Cellular Certification Testing Lead

Actively Reviewing the Applications

Larsen & Toubro

India, Karnataka, Bengaluru Full-Time On-site INR 1–4 LPA

Posted 3 weeks ago • Apply by June 13, 2026

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".