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# Cellular Systems Engineering Lead, Direct-to-Device, Amazon Leo

- **Company:** Amazon.com, Inc.
- **Location:** Austin, TX, United States
- **Experience:** Expert
- **Salary:** $151,200.0 - $204,600.0
- **Contract:** Permanent contract
- **Skills:** 4G (Telecommunication), Systems Engineering, Interoperability, E2e Testing, Service Development Studio, Software Requirements Analysis, Systems Architecture
- **Published:** October 17, 2026
- **Apply:** https://www.jobmonkeyjobs.com/career/28115482/Cellular-Systems-Engineering-Lead-Direct-To-Device-Amazon-Leo-Texas-Austin-7375

## About the Role

The successful candidate will combine broad cellular and service knowledge with strong customer and partner skills, strong ownership, and the ability to lead in a fast-moving, international environment.

Export 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., Bachelor's degree in a related field

 - 8+ years of professional experience in cellular systems, including at least 3 years in the Direct-to-Device (D2D) ecosystem, NTN, or direct satellite-to-cellular connectivity.
 - Deep experience with 4G or 5G RAN systems, protocols, and procedures (L1 to L3).
 - Solid working knowledge of the 5G core architecture and interfaces, including interworking with terrestrial networks
 - Experience with commercial devices or chipsets, including device logs and analytics tools, in support of cellular or D2D services.
 - Working knowledge of 3GPP NTN standards
 - Experience resolving end-to-end issues with RAN, core, and device vendors., Experience with satellite-based RAN architectures for NTN.
 - Experience with voice over NR (VoNR/IMS), messaging, and emergency services.
 - Experience with device interoperability testing and certification programs.
 - Strong communication skills with demonstrated ability to work effectively across engineering teams, vendors, partners, and leadership organizations.

## Description

* Own the cellular system view of the D2D service across RAN, 5G core, and devices, including requirements, interfaces, and end-to-end behavior.
 * Define and review RAN system requirements for NTN operation, including scheduling, HARQ, timing advance, mobility, and access control.
 * Define and review 5G core requirements and interfaces (including interworking with terrestrial networks, QoS and policy, and charging), and their interaction with the RAN.
 * Own device-side system requirements and behavior, including 3GPP NTN feature support, UE requirements, mobility between terrestrial and satellite networks, and device-side connection management.
 * Work directly with RAN, core, chipset, and device vendors to resolve end-to-end issues, from protocol analysis to root cause and fix.
 * Support end-to-end integration and interoperability activities across RAN, core, and devices, in the lab, in RF chambers, and over the air.
 * Analyze end-to-end call flows and performance (attach, registration, sessions, handover, voice, messaging, data) and translate findings into requirements and design recommendations.
 * Track 3GPP NTN standards evolution and assess its impact on the RAN, core, and device roadmap.
 * Act as the subject matter expert for RAN, core, and device systems, and work closely with System Architecture, Systems Engineering, Integration and Test, and Telco Service Development.
 * Work effectively across geographically distributed, international and multicultural engineering and partner organizations.