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Tech Stack
Tools & technologiesLinuxNode.jsC++
About the role
Key responsibilities & impact- Write and maintain C++ code for 5G NR upper-layer and core interface protocols, including PDCP, eGTP-U/C, XnAP, and NGAP
- Learn and contribute to NTN-specific PDCP adaptations
- Support eGTP-U tunnelling work for the N3 user plane
- Contribute to XnAP interface procedures, including setup, UE context retrieval, handover preparation, and node configuration updates
- Contribute to NGAP procedures over N2, including UE messaging, context management, paging, and handover signalling
- Build test cases, simulation harnesses, and automation against 3GPP specifications
- Support Core Network and MNO integration teams in validating NGAP procedures
- Validate Xn/N2/N3 interfaces end-to-end across disaggregated vRAN and core network elements
- Debug interface-layer issues using Wireshark, tcpdump, custom dissectors, GDB, and log analysis
- Read 3GPP Rel-17/18 NR-NTN specifications and translate them into software requirements
- Participate in code reviews, architecture discussions, and technical documentation
- Use AI coding assistants across development, testing, and code review
Requirements
What you’ll need- Bachelor's, Master's, or PhD in Electrical Engineering, Wireless Communications, Telecommunications, Computer Science, or a closely related field
- Strong programming ability in C++ with non-trivial C++ experience and understanding of memory management, pointers/references, and the standard library
- Working knowledge of networking and communications fundamentals, including the protocol stack model, IP, UDP/TCP, tunnelling, and packet-based signalling
- Familiarity with 5G or LTE architecture, including RAN vs. core, control plane vs. user plane, and handovers
- Comfortable working in Linux and with Git
- Curiosity and persistence when debugging
- Willingness to work from 3GPP specifications
- Clear communication and appetite to learn
- Prior professional experience is a plus, not required
- Candidates must be within 50 km of Espoo, Finland or willing to relocate
Benefits
Comp & perks- Competitive compensation packages
- Occupational Healthcare and Health and Life Insurance
- E-passi including wellness, culture, lunch and commuting benefit
- Phone & Internet allowance
- Individual learning & development budget for further personal and professional development
- Flexible approach to work
- Mentorship from senior engineers
- Inclusive and diverse workplace culture