Part of the team to launch the scalable, performant, highly available distributed file system, Colossus, responsible for storing the majority of Google's data. A sneak peak of the system:

https://cloud.google.com/blog/products/storage-data-transfer/a-peek-behind-colossus-googles-file-system

Tech lead of Colossus Namespace Service, the de facto file system at Google, with a wide range of usages.