System Architect

IS-Wireless

System Architect shaping next-gen 5G/6G mobile networks at IS-Wireless. Defining architecture and implementing real-time systems for ultra-resilient connectivity.

Posted 6/18/2026full-timeRemote • 🇵🇱 PolandMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

CloudDockerKubernetes

About the role

Key responsibilities & impact

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

What you’ll need

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)

Benefits

Comp & perks

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

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

CC++multi-thread systemsreal-time systemsembedded systemsdesign documentationunit testscloud-native architectureperformance analysiscapacity planning

Soft Skills

communication skillscross-functional collaborationleadershipproblem-solvingteam guidance