LTTS India

Bangalore

Job Description
Perform end-to-end validation of 4G LTE and 5G NR modem features in SA/NSA deployments.
Execute functional, regression, interoperability, performance, and carrier acceptance testing.
Analyze protocol logs and debug issues involving RRC, NAS, IMS, SIP, PDCP, RLC, MAC, and PHY layers.
Validate VoLTE, VoWiFi, VoNR, IMS, NTN, Carrier Aggregation, Mobility, Handover, Network Slicing, and emergency services features.
Conduct protocol conformance and carrier certification testing as per 3GPP and operator requirements.
Work with test platforms such as Anritsu MT8000A/MD8430/ME7834, Spirent, Keysight UXM/PXT, and R&S; CMW/CMX.
Perform root cause analysis using QXDM, QCAT, Wireshark, PA3, and other protocol analysis tools.
Collaborate with chipset vendors, development teams, and carrier/operator labs to resolve issues.
Develop and maintain test automation using Python, Robot Framework, PyTest, Shell scripting, or similar frameworks.

Job Requirement

Python, modem

📌 Tech Lead Bengaluru (India)
🏢 L&T Technology Services
📍 India