Job Title: Vendor Engineer Cellular / WWAN Validation
Debug
Location: Redmond, WA
Onsite/ Hybrid/ Remote: Onsite
The salary for this role is $65000 to $95000 per annum including any bonuses or variable pay. Tech Mahindra also offers benefits like medical, vision, dental, life, disability insurance and paid time off (including holidays, parental leave, and sick leave, as required by law). Ask our recruiters for more details on our Benefits package. The exact offer terms will depend on the skill level, educational qualifications, experience and location of the candidate.
Role Overview
We are looking for a highly motivated vendor engineer with strong expertise in cellular technologies (4G/5G) to support device validation, debugging, and certification activities. The candidate will work closely with cross-functional teams (FW, SW, modem, and labs) to ensure robust cellular performance and compliance.
Key Responsibilities
Perform end-to-end device validation for cellular technologies including LTE, 5G (SA/NSA) features
Execute and analyze lab and field testing across multiple carriers and network conditions
Conduct protocol-level debugging using logs (QXDM, MBIM traces, modem logs, etc.)
Identify, isolate, and root-cause cellular connectivity issues (attach, call drops, data failures, standby behavior)
Work with internal teams and vendors to triage bugs and drive issues to closure
Support regression validation and sanity verification.
Generate test reports, defect summaries, and RCA documentation
Contribute to improving test coverage, automation, and validation frameworks
Required Skills
Experience
Core Technical Skills
Strong protocol knowledge (3GPP LTE/5G signaling, NAS/RRC basics, IMS/SIP flows)
Device testing experience (smartphones, modems, or embedded systems)
Hands-on experience with cellular test equipment (e.g., call boxes like Anritsu, Keysight, Rohde
Schwarz)
Experience in log analysis and debugging tools (e.g., QXDM, modem logs, trace analysis)
Good understanding of cellular call flows, attach procedures, and data connectivity
Working knowledge of scripting (Python / PowerShell / Bash) for test automation, log parsing, or workflow efficiency
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