Hardware Development Engineer II, Amazon Leo

About the role

We are looking for a hands-on Test Engineer to join the CommSys team within AMZ Leo RF/Modem Dev, responsible for validating 3GPP- and O-RAN-compliant network elements (RAN HW/SW) across lab and integration environments. The ideal candidate is comfortable working at the intersection of RF hardware, software, and automation — executing test campaigns, debugging complex system issues, and collaborating closely with integration, development, and automation teams to ensure product quality and standards compliance.

Responsibilities

• Standards & Test Expertise – Maintain strong working knowledge of 3GPP standards (LTE/5G NR) and the O-RAN stack (O-DU, O-CU, O-RU, fronthaul/midhaul interfaces, Open Fronthaul specifications). Stay current with conformance test specifications/lists (e.g., 3GPP TS 38.141/36.141 series, O-RAN conformance and interoperability test plans) and translate them into executable test cases. Understand RF, protocol stack layers (PHY/MAC/RLC/PDCP/RRC), and call-flow behavior well enough to interpret test results and identify root causes. Design new test cases to extend coverage