Senior Software Engineer , VirtSat Team

Amazon Leo is an initiative to increase global broadband access through a constellation of 3,236 satellites in low Earth orbit (LEO). Its mission is to bring fast, affordable broadband to unserved and underserved communities around the world.We are seeking a Senior Software Engineer to design, implement, and operate the VirtSat platform — Leo's virtual satellite environment that enables teams to develop, test, and validate satellite software at scale without requiring physical hardware. VirtSat provides high-fidelity emulation of satellite subsystems on cloud infrastructure, serving 70+ downstream pipelines and enabling continuous integration of embedded flight <software.In> this role, you will work across the full VirtSat stack — building cloud services that orchestrate virtual satellite lifecycle, developing QEMU-based hardware emulation plugins, implementing provisioning workflows on AWS, and creating tooling that bridges virtualized environments with real hardware-in-the-loop testing. You will leverage best-in-industry software engineering practices to deliver a platform that is reliable, scalable, and enables satellite software teams to move faster with <confidence.You> must be responsive, flexible, and able to succeed within an open, collaborative peer environment working across embedded software, cloud services, and test automation teams.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.Key job responsibilitiesKey Job Responsibilities- Design and implement cloud services that provision, manage and deploy satellite entities using AWS technologies (EC2 metal instances, Step Functions, DynamoDB, Lambda)- Develop and maintain provisioning workflows (CreateEntity, PowerOnEntity, ProvisionEntity) that orchestrate the full entity lifecycle — from instance launch through embedded software deployment to test-readiness- Build and extend QEMU-based hardware emulation plugins that provide high-fidelity satellite subsystem behavior (transporter, HSM, networking, sensors)- Design automated monitoring, alarming, and self-healing mechanisms to maintain platform availability above 99.5%- Develop tooling that enables test execution across multiple environments: virtualized satellites, hardware-in-the-loop flatsats, and on-orbit vehicles- Implement pre-validation, fail-fast patterns, and retry mechanisms that improve provisioning reliability and reduce wasted workflow time- Drive root cause analysis on platform failures, implement fixes, and build regression prevention into the system- Mentor junior engineers, lead design reviews, and evangelize engineering excellence practices across the team