Role scope

Join IS-Wireless as a 5G/6G System Architect and shape the architecture of next-generation mobile networks. You will define and evolve end-to-end system designs in line with 3GPP, O-RAN, ETSI and SCF standards, ensuring our products deliver high performance, openness, and interoperability. This is a strategic, hands-on role focused on developing multi-thread real-time/embedded systems that operate in virtualized environments (Kubernetes, Docker) to ensure critical connectivity. Perfect for an engineer who wants to lead innovation in telecom architecture through both design and implementation.

Responsibilities

• Define system architecture for 5G/6G RAN and Core, aligned with 3GPP, O-RAN Alliance, ETSI NFV and SCF FAPI/nFAPI specifications.

• Develop and implement multi-thread real-time/embedded systems with proficiency in design, documentation, implementation and unit tests.

• Build system architecture as software programs that operate in virtualized environments (Kubernetes, Docker) ensuring critical connectivity and high availability.

• Design and implement E2E Network/System Architecture in Open RAN based model with detailed recommendations for 3GPP and O-RAN features.

• Create end-to-end technical blueprints covering RAN functional splits, control/user plane separation, and cloud-native deployments.

• Guide engineering teams in implementing scalable, secure, and performant network functions (DU, CU, RIC, Core).

• Provide technical support for cross-functional teams implementing the features and define integration, verification, and validation strategies.

• Perform system-level performance analysis, capacity planning, and design optimizations.

• Ensure architectural compliance with open interfaces (O-RAN fronthaul, midhaul, backhaul) and interop with multi-vendor ecosystems.

• Contribute to standardization efforts and track emerging features in Release 17/18/19+ and pre-standard 6G work.

Requirements

• Strong C/C++ programming background and debugging skills for hands-on implementation work.

• Very strong knowledge about multi-thread real-time/embedded systems and proficiency in design, documentation, implementation and unit tests.

• In-depth experience with disaggregated and cloud-native RAN implementation architecture.

• Familiarity with ETSI NFV framework, MANO, and cloud-native orchestration (Kubernetes, CNF design).

• Deep knowledge of 3GPP specifications for 5G NR and Core (R15–R18, early 6G) and O-RAN standards.

• Strong understanding of O-RAN architecture, interfaces (OFH CUPS Planes, F1, E1, E2, A1, O1, O2), and RIC functions.

• Proven experience in designing large-scale telecom systems (RAN, Core, OSS/BSS or SMO integration).

• Familiarity with version control, bug tracking, and CI/CD systems.

• Understanding of security, reliability, and QoS in telecom-grade deployments.

• Excellent communication skills and the ability to work across multi-disciplinary teams.

• Very good English (spoken/written)

Additional Advantages

• Working experience with protocol stack splits (split 7.2x O-RU / O-DU, split 2 O-DU / O-CU).

• Knowledge of AI/ML integration into RAN (near-/non-real-time RIC use cases).

• Experience with edge computing, network slicing, and private 5G/6G solutions.

• Contributions to standardization bodies or open-source communities.

What We Offer

• Competitive salary package that grows with your experience and impact

• Access to world-class telecommunications knowledge base and comprehensive training resources

• Time for training, conferences, and self-development with ample opportunities for personal growth

• Opportunities for growth and advancement based on merit

• Ownership of cutting-edge, patent-worthy technology that shapes global connectivity

• Exposure to the latest technology and tools that push the boundaries of innovation

• Diverse, friendly, and talented international team of engineers and domain experts

• Collaborative, low-ego environment that rewards initiative and values your input

• Flexible working hours that promote healthy work-life balance

• Regular integration events that foster team bonding and camaraderie

About IS-Wireless

IS-Wireless is a top European deep-tech innovator, awarded the EIC Seal of Excellence and holder of 10+ patents. As a NATO DIANA 2025 innovator, we operate as a dual-use company, building ultra-resilient, secure and resource-efficient 5G networks for both industrial and tactical applications.

Our patented Liquid RAN technology represents a new generation of open, disaggregated radio access designed for exceptional reliability, flexibility, and resource efficiency. It enables rapid restoration and redeployment of base stations, even in volatile or degraded environments.

We value creative problem-solvers, unconventional thinkers and deep domain experts who thrive in demanding scenarios.