Introduction

TypeScript is no longer “just for front-end.” Node backends, edge functions, and AI SDKs are embracing TS-first workflows. We explore why and how to go all-in across the stack.

Backend and Edge

Node and runtimes Native ESM, type-safe env handling, and faster startup make TS a solid choice for APIs and workers. We compare ts-node, tsx, and compiled output for production.

Edge and serverless Vercel, Cloudflare, and others run TS at the edge. We discuss bundle size, cold starts, and when edge TS pays off vs. a traditional server.

AI and Tooling

AI SDKs in TypeScript Many LLM and agent libraries are TS-first, with strong types for prompts, tools, and responses. We show how that improves DX and catches errors before runtime.

Monorepos and shared types One codebase for API, front-end, and AI logic means shared DTOs and validation. We outline a minimal structure that keeps types in sync without over-engineering.