3GPP NTN Systems Integration and Test Engineer, 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 3GPP interpretation and protocol validation for PIT. The candidate should be able to translate 3GPP requirements into lab tests identify gaps in implementation or test coverage and determine whether failures are standards implementation configuration interoperability or environment related.

Key Job Responsibilities
Lead 3GPP protocol validation for Release 17 NTN features across RAN Core IMS mobility bearer management and service continuity.
Define test strategies and pass fail criteria for RRC NAS NGAP XnAP F1AP E1AP PDCP RLC MAC GTP U IMS SIP RTP and VoNR procedures.
Interpret 3GPP specifications and convert standards requirements into executable integration regression conformance and interoperability test cases.
Validate Open RAN behavior across CU DU RU gNodeB 5G Core and IMS systems in lab HIL OTA and end to end environments.
Drive deep debug of protocol failures including registration attach PDU session setup handover cell reselection bearer setup QoS IMS registration and VoNR call setup.
Analyze protocol logs packet captures vendor traces modem traces RAN traces Core traces and RF correlated failures to identify root cause.
Partner with architecture standards RAN Core RF modem software payload and operations teams to close standards compliance and interoperability gaps.
Track industry evolution across Release 17 Release 18 NTN Open RAN IMS VoNR MOCN MORAN and Multi PLMN deployments.
Produce clear test coverage maps defect narratives readiness summaries and risk assessments for leadership and technical stakeholders.


- Associates degree or above
- 5 years experience on LTE or 5G protocol validation systems integration conformance interoperability or protocol stack troubleshooting experience.
- Deep knowledge of 3GPP Release 17 with specific understanding of NTN behavior and satellite related protocol impacts.
- Strong understanding of RRC NAS NGAP F1AP E1AP XnAP PDCP RLC MAC GTP U SCTP QoS mobility and bearer management.
- Experience with Open RAN architecture including CU DU RU gNodeB behavior and disaggregated RAN integration.
- Experience with VoNR and IMS protocols including registration SIP signaling RTP media call setup call release and failure handling.
- Experience analyzing protocol logs and packet captures to determine root cause across RAN Core IMS UE modem and network elements.
- Experience designing test plans regression coverage conformance validation and interoperability validation in a lab environment.
- Linux proficiency and ability to work directly with test equipment logs scripts and lab systems

- Experience with LEO satellite communications NTN test systems or satellite terrestrial network integration.
- Experience with 3GPP Release 18 NTN emerging NTN work items or standards body participation.
- Experience with MOCN MORAN Multi PLMN broadcast PLMN selection shared RAN and carrier interoperability.
- Experience validating emergency services roaming slicing IMS services QoS policy control or carrier acceptance requirements.
- Experience with Keysight Anritsu Rohde and Schwarz Amarisoft Spirent Viavi or comparable protocol and conformance tools.
- Python scripting experience for protocol log parsing automated test verdicts or coverage analysis.
- Ability to mentor engineers who are strong in RF networking or lab execution but less experienced in 3GPP protocol detail.
- Experience building trace based defect narratives that clearly separate symptoms evidence standards references and suspected owner.

Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status disability or other legally protected status.

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 youre applying in isnt 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 WA Redmond - 136000.00 - 184000.00 USD annually