Cellular Certification Testing Lead

2 weeks ago

Bengaluru, Karnataka, India Larsen & Toubro Full time ₹ 8,00,000 - ₹ 12,00,000 per year

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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