Sr. Communication Systems Research Scientist – Radio Resource Management

Amazon Leo is an initiative to launch a constellation of Low Earth Orbit satellites providing low-latency, high-speed broadband connectivity to unserved and underserved communities around the world. As Basic qualifications: - Master's degree in Electrical Engineering, or experience working in electrical engineering field - 7+ years professional experience working in wireless communications at the system or implementation level - Demonstrated experience in radio resource management for 3GPP systems (LTE, 5G NR or NTN): MAC scheduling, link adaptation, power control, HARQ, mobility or QoS - Experience developing and running link-level or system-level wireless simulators in Matlab, Python or C++, using agentic AI as a tool for development, test and debugging Preferred: - PhD with emphasis in wireless communication systems, radio resource management, or network optimization. Strong foundations in algorithm development, optimization techniques, queueing theory, communications theory and machine learning. - Deep understanding of 3GPP radio resource management: MAC scheduler design, AMC and outer loop link adaptation, open and closed loop power control, HARQ and RLC ARQ interaction, DRX, bandwidth part management, measurement and mobility procedures, and multiple access systems such as OFDMA, SC-FDMA and TDMA. - Expertise in multi-antenna and beam-domain resource allocation: beam assignment and spatial scheduling, beam coloring and reuse planning, beam measurement, switching and handover, MU-MIMO user pairing, and optimization or machine learning applied to joint allocation. - Experience in the development and standardization of 3GPP technologies such as LTE, 5G NR, NB-IoT and NTN, including the Rel-17 through Rel-19 NTN and D2D work items, contributions in RAN1 through RAN4, and a track record of publications or patents. - Experience with direct-to-device or mobile satellite service systems, including the link budget and capacity consequences of a low-gain handset antenna in L/S band MSS or shared MNO spectrum. - Deep understanding of modem L1/L2 algorithms, QoS in packet based wireless systems, and end-to-end architecture from the physical layer to the application end-point, including RRC, NAS, 5GC/EPC and transport over high-latency links. - Depth in simulator design: traffic modeling, PHY abstraction, large-scale Monte Carlo evaluation, calibration against field or testbed measurements, and agentic AI used to scale sweeps, maintain regression coverage and triage failures; familiarity with optimization, queueing theory or machine learning applied to resource allocation. - Ideal candidate has depth in radio resource management and the MAC/RRC layers, a passion for building carrier-grade communication systems, a habit of using agentic AI without giving up rigor, and the ability to work in a small team and lead technical initiatives. Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status. Los Angeles County applicants: Job duties for this position include: work safely and cooperatively with other employees, supervisors, and staff; adhere to standards of excellence despite stressful conditions; communicate effectively and respectfully with employees, supervisors, and staff to ensure exceptional customer service; and follow all federal, state, and local laws and Company policies. 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 and professionalism, and safeguard business operations and the Company’s reputation. Pursuant to the Los Angeles County Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records. Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner. The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience, qualifications, and location. Amazon also offers comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage), 401(k) matching, paid time off, and parental leave. Learn more about our benefits at https://amazon.jobs/en/benefits . USA, CA, Sunnyvale - 183,000.00 - 247,600.00 USD annually USA, TX, Austin - 159,200.00 - 215,300.00 USD annually USA, WA, Redmond - 159,200.00 - 215,300.00 USD annually