💼 Full-Time Position

Junior Researcher - Doctoral Candidate

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Telefónica, S.A.
📍 madrid, comunidad de madrid, Spain
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Location
madrid, Spain
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Posted
June 02, 2026
Type
Full-Time
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Full-Time Opportunity: This is a permanent, full-time position with a competitive package and real career growth potential.

Job Description

Junior Researcher – Doctoral Candidate

Security- and Sovereignty-Aware Spectrum Operations in Multi-Operator 5G Networks

We are seeking a junior researcher to work on security- and sovereignty-aware spectrum operations in multi-operator 5G networks as part of an international Doctoral Training Network.

SpecX ( is a prestigious Marie Skłodowska‑Curie Actions Doctoral Network (MSCA‑DN), funded under Horizon Europe, that provides a high‑level research programme and doctoral training to 15 Doctoral Candidates across leading European universities and research institutions. The network focuses on large‑scale spectrum measurements, AI‑empowered analytics, and applications in future telecommunications infrastructure, including 5G and emerging 6G systems.

This doctoral position aims to analyse how roaming security vulnerabilities and cloud sovereignty constraints affect the reliability, trustworthiness, and performance of spectrum‑dependent 5G services in m...