Software Development Engineer, Mobile App Foundations, BuilderWorks

Ever wonder what it takes to keep one of the world's most-used mobile apps fast, reliable, and evolving? We're looking for a Software Development Engineer to join Mobile App Foundations (MAF) -- the team that builds the platform layer powering the Amazon Mobile Shopping app and beyond. Our systems serve hundreds of millions of customers daily, processing billions of events across iOS and Android. You'll tackle problems at the intersection of mobile engineering, distributed systems, and large-scale platform modernization -- where your decisions have org-wide reach and your code ships to hundreds of millions of devices. Key job responsibilities - Build and evolve mobile platform infrastructure used by dozens of engineering teams across Amazon Mobile - Design systems that operate at massive scale -- billions of daily events across iOS and Android - Drive migration of mobile services to modern architectures as part of a multi-year platform transformation - Develop client-side frameworks for runtime configuration, feature management, and progressive rollout mechanisms - Build instrumentation and measurement systems that help teams understand and improve the customer experience - Contribute to production resiliency -- on-call, incident response, emergency configuration systems, and system reliability