The Code Services team in Amazon Software Builder Experience (ASBX) owns all source control at Amazon — GitFarm, GitHub, and GitLab. Amazon builds on our platforms — literally. Millions of repositories, hundreds of thousands of production systems, and every AI agent writing code at Amazon today push changes to infrastructure we own and operate. We're looking for a Software Development Engineer to build and scale the platforms where all Amazon code lives, at a time when AI agents are becoming first-class participants in source control alongside human developers. You'll design and deliver systems that operate at massive scale while shipping features that shape how the next generation of builders — both human and AI — interact with code.

Key job responsibilities

• Design, build, and operate source control infrastructure serving millions of repositories and billions of monthly code operations across Amazon.
• Deliver scalable, highly available services that support GitFarm, GitHub Enterprise, and GitLab — platforms that have >4 nines of availability.
• Build APIs and platform capabilities that enable AI agents and automated systems to interact with source control safely and at scale.
• Drive operational excellence — own on-call, reduce operational toil through automation, and contribute to our AI-native operations approach.
• Collaborate with engineers across ASBX to deliver a unified, secure developer experience across all source control platforms.
• Solve hard distributed systems problems — monorepo scaling, high-throughput git operations, cross-platform consistency, and performance at Amazon scale.
• Contribute to technical design, code reviews, and mentoring of junior engineers.

A day in the life
As an SDE II on Code Services, you design and build systems that every Amazon developer depends on. You might spend the morning optimizing git operations for monorepo performance, then shift to building APIs that AI agents use to interact with source control. You collaborate with teammates across GitFarm, GitHub, and GitLab to deliver features and resolve operational issues. Your customers are literally all of Amazon — from principal engineers to AI coding assistants. You balance shipping new capabilities with operating infrastructure that is always available.

About the team
The Code Services team owns all source control at Amazon — GitFarm, GitHub, and GitLab. Millions of repositories, billions of monthly code operations, and hundreds of thousands of production systems depend on our platforms. We manage Amazon's external open-source presence on GitHub and operate one of the largest GitLab installations in the world. We are an AI-native team — our operations agent resolves the majority of customer issues autonomously and self-improves over time. We ship fast, operate with high standards, and build for the agentic developer era.