Infrastructure Network Senior Engineer

Sateliot is a Barcelona-based Startup in the New Space sector, becoming the

first satellite telecommunications operator

that will provide

global and continuous connectivity

to all the elements that will make up the massive Internet of Things (IoT) universe under the 5G protocol

Sateliot is the perfect complement for large telecommunications companies by providing them with the necessary infrastructure where terrestrial technologies do not arrive.

As a Core Network Engineer at Sateliot, you will be a key player in the evolution and operation of our unique satellite-based 5G Core Network. Your mission will be twofold : first, to enhance and optimize our current EPC for our current satellite missions, ensuring stability and introducing new, critical features for our Store & Forward service. Second, you will play a pivotal role in investigating, designing, and defining the implementation roadmap for the next evolution of our Core Network. Contribute to the development, maintenance, and optimization of our existing Core Network.

Troubleshoot and resolve complex technical issues related to the core network and services during development and operational phases.

Collaborate with cross-functional teams (RAN, Payload, DevOps) to ensure seamless integration and deployment of CN software updates.

Conduct testing and validation of core network functionalities to ensure compliance with specifications and standards.

Participate in the investigation and evaluation of system requirements for the evolution of the Core Network.

Drive the architectural design of the evolution of the Core Network, considering scalability, support for new operational modes.

Open5GS) and commercial platforms.

Identify essential protocols, interfaces, and functionalities for the next-generation 4G / 5G core network.

Contribute to the documentation, presentations, and knowledge-sharing activities related to the core network domain.

Support network trials and proof-of-concepts (PoCs).

Master's degree in Telecommunications, Electrical Engineering, Computer Science, or a related field. In-depth knowledge of 3GPP standards for 4G (Release 11-15) and 5G (Release 15-19), with focus on the core network architecture, protocols, and call flows.

Solid knowledge of 4G / EPC core network elements (MME, S-GW, P-GW, HSS) and 5G Core (5GC) architecture (AMF, SMF, UPF), related interfaces and protocols (S1-AP, NAS, GTP-C / U, Diameter).

C / C++) and scripting languages (e.g., Python) for prototyping, testing, and automation.

Solid knowledge of network protocols and technologies, including IPv4 / IPv6, TCP / IP, UDP, SCTP.

Ability to work independently, drive initiatives, and adapt to evolving technologies and project requirements.

Proficiency in English is mandatory.

3+ years hands-on experience in telecommunications, with emphasis on integration, configuration, and testing of 3GPP wireless core networks.

Hands-on experience with roaming configurations and inter-PLMN connectivity solutions

Proven experience with open-source core-network platforms (e.g., Proven experience in network troubleshooting and root-cause analysis through network diagnostics tools, e.g., Wireshark, packet sniffers, performance monitoring systems, etc.

Experience with Direct-to-Device (D2D) or Non-Terrestrial Networks (NTN) integration and testing is highly desirable.

Docker, Kubernetes).

Experience with network simulation / emulation and testing tools for validating core network functionalities.

Experience with Agile development methodologies.

You will be part of one the fastest-growing start-ups in Spain with global reach along getting into the challenging world of New Space & Telecommunication.

Full time permanent Contract

• Hybrid Work Model &##128187;
• Tax benefits with ticket restaurant, transportation and kindergarten, training programs.&##We promote good physical and mental health, with a Health insurance, Fresh fruit in the office and the possibility of sharing the cost of bicycle transport or gyms.&##The chance to be part of one of the most exciting and disruptive space projects in Europe &##128640;