencia, and Bilbao, we participate in cutting-edge projects across five continents. Join us and help shape the future with Exceltic! Interested in leading the next wave of telecom innovation? Apply now via LinkedIn or send us your CV.