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LTE Validation Engineer

Syntronic R&D USA

Sunnyvale, CA • $90,000 to $110,000 / yr • 8/26/2026

Engineering , Professional , Skilled & Trades , Manufacturing

Job Description

Job Description

Are you ready to be part of a leading global engineering design house specializing in the design and development of state-of-the-art embedded hardware, electronics, and electro-mechanics?

What we’re looking for:

• Highly motivated professionals

• Motivated test technician

• Professionals with ability to work both with in-house projects and on-site assignments at our customers’ locations

We are seeking aLTE / 5G RedCap Validation Engineerto lead cellular protocol and RF validation . You will be responsible for end-to-end testing of cellular modems integrated into consumer IoT products, ensuring flawless performance across LTE Cat-M, Cat-1bis, and emerging5G NR RedCap (Reduced Capability)technologies. Your work will directly impact device certification, carrier acceptance, and real-world user experience.

Key Responsibilities

Protocol & RF Validation

  • Design, develop, and executevalidation test plansfor LTE (Cat-1/Cat-4/Cat-M1/NB-IoT) and5G NR RedCapmodems integrated into Lab126 devices
  • Performconformance, functional, and performance testingincluding attach procedures, mobility, handovers, PDU session establishment, DRX/eDRX/PSM power-saving modes, and RRC state transitions
  • ValidateRF parametric performance: TX power, ACLR, EVM, spectrum emissions, RX sensitivity, and blocking across LTE/5G NR bands (FR1)
  • Executecarrier acceptance testing(Verizon OTA, AT&T PTCRB, T-Mobile, Vodafone, DT, KDDI) and supportGCF/PTCRB certificationcampaigns

Test Equipment & Lab Operations

  • Hands-on execution usingRohde & Schwarz CMW500, CMX500, andAnritsu MT8000A / MD8475Bcallboxes for signaling and non-signaling test modes
  • Configure end-to-end call scenarios:VoLTE, VoNR, SMS over IMS, ePDG/Wi-Fi calling, data throughput (DL/UL), CA (Carrier Aggregation), MIMO
  • Set up and operate supporting instrumentation: spectrum analyzers, vector signal generators, network emulators, RF shielded chambers, fading simulators (e.g., Spirent, Keysight PROPSIM)
  • Automate test execution usingPython, TTCN-3, or vendor SDKs (R&S CMWrun, Anritsu Rapid Test Designer)

Debug & Root Cause Analysis

  • Analyzemodem logs(QXDM/QCAT for Qualcomm, ELT for MediaTek),Wireshark captures, andlayer-3 signaling tracesto isolate protocol failures
  • Collaborate with modem vendors (Qualcomm, MediaTek, Sequans, Sony Altair) and chipset teams to drive firmware fixes
  • Reproduce field issues in the lab and provide detailed defect reports with RF/protocol evidence

Cross-functional Collaboration

  • Partner withfirmware, hardware, antenna, and systems engineeringteams during EVT/DVT/PVT phases
  • Supportfield trialswith carrier partners and international deployments
  • Contribute to test coverage strategy for new features:5G RedCap Rel-17/18, Network Slicing, NTN (Non-Terrestrial Networks)
\nCompany Description

Syntronic provides our customers a complete portfolio of professional services to support their product development including research & development, new product introduction, manufacturing and aftermarket services. We adopt the latest technologies in electronics design and software development with a pool of technically skilled staff around the world. Among our customers and partners are some of the world’s most technically-intensive businesses and organizations. This pushes us forward in designing to satisfy our customers’ needs with a focus on quality, competence, capacity and continuity.

Syntronic has today over 2000 employees in 8 countries.

Syntronic values diversity in the workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or protected veteran status. If you require accommodation due to a disability at any time during the recruitment and/or assessment process, please contact our recruiting team and we will make all reasonable efforts to accommodate your request.

Company Description

Syntronic provides our customers a complete portfolio of professional services to support their product development including research & development, new product introduction, manufacturing and aftermarket services. We adopt the latest technologies in electronics design and software development with a pool of technically skilled staff around the world. Among our customers and partners are some of the world’s most technically-intensive businesses and organizations. This pushes us forward in designing to satisfy our customers’ needs with a focus on quality, competence, capacity and continuity. \r\n\r\nSyntronic has today over 2000 employees in 8 countries.\r\n\r\nSyntronic values diversity in the workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or protected veteran status. If you require accommodation due to a disability at any time during the recruitment and/or assessment process, please contact our recruiting team and we will make all reasonable efforts to accommodate your request.