Software Development Engineer II, Fulfillment Optimization

Description 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

Basic Qualifications

• Experience (non-internship) in professional software development
• Experience designing or architecting (design patterns, reliability and scaling) of new and existing systems
• Experience programming with at least one software programming language

Preferred Qualifications

• Bachelor's degree in computer science or equivalent
• Experience with full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations

Amazon is an equal opportunities employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We value your passion to discover, invent, simplify and build. Protecting your privacy and the security of your data is a longstanding top priority for Amazon. Please consult our Privacy Notice (https://www.amazon.jobs/en/privacy_page) to know more about how we collect, use and transfer the personal data of our candidates.

Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner.

Company

• Amazon EU SARL (Spain Branch)

Job ID: A10471056