Job Description

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

Location: Location: Bangalore (Hybrid)

Experience: 5-10years

Domain: 5G RAN Small Cells / Protocol Stack

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")

1. 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

2. 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).