Streamline code development

Amtek Corporation is an e-commerce company that has recently migrated their data and all processes to AWS. They have hired you as a Solutions Architect to help with this new transition. Your first task is to move the company's existing code management infrastructure to the cloud. The engineering team needs automated delivery pipelines, support for JSON templates, and real-time notifications on pipeline events.

Which AWS service would be the most suitable for streamlining their development workflow in this scenario?