LTE Validation Engineer

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 a LTE / 5G RedCap Validation Engineer to 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 emerging 5G 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 execute validation test plans for LTE (Cat-1/Cat-4/Cat-M1/NB-IoT) and 5G NR RedCap modems integrated into Lab126 devices

Perform conformance, functional, and performance testing including attach procedures, mobility, handovers, PDU session establishment, DRX/eDRX/PSM power-saving modes, and RRC state transitions

Validate RF parametric performance: TX power, ACLR, EVM, spectrum emissions, RX sensitivity, and blocking across LTE/5G NR bands (FR1)

Execute carrier acceptance testing (Verizon OTA, AT&T PTCRB, T-Mobile, Vodafone, DT, KDDI) and support GCF/PTCRB certification campaigns

Test Equipment & Lab Operations

Hands-on execution using Rohde & Schwarz CMW500, CMX500, and Anritsu MT8000A / MD8475B callboxes 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 using Python, TTCN-3, or vendor SDKs (R&S CMWrun, Anritsu Rapid Test Designer)

Debug & Root Cause Analysis

Analyze modem logs (QXDM/QCAT for Qualcomm, ELT for MediaTek), Wireshark captures, and layer-3 signaling traces to 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 with firmware, hardware, antenna, and systems engineering teams during EVT/DVT/PVT phases

Support field trials with 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.

Full-time