Modem Test Engineer - LTE/5G Carrier Acceptance

L&T Technology Services; Mountain View (CA); On-site; USD 120,000 - 180,000; Full time

Job summary

L&T Technology Services in Mountain View, CA is seeking an experienced test engineer specializing in modem carrier acceptance testing for 4G/5G networks. You will work with industry-leading test platforms and drive validations for major operators.

The role requires hands-on debugging, test scope verification, and collaboration with junior engineers to ensure timely, accurate test results in a fast-paced environment.

Qualifications

• 5+ years of experience in modem carrier acceptance testing for major carriers (T-Mobile, AT&T, Verizon).
• Hands-on with R&S and Keysight 4G/5G test platforms for operator CAT.
• Test independently for debugging and scope testing; able to troubleshoot UE/TE setup issues and failures.
• Assist junior engineers to perform test correctly and give quick testing hints.
• Familiar with carrier protocol test procedures, requirements and certification timelines.
• LTE and 5G NR (SA/NSA) architectures, call flows, and protocols.
• Willing to work in a 24x7 shift environment including morning, evening, and night shifts.

Responsibilities

• Perform modem carrier acceptance testing for major operators.
• Troubleshoot and analyze UE/TE setup issues and failures.
• Mentor junior engineers and share testing tips.
• Ensure adherence to carrier protocol test procedures and certification timelines.

Skills

Modem testing carrier

LTE

5G NR

Debugging

Mentoring juniors

Tools

R&S test platforms

Keysight test platforms

Job description

L&T Technology Services in Mountain View, CA is seeking an experienced test engineer specializing in modem carrier acceptance testing for 4G/5G networks. You will work with industry-leading test platforms and drive validations for major operators.

The role requires hands-on debugging, test scope verification, and collaboration with junior engineers to ensure timely, accurate test results in a fast-paced environment.