Software Development Engineer II, Fulfillment Optimization

Do you want to build the systems that keep millions of packages moving on time across Amazon's transportation network? We are looking for a Software Development Engineer to help us design, build, and operate the production infrastructure behind a system that tells fulfillment centers and trucks exactly how fast packages should flow — every hour, across thousands of routes.

In this role, you will own software that processes dozens of complex inputs, transforms them into reliable signals, and delivers them to systems that make real-time decisions about when packages ship, when trucks depart, and how capacity is allocated across the network. You will write production-quality code in Python, design event-driven architectures on AWS, build automated quality validation frameworks, and solve distributed systems challenges that directly impact operational performance at Amazon scale.

What makes this role compelling is the combination of complexity and impact. You are not building something theoretical — you are building software that downstream systems depend on every single day to move packages for customers worldwide. You will tackle real production problems: ensuring five-nines availability, designing systems that balance rapid model iteration with production stability, integrating with critical transportation systems, and building the monitoring and diagnostics that keep everything running. If you enjoy owning systems end-to-end, writing clean code that operates at scale, and solving hard problems where reliability truly matters, this is the role for you.

Design and own production software that processes complex inputs and delivers reliable outputs to downstream transportation systems Build event-driven architectures and automated quality validation frameworks on AWS Drive operational excellence through monitoring, diagnostics, and chaos testing to achieve five-nines availability Collaborate with science and engineering teams to integrate model outputs with systems across Amazon's fulfillment network