Sina Jafari has extensive experience in software engineering and management, with significant roles at Microsoft and Amazon. At Microsoft, Sina served as a Senior Software Engineering Manager, leading the redesign of the CloudTest worker service to support Linux and ARM64, and previously contributed to improving Azure VM allocations as a Senior Software Engineer. As a Principal Software Engineering Manager, responsibilities included managing a team dedicated to maintaining CloudTest service functionalities. Prior to these roles, Sina worked on consolidating test infrastructures and enhancing developer productivity. At Amazon, as a Software Development Manager in the AWS S3 organization, Sina managed a team focusing on scaling S3 fleets and developing distributed services for capacity provisioning. Additionally, an internship at Google involved designing an automated tool for the Google Analytics team.