Tmobile 5G Engineer Jobs (NOW HIRING)

POSITION: System Validation Engineer, Wireless Connectivity

Who We Are:

Quest Global delivers world-class end-to-end engineering solutions by leveraging our deep industry knowledge and digital expertise. By bringing together technologies and industries, alongside the contributions of diverse individuals and their areas of expertise, we are able to solve problems better, faster. This multi-dimensional approach enables us to solve the most critical and large-scale challenges across the aerospace & defense, automotive, energy, hi-tech, healthcare, medical devices, rail and semiconductor industries.

We are looking for humble geniuses, who believe that engineering has the potential to make the impossible possible; innovators, who are not only inspired by technology and innovation, but also perpetually driven to design, develop, and test as a trusted partner for Fortune 500 customers. As a team of remarkably diverse engineers, we recognize that what we are really engineering is a brighter future for us all. If you want to contribute to meaningful work and be part of an organization that truly believes when you win, we all win, and when you fail, we all learn, then we’re eager to hear from you. The achievers and courageous challenge-crushers we seek, have the following characteristics and skills

About the job:

Join the Wireless Connectivity System Validation team supporting AR and wearable products. You’ll validate RF design and product certification across Cellular, Wi-Fi, Bluetooth, GPS, and NFC, and drive automation, data analysis, and reporting. This role requires strong technical skills, effective communication, and the ability to manage complex stakeholder relationships.

What You will Do:

• Develop and execute test plans for RF validation (Cellular, Wi-Fi, Bluetooth, GPS, NFC) and regulatory standards (FCC, IC, CE, JP, KR).
• Operate and maintain advanced RF test stations and lab equipment.
• Build Python scripts for test automation, data analysis, and reporting.
• Generate clear, actionable validation reports for internal and external stakeholders.
• Communicate clearly and proactively with cross-functional partners, including RF architects, systems engineers, electrical design engineers, and factory test teams.
• Present findings and updates in meetings and written reports; document lessons learned and best practices.
• Effectively manage multiple stakeholder DRIs, drive alignment, resolve conflicts, and ensure timely delivery.
• Prioritize tasks, escalate blockers, and deliver results in a fast-paced environment.
• Mentor and coach team members, contributing to team growth and knowledge sharing.
• Demonstrate organizational efficiency by simplifying work, streamlining operations, and maintaining high standards of quality and inclusivity.

What You Will Bring:

• Bachelor or Master of Science degree in Electrical Engineering or Computer Science or equivalent work experience
• 3-5 years of relevant professional experience, specifically in the areas of cellular connectivity and GPS navigation systems in the consumer electronics industry.
• Deep understanding of cellular technologies: GSM, UMTS, LTE, 5G NR (including SA/NSA modes).
• Hands-on experience with carrier aggregation, VoLTE, VoWiFi, and eSIM testing.
• Familiarity with SIM card profiles, APN configuration, and network registration procedures.
• Knowledge of RF performance metrics: RSSI, RSRP, RSRQ, SINR, throughput, handover, and call setup.
• Experience with field testing, drive testing, and lab-based cellular network emulators (e.g., Anritsu, Rohde & Schwarz, Keysight).
• Strong knowledge of GNSS systems: GPS, GLONASS, Galileo, BeiDou.
• Experience with GPS receiver validation, including TTFF (Time To First Fix), accuracy, sensitivity, and multipath mitigation.
• Familiarity with GPS simulation tools and signal generators (e.g., Spirent, Rohde & Schwarz).

Additional preferred skills:

• Experience with device certification for major carriers (AT&T, Verizon, T-Mobile, international operators).
• Familiarity with 3GPP test cases and conformance testing.
• Understanding of SAR, OTA, and regulatory requirements for cellular devices.
• Experience with troubleshooting network interoperability issues in multi-vendor environments.

Pay Range: $100,000 - $130,000 yearly

Compensation decisions are made based on factors including experience, skills, education, and other job-related factors, in accordance with our internal pay structure. We also offer a comprehensive benefits package, including health insurance, paid time off, and retirement plan.

Work Requirements:

This role is considered an on-site position located in Sunnyvale, CA

You must be able to commute to and from the location with your own transportation arrangements to meet the required working hours. 

Travel requirements: Due to the nature of the work, no travel is required.

Benefits:

• 401(k) matching
• Dental insurance
• Health insurance
• Paid time off
• Vision insurance
• Employer paid Life Insurance, Short- & Long-Term Disability