5G/LTE Expert

Sagemcom is a ground-breaking technology integrator in telecoms and energy. Sagemcom's teams all over the world continuously strive to innovate on their various markets and are committed to delivering made-to-measure and responsible solutions every day that meet the needs of telecoms operators and utilities. Today, our Group is: * The worldwide N°1 provider of broadband solutions (Internet boxes and the associated software services)* The leading provider of audio-video solutions (4K video hubs and the Video SoundBox™ )* The leading European provider of smart grid solutions (smart meters, smart grids, rural electrification, IoT)Sagemcom posted €2,3 billion of revenues in 2024.

The headcount of 6,500 employees works in more than 50 countries. Sagemcom strives every day to honour its commitment to societal and environmental responsibility, as part of its continual improvement policy. This is the reason why Sagemcom became a "mission-driven company" at the start of January 2022. Do you want to join us?Sagemcom is looking for job applicants in R&D, business, purchasing and support.

People who are agile and like to be independent in agile organizations, who enjoy travelling and have their fair share of creativity, will achieve self-fulfilment in this industrial group that manufactures high-technology products!We are seeking a highly skilled 5G/LTE Expert to join our innovative team. This role focuses on the design, development, and optimization of next-generation high-performance fixed wireless gateways. You will work closely with hardware, firmware, and software teams to deliver reliable, standards-compliant, and high-throughput 5G/LTE solutions. Responsibilities:

Contribute to the 5G technology and product roadmap Guide customers during the product definition phaseParticipate to hardware design choices (key components, cost driven conception). Guide engineering Software developments during the design phasePropose SW architecture and evolutions in Sagemcom supported middlewares while identifying opportunities of contributions to open source communities such as PRPL or RDK-B Build test plans to confirm functions and performance of the productsReproduce, Investigate and resolve issues with the engineering teams, SoC vendor support and the customersConduct trainings to Sagemcom engineering groups involved in 5G/LTE projects.

Maintain a corporate knowledge databaseFollow chip-makers and module vendors roadmapsEvaluate new chipsets, software and RF solutions, module vendor samplesBenchmark certification labs capabilities, lead certification efforts for our CPE remotely or locally in the US labsRequirements: Minimum 10 years of experience in the industry. Strong understanding of 3GPP standards including LTE, 5G NR (NSA & SA)Protocol stack expertise for layer 1~3 protocols, including PHY, MAC, RLC, PDCP, RRC, … Understanding of carrier aggregation, dual connectivity (EN-DC) and other advanced 5G/LTE features. Familiarity with RF principles and physical layer parameters, such as SNR, RSSI, RSRP, RSRQ, SINR.

Strong knowledge of IP networking protocols (IPv4/IPv6, NAT, XLAT, DNS, DHCP). Proficiency in modem log analysis tools, such as QXDM, QCAT, Wireshark. Ability to analyze over-the-air (OTA) signaling and low-level logs for failure root cause (attach failures, handovers, call drops,…) and performance bottlenecks. Use of log decoders and post-processing scripts (e. g. , Python) for test automation and data analysis. Familiarity with network emulators and test equipment, such as R&S, Anritsu, Keysight, Spirent. Understanding of carrier conformance and GCF/PTCRB certification processes. Experience with interoperability testing (IOT) with major network operators.

Effective communication with cross-functional teams, including RF, software, test. Capacity to document technical findings and build trainingsBenefits: 401(k)Health InsuranceDental insuranceVision insurancePaid time off