Hello World: We’re Railway` is about Railway Launch Week 01, where the theme is Scale. Railway is an infrastructure company that provides instant application deployments to developers. They are expanding across three new regions: US-East, EU-West, and Southeast Asia, with plans for more in the future. The Regions feature allows users to easily switch between these regions without downtime, thanks to a private networking system and edge networks. This enables seamless traffic routing and load balancing. Railway's architecture is built on top of Temporal, which manages builds, deployments, routing, and cleanup. With Regions, users can now easily switch between regions with zero downtime. The company plans to expand its capabilities further, including hosting on different clouds, baremetal hardware, or user-provided infrastructure.