Junior Ran Software Engineer

September 22, 2026

Office

Junior

Barcelona, Spain

Important before applying

This job has conditions that may affect your decision to apply

Office-only work

Description

The company builds the first satellite constellation that lets standard commercial devices communicate directly from space, bridging the connectivity gaps terrestrial networks never reach. As Junior RAN Software Engineer you will work on an in-house 5G NR non-terrestrial test terminal side by side with a senior engineer and own its test and validation pipeline. The position is deliberately designed as an entry path into radio access software and is lab-based and on-site at one of the company's engineering locations.

Responsibilities

Build and extend the 5G NR NTN test terminal software together with the 5G stack architect as reviewer
Own the test and validation pipeline: automation, continuous integration, regression runs and analysis of results
Drive integration step by step — terrestrial first, then satellite GEO and LEO over a software channel emulator, then over RF with a physical emulator
Work AI-first: orchestrate AI-assisted development and defend every line that ships
Grow into the domain and become a radio access software engineer with mentoring

Requirements

Degree in telecommunications, electronics or computer engineering
Solid C or C++ and Python for tooling
Foundations in mobile radio protocols — LTE or 5G
Genuine willingness to work from the 3GPP specifications
Something real you have built and can walk through, such as a thesis, personal project or internship, explaining your design decisions
Comfortable around hardware, logs and software-defined radios, with hands-on lab curiosity
Practical AI skills paired with creative problem-solving
Bonus: open-source radio access software projects such as srsRAN or OpenAirInterface
Bonus: Linux and embedded development or software-defined radio projects
Bonus: interest in satellite communications and non-terrestrial networks
Bonus: version control and CI practice beyond the classroom

Conditions

Lab-based and hands-on role that is on-site, sitting with the engineers at one of the engineering locations
Selection process includes a short practical exercise using AI assistance
Company covers 50% of courses or master's degrees, up to 5% of salary, plus Spanish and Catalan classes
50% on private health insurance and Urban Sports Club
Flexible schedule and hybrid work, with focus on results rather than hours
Flexible compensation through Cobee for meal, transport and kindergarten
Global team of 20+ nationalities
Dedicated buddy from day one
Leisure and sports activities both during and outside working hours
Catering partnership so a fresh meal is sorted
On-site parking with 50% of the cost covered, plus free bike parking

CC++Python5G NRLTE3GPPNTNCIsatellite communicationssrsRANOpenAirInterfaceLinux

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