Senior Lead / Principal Architect – 4G/5G L3 Stack Software
Location: Delhi and Bangalore
Experience Level: 12+ years in 4G/5G L3/Control-Plane Software Development
Domain: Telecommunications, 3GPP LTE & 5G NR Layer 3 Protocols (RRC, NGAP, S1AP, X2AP, XnAP, F1AP, E1AP), Open RAN (O-RAN), vRAN
Role Overview
We are seeking an experienced Senior Lead / Principal Architect – 4G/5G L3 Stack Software to design, architect, and deliver control-plane software and L3 protocols for LTE (eNodeB) and 5G NR (gNodeB) base stations. In this role, you will lead the architecture for radio resource management, signaling protocols, and inter-node interfaces across vRAN, O-RAN, and custom architectures. You will manage cross-layer platform integrations, drive large-scale product delivery programs, and lead root-cause defect investigations across complex multi-vendor cellular networks.
Roles & Responsibilities
Architecture & Feature Design: Architect, design, and code higher-layer control-plane features and protocol interfaces, including RRC, S1AP, X2AP, NGAP, F1AP, E1AP,
and XnAP for 4G LTE and 5G NR networks.
Defect Resolution & Field Engineering: Investigate and close complex control-plane failures, including attach/registration failures, handover drops, security-mode failures, RRC resume issues, paging misses, Xn/F1/E1 mis-synchronization, and UE/vendor-specific IOT issues.
Testing & Interoperability Campaigns: Work closely with verification, OAM, and Core Network teams to build call-flow validation models, stress testing scenarios, multi-vendor interoperability campaigns, and negative/failure-recovery tests.
Team Leadership & Mentorship: Mentor and review high-performance L3 engineering teams toward delivery excellence and robust code quality.
Program Management: Drive end-to-end 4G/5G L3 product development, field maintenance, and customer support programs across custom, vRAN, and O-RAN gNodeB/eNodeB deployments.
Stakeholder Engagement: Communicate effectively with senior in
📌 4G/5GStack Software (India)
🏢 Neev
📍 India