Wireless Systems Embedded Firmware Engineer III

The ideal candidate has hands-on experience with cellular testing across both 5G NR and LTE technologies, including radio protocol validation, RF performance, and conformance/functional test execution.

They should be proficient with test automation on CMX (Rohde & Schwarz CMX500/CMW callbox platforms), building and maintaining automated test scripts and regression suites. Strong lab bench skills are expected, including confident use of an oscilloscope and related instrumentation for signal integrity, timing, and hardware debug. Familiarity with scripting (e.g., Python) for test automation, along with a solid grasp of cellular signaling and measurement fundamentals, will round out the profile.

Day-to-Day Responsibilities — Cellular Test Engineer (5G NR / LTE)

Test execution & validation
Execute conformance, functional, and regression test campaigns on 5G NR (SA/NSA) and LTE devices, covering RRC/NAS signaling, mobility, carrier aggregation, and data-throughput scenarios.
Validate radio protocol behavior against 3GPP specs and log findings with clear reproduction steps.
Run RF performance measurements (TX power, sensitivity, EVM, spurious emissions, throughput vs. signal level) and compare results against product requirements.

Automation on CMX/CMW
Build, maintain, and extend automated test scripts and suites on Rohde & Schwarz CMX500/CMW callbox platforms.
Own the nightly/weekly automated regression pipeline: monitor runs, triage failures, and keep the suite green as firmware drops land.
Develop Python tooling for test sequencing, instrument control, result parsing, and reporting; reduce manual test time through incremental automation.

Lab bench & hardware debug
Set up and operate lab benches: callboxes, spectrum/signal analyzers, power supplies, attenuators, shield boxes, and RF cabling.
Use an oscilloscope for signal integrity, timing, and power-sequencing debug on device hardware; isolate whether an issue is RF, protocol, or hardware in origin.
Maintain bench calibration, cable loss characterization, and equipment health; keep test setups documented and reproducible.

Debug & cross-functional work
Analyze protocol logs (QXDM/QCAT, modem traces, callbox logs) to root-cause failures and narrow them to a specific layer or component.
Partner with firmware, RF, and hardware engineers to reproduce issues, verify fixes, and confirm no regressions.
File, track, and drive defects to closure; escalate blockers affecting release milestones.

Reporting & continuous improvement
Produce daily/weekly test status summaries: pass rates, new failures, coverage gaps, and blocking issues.
Contribute to test plan development for new features, chipsets, and bands; expand coverage where automation or scenarios are thin.
Document test procedures, bench configurations, and known issues so results are repeatable across engineers and sites.

Preferred Qualifications
Master's degree in Computer Engineering or Electrical Engineering
Lab - engineer experience
Former Meta experience is best
Engineering degree preferred


Pursuant to the California Fair Chance Act, Los Angeles County Fair Chance Ordinance for Employers, Los Angeles Fair Chance Initiative for Hiring Ordinance, and San Francisco Fair Chance Ordinance, qualified applicants will be considered for assignment with arrest and conviction records. Criminal history may have a direct, adverse, and negative relationship with some of the material job duties of this position. These include the duties and responsibilities listed above, as well as the abilities to adhere to company policies, exercise sound judgment, effectively manage stress and work safely and respectfully with others, exhibit trustworthiness, meet client expectations, standards, and accompanying requirements, and safeguard business operations and company reputation.



This posting is for a contract assignment with Tundra Technical Solutions to provide services to Meta.

The pay range that Tundra in good faith reasonably expects to pay for this position is $90/hour - $100/hour.

Tundra’s benefits offering includes optional medical, dental, vision, retirement benefits, up to 15 Days PTO per annum and a New Child Benefit.

Tundra Technical Solutions is among North America’s leading providers of Staffing and Consulting Services. Our success and our clients’ success are built on a foundation of service excellence. We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic. Qualified applicants with arrest or conviction records will be considered for employment in accordance with applicable law, including the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act. Unincorporated LA County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: client provided property, including hardware (both of which may include data) entrusted to you from theft, loss or damage; return all portable client computer hardware in your possession (including the data contained therein) upon completion of the assignment, and; maintain the confidentiality of client proprietary, confidential, or non-public information. In addition, job duties require access to secure and protected client information technology systems and related data security obligations.

The Meta CWX Program is enabled by a cutting-edge software platform called TalentNet that leads the contingent labor world for technology innovation. The software platform leverages Machine Learning and Artificial Intelligence to make sure the right people end up in the right job.

At Meta, we are constantly iterating, solving problems, and working together to connect people all over the world. That’s why it’s important that our workforce reflects the diversity of the people we serve. Hiring people with different backgrounds and points of view helps us make better decisions, build better products, and create better experiences for everyone.

We give people the power to build community and bring the world closer together. Our products empower more than 3 billion people around the world to share ideas, offer support, and make a difference.

This posting is for a contract assignment with Tundra Technical Solutions to provide services to Meta. Please note that this is not a full-time employment opportunity. Candidates selected for this role will be engaged as contractors for the specified duration of the project. For any inquiries regarding the terms of the contract or engagement, please contact Tundra Technical Solutions directly.

Salary : $90 - $100