• 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.

Python, modem