Software Development Engineer II, S3 Shard Store

Amazon S3 Software Development Engineer

As an SDE in Amazon's Simple Storage Service (S3), you will solve exciting problems at incomparable scale. You will help build systems that manage trillions of objects in storage, retrieve them in milliseconds, across tens of thousands of hosts, all while maintaining 99.999999999% (you didn't read that wrong, that's 11 nines!) of data durability. Amazon S3 powers businesses, nonprofits, and transformative organizations across the globe that make the lives of people better daily. As an SDE in S3, you will work with teams of talented engineers and leaders to hand deliver changes to our system that delight our customers, and in turn improve the lives of their customers.

Key job responsibilities as an SDE in S3 Storage team include building the services that persist and retrieve customer data. The services you will own are the foundation of S3, and managing them at the scale of S3 provides challenging technical problems that you will solve. That scale provides leverage for your work to improve the experience of many customers, and you will tackle some of the most difficult problems in S3 head-on. You will be responsible for the design and implementation of new components and improvements to services within our space, and will work with other engineers on your team to deliver.

A typical day for an SDE in S3 Storage is based around writing code and solving problems at scale. On any given day, you may spend time delivering features and fixing bugs, add testing to existing code, improve operational tooling, collaborate with senior engineers to design new components that shape the future of the system, and build expertise in specific areas of the service and grow to be a subject matter expert in your domain. Occasionally, you will be involved in operational investigations to resolve and root cause customer impacting issues, as well as write documents outlining your solution to complex problems. In addition you will leverage gen AI to automate many of the root causing reducing manual operator involvement.

The S3 Storage team works on building and supporting high performance storage service to S3 customers. The team works in an agile fashion to deliver and scale our service as we grow to new availability zones in 2026. Key technical challenges in the team are around Security, Durability, Availability, Performance, and Cost.