Reusing CloudFront, ALB, and API Gateway in a Serverless Platform

Modern serverless platforms often need to support a mix of public-facing entry points - web applications and APIs - while keeping internal communication private and tightly controlled. Non-functional requirements around security, compliance, and operational isolation typically drive this. At the same time, such platforms are increasingly built around multiple domain services, each representing a bounded context and owned by a small team. Independent deployments, limited blast radius, and clear ownership are usually explicit architectural goals. These goals, however, often collide with another equally important requirement: speed. In fast-paced development environments, the ability to spin up feature environments on demand, test changes quickly, and tear everything down without friction is critical to maintaining delivery velocity. This post explores how architectural choices at the edge - specifically around CloudFront, Application Load Balancers (ALB), and API Gateway - can either ena