5G NTN Test Engineer (Junior)

The Network Integration & Validation team leads Proofs of Concept (PoCs) with Mobile Network Operators (MNOs) worldwide, validating how Sateliot’s NTN and IPX services integrate into live 5G networks. This is a junior role, ideal for an early-career telecom engineer who wants hands-on exposure to real MNO integrations, lab and field testing, and end-to-end service validation - with the support of senior engineers on the team.

What you’ll do

• Support and help manage Proofs of Concept (PoCs) with Mobile Network Operators, both in the lab and, when required, on-site in the MNO’s country.
• Provide technical support during MNO integration processes, including IPX and NTN network elements.
• Execute test passes and service validations, ensuring alignment with integration requirements.
• Analyze and report test results, identify anomalies, and help propose technical solutions.
• Collaborate with internal engineering, product, and operations teams to resolve technical blockers during integration.
• Contribute to documentation of procedures, integration steps, and lessons learned from each MNO onboarding.
• Act as a technical point of contact with MNO technical teams during integration and validation activities, under the guidance of senior team members.

• Degree in Telecommunications Engineering (or final-year student / recent graduate).
• Familiarity with IPX networks, 5G networks, roaming setup, and interconnection models (through coursework, internships, or early professional experience).
• Basic knowledge of IP networking protocols (IPv4/IPv6, DNS, routing, VPN).
• Exposure to testbeds and telecom monitoring tools (e.g., Wireshark, protocol analyzers).
• Basic Linux user skills.
• Strong communication and coordination skills - you’ll work with international MNOs and technical partners.
• Analytical and troubleshooting mindset applied to telecom environments.
• Ability to manage tasks independently and juggle parallel technical activities.
• Availability to travel when needed for PoCs and integration projects abroad.
• Good level of English (spoken and written); additional languages are a plus.

Preferred experience:

• Understanding of mobile and satellite communication protocols, including NB-IoT, LTE-M, 3GPP NTN, and LEO technologies.

Additional requirements

• English proficiency: professional working proficiency in written and spoken English.
• Location: based in Barcelona; hybrid work model.
• Operational availability: occasional travel abroad for PoCs and MNO integration activities.

• Full-time permanent contract.
• Hybrid work model, with schedule flexibility - we focus on results, not hours.
• Flat and transparent organizational structure.
• Buddy Program to support your integration during your first month.
• Growth: we cover 50% of courses or master’s degrees (up to 5% of your salary), plus Spanish and Catalan classes.
• Health & balance: 50% on private health insurance and Urban Sports Club, fresh fruit in the office, and the possibility of sharing the cost of bicycle transport.
• Flexible compensation through Cobee (meal, transport, kindergarten).
• Catering: if you don’t have time to cook, we partner with a catering company so a fresh meal is sorted.
• On-site parking, with Sateliot covering 50% of the cost - plus free bike parking.
• A truly global team: 20+ nationalities building something genuinely new.
• The chance to be part of one of the most exciting and disruptive space projects in Europe.

Sateliot is a Barcelona-based satellite company with one goal: connect everything, everywhere. Founded in 2018, we’ve built the first satellite constellation that lets standard commercial devices communicate directly from space. Our technology bridges the gaps that terrestrial networks will never reach, bringing affordable and secure connectivity to industries, governments, and communities across the planet. Learn more: https://sateliot.space