Network Development Engineer, 5G NTN Network Integration and Test, Amazon Leo

Amazon Leo is building a Low Earth Orbit satellite constellation to deliver high speed, low latency broadband connectivity to unserved and underserved communities around the world. As part of Payload Integration and Test, this role is focused on hands on integration, validation, troubleshooting, and qualification of end to end satellite communications systems across space, ground, RF, modem, RAN, Core, transport, and cloud infrastructure. The work is lab centered and system focused. The role is not a software development position, but the ability to use Linux, Python, protocol traces, packet captures, and automation to debug complex systems is highly valuable.

Export Control Requirement
Due to applicable export control laws and regulations, candidates must be a U.S. citizen or national, U.S. permanent resident that is a current Green Card holder, or lawfully admitted into the U.S. as a refugee or granted asylum.


Key job responsibilities
This role owns the network integration path between Open RAN, 5G Core, IMS, transport, lab infrastructure, and satellite payload test systems. The candidate should be able to debug across CU, DU, RU, gNodeB, Core, routing, switching, tunnels, packet captures, and lab hardware without needing the problem to be pre isolated by another team.

Key Job Responsibilities
•Integrate and validate end to end network connectivity across Open RAN, gNodeB, 5G Core, IMS, transport, and LEO satellite test systems.
• Validate 3GPP Release 17 NTN behaviors from a network integration perspective, including attach, registration, bearer setup, user plane, mobility, and service continuity.
• Integrate and test Open RAN architecture components including CU, DU, RU, F1, E1, Xn, and gNodeB connectivity into lab and payload environments.
• Validate VoNR and IMS call flows, including registration, SIP signaling, media path, QoS, emergency call behavior where applicable, and failure recovery.
• Troubleshoot NGC, NGU, NGAP, GTP U, SCTP, PFCP, VLANs, routing, MPLS, Segment Routing, QoS, MTU, timing, and user plane performance issues.
• Build and execute integration, regression, interoperability, failover, resiliency, and performance test plans for lab and HIL environments.
• Use packet captures, protocol logs, Linux tools, telemetry, and system traces to drive root cause across RF, RAN, Core, payload, transport, and cloud teams.
• Partner with RF, modem, payload, Core, RAN, software, and systems teams to define pass fail criteria and drive issues from ambiguous system behavior to clear resolver ownership.
• Support readiness reviews, test reports, and operational handoff for production bound satellite terrestrial network capabilities.

BASIC QUALIFICATIONS

- Associate's degree or above
- 5+ years experience integrating, testing, or operating LTE or 5G networks in lab, carrier, vendor, or large scale production environments.
- Strong practical knowledge of 3GPP network architecture, including RAN to Core interfaces and 5G user plane and control plane flows.
- Experience with Open RAN or disaggregated RAN architecture, including CU, DU, RU, gNodeB integration, and related interfaces.
- Knowledge of 3GPP Release 17 NTN concepts and ability to apply standards knowledge during integration and troubleshooting.
- Experience with VoNR and IMS protocols, including SIP, RTP, registration, call setup, media path validation, and failure analysis.
- Strong Linux networking skills and ability to troubleshoot routing, interfaces, packet captures, firewalls, tunnels, timing, and performance.
- Experience with Wireshark or equivalent tools for packet and protocol analysis.
- Experience working in hands on lab environments with physical infrastructure, HIL setups, network equipment, and multi team debug.

PREFERRED QUALIFICATIONS

- Experience with LEO, satellite communications, NTN, or space to ground network integration.
- Experience with 3GPP Release 18 NTN or emerging NTN standards.
- Experience with MOCN, MORAN, Multi PLMN broadcast, PLMN operations, network slicing, or shared RAN deployments.
- Experience with Cisco, Juniper, Arista, MikroTik, or comparable routing and switching platforms.
- Experience with MPLS, Segment Routing, EVPN, VXLAN, BGP, OSPF, IS IS, QoS, and high availability transport design.
- Python scripting experience for test automation, log parsing, packet analysis, or lab tooling.
- Experience with Kubernetes, cloud networking, CI based regression, or automated lab orchestration.
- Experience producing clear test reports, defect summaries, and executive ready readiness assessments.

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