Amazon is seeking a Senior Software Development Engineer to join their Core Services team under Worldwide Customer Purchase Journey, specifically in the Shipping and Region Authority (SARA) organization. This role focuses on innovating foundational products that shape the customer shopping journey, from gateway pages through search and discovery experiences. SARA's work influences checkout and fulfillment experiences through complex orchestration of shipping, regions, locations, and restrictions domains. The position requires expertise in distributed systems architecture, with responsibilities including designing scalable solutions, leading technical initiatives, and collaborating with cross-functional teams. The ideal candidate will have strong experience in software development, system design, and team leadership. This role offers significant impact potential in shaping Amazon's global customer experience while working with cutting-edge technology at massive scale. The position combines technical leadership with hands-on development, requiring both architectural vision and practical implementation skills.