5G RAN Engineer

Job Title: Senior 5G Network level Engineer (E2E RAN experience )

Location: Bangalore

Experience: 5-10 years

Role Summary

We are looking for a technically superior 5G Engineer who bridges the gap between standardization theory and practical network implementation. You will not just execute tests; you will validate the 5G Small Cell system against strict 3GPP Release 15/16/17 specifications and IETF RFCs. You will be responsible for E2E system testing on real network elements, using your deep knowledge of the protocol stack and AI-driven automation to debug complex Call Processing and Interoperability issues.

Core Technical Competencies (The Must-Haves)

Good 3GPP & Protocol Knowledge:

Spec Literacy: Ability to read, interpret, and debug against specific 3GPP Technical

Specifications, specifically:

o TS 38.331 (RRC): Deep knowledge of SIBs, RRC Setup, Reconfiguration, and

Measurement Reports.

o TS 38.413 (NGAP) & TS 38.423 (XnAP): Handling Core Network signaling and Inter-

gNB communications.

o TS 24.501 (NAS): Understanding Registration, PDU Session Establishment, and

Service Requests.

IETF RFCs: Understanding of Transport and Security protocols for SeGW integration,

including IKEv2, IPsec (ESP/AH), and SCTP.

RAN Feature Expertise:

Complex Call Processing: Proven expertise in debugging the full lifecycle of ENDC

(NSA) and SA Option 2 flows.

Mobility Algorithms: Technical understanding of Event A3/A4/A5 triggers, Handover

Command/Complete flows, and failure scenarios (Radio Link Failure, HO ping-pong).

Advanced Features: Setup and debugging of CBRS (SAS/Domain Proxy interactions), VoNR,

EPS Fallback, and PTP (1588v2) synchronization.

Key Responsibilities

Standards-Based Validation:

o Execute E2E test plans on real gNB and Femto Gateway hardware, ensuring every

signaling message complies with defined standards.

o Analyze protocol traces (L2/L3) to identify deviations from 3GPP specs during

feature integration.

Root Cause Analysis (RCA):

o Use QXDM, Wireshark, and QCAT to dissect logs at the bit-level (ASN.1 decoding).

o Debug intricate issues such as Throughput drops (RLC/MAC layer analysis), S1/NG

setup failures, and Security Gateway tunnel establishment issues.

Automation & AI-Assisted Engineering:

o Python/Robot Framework: Write scripts to automate complex protocol flows (not

just UI automation).

o AI Integration: Leverage AI tools (LLMs) to parse large PCAP files, generate regex for

log mining, and summarize complex failure signatures from regression data.

Network Element Configuration:

o Full ownership of Lab setup including cOAM configuration, Certificate Management

for SeGW, and Core Network (5GC/EPC) simulator tuning.

Tools & Technologies

Protocol Analyzers: Wireshark (Advanced filters/Lua scripting), QXDM, QCAT, XCAL/XCAP.

Scripting: Python (Pandas for log analysis, Scapy for packet manipulation), Shell scripting.

Standards: 3GPP Rel 15/16, IETF RFCs (IPsec/Networking).