Hybrid Connectivity Systems Engineer – Architect

Your mission

Reporting to the CTO, you own the end-to-end system architecture of OIQ’s hybrid NTN-TN connectivity solution and its land-mobility MOVE product. You turn customer, mission and standards requirements into a coherent architecture spanning space segment, gateways, networks and user terminals, and steer it through integration, verification and deployment with internal teams, suppliers and partners.

1. End-to-end system architecture

• Architect the hybrid satellite-terrestrial (NTN-TN) solution, ensuring seamless interoperability for mobility and handheld use cases.
• Define, manage and trace user-terminal (edge/handheld) and gateway requirements into system architectures compliant with 3GPP (Rel. 15+, incl. Rel. 17+ NTN), ETSI, ITU and FCC.
• Own end-to-end mission interfaces: spaceborne platform and payload software, terminal RF control, protocol stacks, integrated modems and battery management.
• Lead the architecture of digital hardware (modems, modem accelerators, application processors), physical layer and protocol-stack software.
• Define network strategies for LEO/MEO/GEO constellations with 5G/LTE/RedCap, including RAN, core and transport design for low-latency, high-throughput connectivity.
• Specify feeder-link requirements for data and control exchange between TN and NTN; set spectrum-sharing, interference-mitigation and beamforming strategies.

2. Integration, verification & validation

• Guide network planning and simulation with the network design team.
• Write integration and system test specifications; oversee breadboard validation of critical building blocks.
• Steer lab, over-the-air (OTA) and drive testing, proof-of-concepts and demonstrations that prove NTN-TN interoperability.
• Safeguard end-to-end service provisioning and data-path integrity across the full RF communications chain.

3. Partners, suppliers & delivery

• Evaluate component and subsystem partners; coordinate external technical partnerships.
• Define system and subsystem sign-off for supplier and subcontractor deliverables: milestones, work packages, plan sign-offs and integration.
• Act as primary technical contact for cellular wireless development and deployment across OIQ’s partner and customer ecosystem.

4. Collaboration & mentoring

• Work closely with hardware, software and AI colleagues; maintain rigorous architecture documentation (e.g. GitHub).
• With the CTO, mentor working students, interns and extended team members on 4G/5G NTN-TN connectivity.

  Your profile

  Essential
• Bachelor’s, Master’s or PhD in Electrical Engineering, Wireless Communications, Telecommunications, Computer Science or a related field.
• 8+ years’ wireless systems-engineering experience, ideally in cellular handheld and satellite communications (telecom, aerospace or automotive).
• Deep knowledge of 3GPP (incl. Rel. 17+ NTN), 5G NR, LTE, NB-IoT, RAN, core (EPC/5GC) and transport networks.
• Strong RF and link-level expertise: beamforming, MIMO, waveform design, modulation (OFDM, QAM, DSSS), spectrum allocation, interference management and link budgets.
• Proficiency in MATLAB, HGSS, ADS, Ansys, Python, C++ or similar simulation tools; experience with embedded/IoT systems, edge AI and cloud-based telematics.
• Familiarity with RF test equipment and validation platforms (e.g. Keysight, Rohde & Schwarz, Viavi, Anritsu, Spirent, Amarisoft).
• Working knowledge of Jira, Confluence, GitHub and Microsoft 365; customer-oriented leader and clear communicator, comfortable with ambiguity.
• Fluent English; working proficiency in French or German. Valid driving licence (field testing and partner visits).

Preferred

• LEO/MEO/GEO satellite communications and network slicing; O-RAN, SDN and cloud-native 5G core.
• Electronically steered antennas, phased arrays, mmWave; V2X/C-V2X, edge computing and AI-driven network optimisation.
• Experience in automotive, rail, agriculture, fleet or aerospace connectivity; containerised networking (Kubernetes, Docker).

  Why OrbitsIQ?

  •30 days’ paid annual leave plus 24 and 31 December, in addition to Luxembourg’s 11 statutory public holidays (statutory minimum: 26 days).
• Competitive salary and Luxembourg social-security coverage (health, pension, accident insurance).
• Flexible working hours; hybrid work applied within cross-border telework thresholds for residents of France, Belgium and Germany.
• Real architectural ownership in a multinational, collaborative start-up with short decision paths, visionary leadership and a strong investor and partner network.
• Contribution to fitness or health-related activities, and support for professional development.

•A multinational, collaborative start-up with short decision paths, visionary leadership and a strong investor and partner network, and the chance to shape the future of mobility, handheld connectivity and space.