The Software Dev Engineer III position at Amazon.com Services LLC involves driving the architecture and design of large-scale, multi-tiered, distributed software applications, tools, systems, and services. The role requires gathering business and functional requirements from customers and translating them into technical specifications to build robust, scalable, and supportable solutions. The engineer will serve as a technical lead throughout the full development lifecycle, from scoping and planning to design, implementation, testing, documentation, delivery, and maintenance. Responsibilities also include providing design reviews for other engineers and managing resources on multiple technical projects to ensure alignment with technology and business goals.