Are you passionate about solving complex fulfillment challenges at global scale? Join Seller Flex and help transform how third-party sellers fulfill Amazon orders worldwide. You'll architect systems that power warehouses across multiple countries, solving problems that directly impact millions of sellers and customers. From designing software-driven warehouse activation to building mobile-first operator experiences for Heavy & Bulky fulfillment, your work will drive measurable innovation in one of Amazon's fastest-growing programs.
This role offers a unique opportunity to become a domain expert in 3P fulfillment while rearchitecting core systems for global expansion and scale. You'll work at the intersection of marketplace platforms, warehouse operations, and inventory systems — simplifying architecture, solving high-impact seller problems, and establishing the technical foundation for launching new countries like Japan.
Key job responsibilities
- Design and implement scalable software solutions across the full development lifecycle, including architecture, code, testing, deployment, and maintenance, with focus on warehouse platform systems that enable fast, repeatable global expansion
- Actively participate in code review processes, providing meaningful technical feedback to peers and ensuring operational excellence through root cause analysis and permanent fixes for production issues
- Collaborate with cross-functional teams across the Amazon Fulfillment Network to architect solutions for inventory correctness, node lifecycle automation, and marketplace-aware eligibility systems
- Drive continuous improvement in availability, latency, scalability, and maintainability of fulfillment systems while balancing new feature development with operational priorities
- Identify and resolve architectural bottlenecks in catalog, SKU, and eligibility platforms, designing clean contracts between upstream marketplace systems and downstream order fulfillment
A day in the life
You'll start by investigating needle-moving seller issues, perhaps an inventory mismatch between Seller Flex and a seller's warehouse records, or an edge case blocking warehouse activation in a new country. Mid-morning, you're reviewing a peer's design for making node configuration fully software-driven, offering feedback on idempotency and observability. After lunch, you're pairing with a teammate to refactor a mobile workflow that moves Heavy & Bulky operators off desktop terminals and onto the warehouse floor. You'll wrap up collaborating with teams across geographies on eligibility platform consolidation, ensuring the Japan launch stays on track.
About the team
Seller Flex operates across multiple Amazon marketplaces, with new countries onboarding each year. The engineering organization is structured into teams that each own a different layer of the program. You'll join the team responsible for the warehouse-as-a-platform: what each warehouse contains, how it is configured, how new warehouses come online, and the mobile and web surfaces that warehouse associates use every day.
The team's multi-year focus is making spinning up a new warehouse in any country, of any size, for any category a fast, repeatable, software-driven process. You'll move operators' day-to-day work onto mobile-first surfaces designed for warehouse floor realities. With the Japan launch on the horizon and five core technical bets spanning node lifecycle, inventory correctness, operator experience, catalog platform, and marketplace plurality, you'll shape how Seller Flex scales globally while solving meaningful problems for sellers and their customers.
- 3+ years of non-internship professional software development experience
- 2+ years of non-internship design or architecture (design patterns, reliability and scaling) of new and existing systems experience
- Experience programming with at least one software programming language
- 3+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations experience
- Bachelor's degree in computer science or equivalent
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.