RAN Tester - Feature Tester

About the Role: We are seeking a highly experiencedSenior Wireless Systems & RAN Product Validation Engineerto lead end-to-end feature validation, call flow testing, and network readiness for next-generation LTE and 5G deployments across North American operators. This role sits at the intersection oflab validation, feature integration, and live network readiness, ensuring that new radio technologies are fully validated—from protocol-level call flows to real-world deployment behavior—before reaching commercial networks. You will collaborate closely with vendor engineering teams, system architecture, and operator stakeholders to ensure flawlessfeature introduction, interoperability, and performance stabilityacross multi-vendor RAN environments.

Key Responsibilities: End-to-End Feature & Call Flow ValidationLeadend-to-end LTE and 5G feature validation, including protocol-levelcall flow analysis (RRC, NAS, X2/Xn, S1/NG interfaces)across lab and pre-production environments Validate fullservice lifecycle call flows, including attach/detach, handover, mobility events, bearer setup, and session continuity Perform deepfeature-level testing of RAN capabilities, ensuring compliance with 3GPP specifications and operator requirements Analyze signaling flows using network tools and logs to identify defects, inefficiencies, and interoperability issues Lab-to-Live Product IntegrationDriveNew Product Introduction (NPI)testing for LTE/5G RAN hardware and software releases Execute integration andfeature acceptance testing (ATP)in lab environments prior to field deployment SupportFirst Office Application (FOA)readiness and controlled rollout validation for new radio technologies RAN System Validation & TroubleshootingValidate macro and small cell RAN deployments includingBBU, RRH, and next-generation radio units Troubleshoot complex multi-layer issues across RAN, transport, and core interfaces Performroot cause analysis (RCA)on feature failures, call drops, handover issues, and performance degradation Support Tier-3 escalation for live network performance and stability issues Network Performance & KPI AssuranceMonitor and validate key performance indicators (KPIs) post-feature activation Ensure feature introduction does not negatively impactnetwork accessibility, retainability, mobility, or throughput Conduct comparative analysis of pre- and post-release performance metrics Collaborate directly withvendor engineering teams (e.g., Ericsson)on feature design, defect resolution, and roadmap validation Partner with system architecture and RF engineering teams to align feature behavior with network design intent Interface with operator engineering teams to ensure readiness for commercial deployment Develop and enhanceautomation scripts and tools (Python, UNIX/Linux environments)to accelerate test execution and regression cycles Improve validation efficiency through automated log parsing, KPI extraction, and test case execution frameworks Support continuous improvement of validation methodologies and lab processes Documentation & Technical ReportingExecute structuredTest Object List (TOL) and Acceptance Test Plans (ATP) Prepare detailedfeature validation reports, call flow diagrams, and technical summariesfor stakeholders Present findings, defect analysis, and readiness assessments to engineering and customer leadership teams 10–15+ years of experience in LTE/5G RAN engineering, validation, or system integration Deep understanding ofend-to-end call flows and 3GPP signaling procedures Strong expertise inRAN feature validation, NPI cycles, and FOA readiness Experience with multi-vendor environments and large-scale operator deployments Hands-on troubleshooting ofRAN interfaces (X2, Xn, S1, NG, backhaul/IP transport) Proficiency with LTE/5G lab tools, log analysis, and performance debugging Working knowledge of automation tools (Python, UNIX/Linux scripting preferred) Strong analytical skills with ability to isolate protocol-level failures across complex networks Excellent communication skills for cross-functional and customer-facing collaboration Preferred BackgroundExperience supporting Tier-1 wireless operators in North America Prior work with Ericsson or similar RAN vendors Experience inlab-to-field validation environments supporting large-scale commercial rollouts Background in bothlegacy (CDMA/LTE) and modern 5G SA/NSA architectures