Tech lead

L&T Technology Services Limited.; Bengaluru; On-site; INR 1,200,000 - 2,400,000; Full time

Job summary

L&T Technology Services Limited in Bengaluru seeks a skilled validation engineer to perform end-to-end validation of 4G LTE and 5G NR modem features in SA/NSA deployments, and to execute functional, regression, interoperability, and performance tests.

You will analyze protocol logs, validate VoLTE/VoNR/IMS, work with test platforms like Anritsu, Spirent, Keysight, and develop test automation using Python and Robot Framework.

Qualifications

• Experience validating 4G LTE and 5G NR modem features in SA/NSA deployments.

Responsibilities

• 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.

Skills

LTE/5G validation

Test automation

Protocol analysis

Software debugging

Tools

Anritsu MT8000A/MD8430/ME7834

Spirent

Keysight UXM/PXT

R&S CMW/CMX

QXDM

QCAT

Wireshark

Python

Robot Framework

PyTest

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.