Senior Software Engineer, 5G Protocol Stack
Ready to make connectivity from space universally accessible, secure and actionable? Then youve come to the right place!
E-Space is bridging Earth and space to enable hyper-scaled deployments of space-powered Internet of Things (IoT) solutions and services. We are fundamentally changing the design, economics, manufacturing, coverage limitations and service deliveryassociated with traditional satellite and terrestrial IoT systems.
By building a highly-advanced low Earth orbit (LEO) space systemwith a unique antenna design, highly sustainable spacecraft system and low-cost, small portable end-user deviceswe can extend global satellite coverage, capacity and connectivity beyond legacy space services to provide a new kind of IoT platform that lets users sense, track, connect and act on information gathered, anywhere.
Were intentional, were unapologetically curious and were 100% committed to saving space, protecting our planet and turning connectivity into actionable intelligence.
As a Senior Software Engineer, 5G Protocol Stack, you will design, develop, integrate, and validate UE and gNB protocol stack software for 5G NR and/or LTE systems. You will work across one or more 3GPP protocol layers and collaborate closely with PHY, RF, and Core Network teams to deliver production-quality embedded software.
This role requires strong expertise in C/C++ development, POSIX environments, Linux-based embedded systems, and deep familiarity with 3GPP protocols. You will take ownership of complex software components and contribute to system-level integration and testing. This position is based in Duisburg, Germany.
What you will do
- Protocol Stack Development
- Design, implement, and maintain UE and gNB protocol stack components for 5G NR and/or LTE
- Work in one or more protocol layers, including MAC, RLC, PDCP, RRC, NAS, Ng/S1, Xn/X2, and GTP-U
- Develop high-quality, maintainable C/C++ (POSIX-compliant) software
- Integration and Embedded Systems
- Integrate protocol stack components with the PHY layer and core network interfaces
- Perform embedded development and porting on embedded Linux, FreeRTOS, or Zephyr platforms
- Support system bring-up and end-to-end integration activities
- Verification, Testing, and Debug
- Develop and execute test cases for individual components and integrated subsystems
- Debug complex protocol, timing, and interoperability issues
- Verify functionality using test equipment and simulators such as Keysight, Amarisoft UE/gNB/eNB, or TM500
- Tooling, Build, and Workflow
- Work in Linux-based development environments
- Use and maintain build systems such as CMake, Make, or SCons
- Develop supporting scripts using bash or Python
- Participate in code reviews and continuous integration workflows
- Collaboration and Ways of Working
- Collaborate with cross-functional and geographically distributed engineering teams
- Provide effort estimates and technical input for planning and execution
- Document designs, implementations, and test results clearly and consistently
What you bring to this role
- Strong professional experience in C/C++ software development within POSIX environments
- Hands-on experience with 3GPP 5G NR and/or LTE protocol stacks
- Experience with embedded development on embedded Linux, FreeRTOS, or Zephyr
- Solid Linux development, debugging, and performance analysis skills
- Working knowledge of at least one scripting language (bash or Python)
- Familiarity with modern build systems (CMake, Make, SCons)
- Strong problem-solving skills and ability to work independently
Bonus Points
- Experience with C# / .NET
- Hands-on experience with test equipment (Keysight, Amarisoft UE/gNB/eNB, TM500)
- Experience integrating protocol stacks with RF hardware
- Familiarity with CI/CD pipelines and Agile / SCRUM development
- Experience with Non-Terrestrial Networks (NTN) or satellite communications
At E-Space, you’ll work on cutting-edge wireless and satellite technologies that redefine global connectivity. We offer a collaborative environment, competitive compensation, and opportunities to grow technically while making a meaningful impact.
Why E-Space is right for you:
We want you to make the most of your journey at E-Space. Thats why we support and invest in the physical, emotional and financial well-being of our team members and their families. Some of what you can expect when working at E-Space:
An opportunity to really make a difference
Sustainability at our core
Fair and honest workplace
Innovative thinking is encouraged
Competitive salaries
Continuous learning and development
Health and wellness care options
Financial solutions for the future
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