Sr. DSP Modem Embedded 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. As a Sr. DSP Modem Embedded Software Design Engineer, you will own critical components of the physical layer software that drives our custom satellite modem ASIC. You'll work across the full development lifecycle — from architecture and requirements through implementation, silicon bring-up, integration, and on-orbit operations. You will operate at the boundary between hardware and software, writing performance-critical code that directly interfaces with custom DSP accelerators and manages real-time link-layer behavior for a broadband LEO constellation. Key Responsibilities: - Develop embedded software in assembly, C, and C++ in a real-time operating system environment for broadband satellite modem systems. - Write real-time critical software to augment and interact with hardware blocks such as FFT, correlator, codec, DPD, etc. - Write device drivers and system applications for satellite broadband link management. - Work closely with modem and hardware teams to lead emulation, board bring-up, integration, and testing 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. About the team Amazon Leo is building a constellation of Low Earth Orbit (LEO) satellites to deliver low-latency, high-speed broadband connectivity to unserved and underserved communities worldwide. Our PHY Software team owns the Layer 1 stack that powers every link in the satellite network — from customer terminals to gateways, across multiple chip generations and orbital configurations. This is a rare opportunity to work at the intersection of DSP algorithm design, real-time embedded systems, and space-grade hardware — shipping software that runs in orbit.