Location: Madrid (Mirasierra), on-site at first, then client site and/or remote
Experience: 1–2 years
Salary: €2*texto oculto* gross per year (negotiable for candidates who exceed the requirements)
Languages: Fluent English and Spanish. German is a plus.
About the role
Datatronics is hiring a Telecommunications Engineer for its Mobile Services Area. You will need a solid technical understanding of the end-to-end roaming environment. You will work on an international project focused on mobile connectivity across 3G, 4G and 5G networks.
What you’ll do
Test and monitor the performance and quality of mobile networks in international roaming.
Analyse results from end-to-end active testing and signalling monitoring tools.
Develop and redefine network KPIs, and take part in review meetings.
Present technical findings to customers and senior management.
What we’re looking for
A degree in Telecommunications Engineering, Communication Systems or a related field.




1–2 years of experience with mobile networks.
Good knowledge of signalling protocols: SS7, MAP, CAMEL, Diameter, GTP and VoLTE/SIP.
The ability to interpret data from signalling monitoring and tracing tools.
Fluent English and Spanish. German is a strong advantage.
Skills
Clear communication, both written and spoken, at a professional business level.
Confidence presenting to customers and senior management.
A collaborative approach and comfort working in a team.
Energy, creativity, and a willingness to take on new challenges and keep learning.
What we offer
A challenging role in a growing international project.
A competitive, high-performing team.
A hybrid setup after the onboarding period: client site and/or remote work, depending on the project.
A competitive salary, plus professional growth in 5G and international roaming.

📌 Junior Telecommunications Engineer – Mobile Roaming (3G/4G/5G) (Madrid)
🏢 THE WISE SEEKER
📍 Madrid