Serverless API Stack (TypeScript, SST, DynamoDB, Lambda, CloudFront) overview

A serverless-first API architecture using SST (Serverless Stack) for infrastructure-as-code with a developer-friendly local development experience. TypeScript provides type-safe Lambda handlers with Zod for request validation. The API is fronted by CloudFront for edge caching and global distribution. DynamoDB delivers single-digit millisecond reads at any scale with a pay-per-request pricing model. SST's Live Lambda Dev enables instant feedback during development without waiting for CloudFormation deployments. This stack minimizes operational overhead — no servers to patch, no capacity planning, and costs scale to zero during idle periods. The tradeoff is vendor lock-in to AWS primitives and the cold-start latency penalty on infrequently-invoked functions, which can be mitigated with provisioned concurrency at additional cost.