Sr. Modem Systems Engineer, Amazon Leo

Amazon Leo is an initiative to launch a constellation of Low Earth Orbit satellites that will provide low-latency, high-speed broadband connectivity to unserved and underserved communities around the world.Come work at Amazon!Key job responsibilitiesThe Role:Be part of the team defining the system level architecture of Leo’s broadband wireless system from customer end points to terrestrial gateways via Low Earth Orbit satellites.This is a unique opportunity to help define a next-generation wireless PHY solution with minimal legacy constraints. The team focuses on physical layer system design, including waveform optimization, modulation and coding strategies, MIMO, synchronization, channel estimation, equalization, and link adaptation under realistic channel conditions. Responsibilities also include PHY performance modeling and simulation, link budget analysis, spectral efficiency optimization, interference mitigation, and development of top-level wireless system architecture aligned with hardware and real-time implementation constraints.In this role you will:- Develop and improve physical layer modem algorithms for wireless communication systems- Work on system architecture, signal processing, and performance optimization for components such as modulation/demodulation, channel coding, channel estimation, equalization, MIMO, and synchronization- Support pre-silicon verification and post-silicon validation/debugging- Collaborate with RF, ASIC, DV, and SW teams to enable efficient hardware and real-time implementationExport Control Requirement:Due to applicable export control laws and regulations, candidates must be a U.S. citizen or national, U.S. permanent resident (i.e., current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.Basic qualifications- Bachelor's degree in electrical engineering or equivalent- 7+ years of experience in wireless systems design and / or RF design implementation- Experience in wireless system design and architecture, system integration, RF system analysis- Experience with current and upcoming RF standards in cellular (4G/5G), WiMAX, 802.11ad, microwave backhaul, DVB-S2 / DVB-C, OR similar broadband wireless standardsPreferred qualification - Master’s / PhD degree in Electrical Engineering or Communications Systems- Good analytical, problem solving and communication skills- Experience with development of a new wireless communications system- Experience with technical-focused regulatory filings and spectrum coordination- Experience with communication theory, OFDM, MIMO, Digital/Wireless Communication Systems and RF engineeringAmazon 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 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 .USA, CA, San Diego - 159,200.00 - 215,300.00 USD annually