Cellular Certification Testing Lead

4 days ago

Bengaluru India Larsen & Toubro Limited Full time

Job Description Job Summary: We are seeking a skilled 4G/5G Cellular Certification Testing Engineer with experience in both manual and automation testing for cellular protocols, along with hands-on expertise in certification processes such as PTCRB, GCF, FCC, and carrier certifications (e.g., Verizon, AT&T, T-Mobile). The candidate will be responsible for leading device testing, automation framework development, and managing end-to-end certification cycles. Key Responsibilities: . Perform manual and automated testing of 4G/5G protocol, RF, and application level functionalities. . Lead and execute certification testing processes including PTCRB, GCF, FCC, and carrier certifications (AT&T, Verizon, TMO, etc.). . Design and implement automation test scripts and frameworks for cellular device testing (using Python or other scripting languages). . Conduct regression, stability, IOT (Interoperability Testing), and field testing using test tools and automation setups. . Debug and analyze logs using QXDM, QCAT, QTRACE, Wireshark, and similar tools. . Collaborate with cross-functional teams including development, QA, certification labs, and carrier teams to address and resolve test issues. . Maintain detailed documentation for test plans, test cases, defect logs, and certification reports. . Stay up to date with the latest 3GPP standards, carrier requirements, and certification processes. Required Skills & Experience: . 10 + years of hands-on experience in 4G/5G mobile device testing and certification. . Experience with PTCRB, GCF, FCC, and at least one US carrier certification process. . Strong understanding of LTE, LTE-A, 5G NR (NSA/SA), VoLTE, VoNR technologies. . Proficiency in using test tools such as Anritsu, Keysight, R&S, Spirent, etc. . Experience with automation testing frameworks and scripting languages (preferably Python, but Shell, Perl, or JavaScript also valued). . Hands-on experience with log analysis tools (QXDM, QCAT, etc.) and debugging protocol/RF issues. . Good understanding of 3GPP protocol stack, network signaling, and call flows. Preferred Qualifications: . Experience working with major chipset vendors (Qualcomm, MediaTek, etc.). . Prior work on test automation frameworks for embedded/mobile device testing. . Knowledge of test case management tools and CI/CD tools (Jenkins, Git). Sensitivity: This is Classified as LTSCT Internal Use.

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