STACK-L3(4G/5G)

Talent Basket · India

Key Responsibilities

• Architecture & Design: Design and implement 4G/5G control-plane protocols, including RRC, S1AP, X2AP, NGAP, F1AP, E1AP, and XnAP.
• Technical Leadership: Guide and mentor engineers in root-causing L3 issues like attach failures, handover drops, security activation errors, and RRC resume/paging issues.
• Cross-Functional Execution: Partner with verification, OAM, and core network teams on call-flow validation, negative testing, and interoperability campaigns.
• Program Leadership: Drive large-scale L3 software delivery, product maintenance, and customer support for multi-variant RAN systems.

Required Qualifications

• Experience: 12+ years in 4G/5G L3 software development with leadership experience driving complex delivery programs.
• Core Protocols: Deep expertise in 3GPP specifications for LTE (36.series) and 5G NR (38.series) L3 layers.
• Control-Plane Signaling: Mastery over mobility control, bearer/session signaling, dual connectivity (EN-DC/NR-DC), cell reselection, RLF handling, and core-network coordination.
• Software Engineering: Strong proficiency in C/C++, Python, state-machine design, memory pooling, and multi-threaded Linux environments.
• Data Path & Cloud: Knowledge of GTP-U, DPDK, VPP, and containerization platforms (Docker, Kubernetes).
• Log Analysis & Tools: Hands-on experience with Wireshark, QCAT, Viavi, Spirent Landslide, and IxLoad for trace-level triage