Senior SW Developer

Ericsson

Location not specified

Posted: February 9, 2026

Required Skills

Job Description

Grow with us
About this opportunity

We are looking for Senior Software developers in the area of 5G Core Network, with passion for building new functionalities related with 5G mobile data processing (especially, in the programming of open platform, real time and high-availability systems).

If you are a curious professional, willing to learn and share knowledge, and an excellent team-player, continue reading!

What you will do

You will work in a cross-functional team in the development of new functionalities for 5G User Plane,

Participate the full life-span of the software feature: from early phases (analyzing the solution and setting requirements), development phase (coding and testing), and final deployment on live network (supporting customer teams).

Be part of a multinational organization, with teams distributed in Spain, Sweden, and China.

You will bring
A bachelor’s, master’s, or doctorate degree in computer science, telecommunication engineering or related field
Willing to or being already proficient in programming of open-platform, real-time and high-available systems, as well as scripting.
Programming in C, and at least one scripting language (i.e. python, shell/bash) on UNIX/Linux is required.
Knowledge in TCP/IP Networking, and evolution transport protocols (like QUIC), data networks and IP-based applications (HTTP, HTTPS, ...), Routing and Signaling.
Capacity to investigate and debug complex issues. Including performance tuning experience, troubleshooting, core dump analysis, etc.
Cloud native software stacks and execution environments. Containers (i.e. Dockers).
Knowledge in operating system architectures and capacity to model scalable designs and solutions.
Good written and spoken English, confident working in international environments.

Competences of extra value:
Advanced Linux user and network administrator
Experience in configuration of network equipment
Knowledge in Mobile network architecture 4G/5G. Interfaces, protocols, functions
C++ and/or Golang
Knowledge in Link-layer protocols: ARP, ND, BFD (Routing and L2-L4 protocols)

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