Amazon's Last Mile Technology has the operational focus of providing new and different technologies to solve challenges in the last mile delivery space. We want to ensure a top-in-class customer experience from the time a customer places an order on Amazon.com to the time it lands in the customer's hands. It is in our makeup to drive true innovation in this space. Building on that concept, one of the key delivery systems to support Last Mile is OnRoad Transporter X. OnRoad Transporter X aims to delight customers by orchestrating millions of package deliveries through intelligent routing, real-time optimization, and seamless integration across Amazon's delivery ecosystem. This platform powers critical Speed programs including Quick Commerce (QCX), Fusion Rush grocery deliveries, SWIFT ultra-fast deliveries, and Premium SSD that enable same-day and ultra-fast delivery options that customers have come to expect from Amazon. We are looking for talented Software Development Engineers to design and build these mission-critical backend systems and products. You will work on hard problems at scale and will have autonomy to deliver impactful solutions. You will be responsible for developing and maintaining tier-1 services like FIPS (FlexItineraryProviderService) that acts as the API gateway between Rabbit mobile applications and backend services, IM (Itinerary Manager) that manages sequenced stops and tasks for transporters etc. Your work will directly impact innovative projects like Revy (reverse logistics optimization) and the broader Speed program portfolio that enables same-day and ultra-fast deliveries across grocery, SWIFT, FUSION, and Quick Commerce programs. You will learn about real-time adaptive transportation solutions, advanced routing algorithms and optimizations, operating on large scale datasets handling millions of delivery decisions per day, distributed systems architecture for high-throughput services, API design patterns for mobile-to-backend communication, integration with P2P Transport Request Services (PTRS), and complex event-driven architectures that maintain the reliability and performance standards that Amazon customers depend on. You'll be building systems that support offline delivery execution, secure data handling on unmanaged devices, bandwidth optimization for global markets, and real-time visibility for operational dispatchers. It's always Day 1 at Amazon, are you up for the challenge?