Role & responsibilities

Position/Title- L3 Developer

Overall exp- 2-8 Years

Any domain specification- TELECOM / WIRELESS /5G/4G/LTE

Qualification Criteria- BE/ B tech

Mandatory Skills- RAN, L3 Layer (PDCP, RRC), C++, 3GPP Specifications

Preferred Skills: Google Test Framework (GTF)

Work location- Bengaluru (Manyata)

Details JD-

Skill-set & Expertise Level
- Protocol knowledge: RRC, S1AP, X2AP
- 4G/5G Layer 3 Procedures Knowledge: attach, handover, re-establishment, carrier aggregation (CA), EN-DC/NR-DC
- Expertise in mobility control, measurement control & configuration, bearer/session signaling, reconfiguration, security activation flows, release, dual connectivity, idle/connected transitions, RLF handling, cell reselection, and paging/idle mode procedures and core-triggered session/bearer coordination and inter-node procedures for both LTE/E-UTRAN and NG-RAN/NR
- Knowledge of control-plane interfaces and procedures including S1AP/X2AP for LTE and NGAP/F1AP/E1AP/XnAP for 5G architectures, along with understanding of how RRC procedures interact with AMF/MME,



SMF/SGW-C/PGW-C
- Programming: C/C++/ Python Programming Language, memory pooling, Programming & Debugging state machine design, error handling, traceability, and robust interoperability engineering across different UE/chipset/core/network-vendor combinations, ASN.1/protocol decode workflows
- L3 data path expertise - GTPU, DPDK & VPP expertise
- Understanding of Linux Workplace, Inter-Process Communication (IPC), Processes, Threads, and Multithreading
- Knowledge of containerization (Kubernetes, Pods, and Docker)
- Experience in field issue analysis using RRC/NGAP/S1AP/F1AP/E1AP traces, Wireshark decodes, KPI dashboards, and log-correlation from RAN and core, and in translating issues into reproducible lab scenarios
- Knowledge of call-flow, ASN.1 handling, timer/state management, error recovery, and backward/forward compatibility across releases
- Log Analysis: Proficiency in analyzing system logs t

📌 Developer Telecom Wireless 5G 4G LTE (Bengaluru)
🏢 Idexcel
📍 Bengaluru