Node.js & TypeScript Backend Learning Path

Build type-safe backend APIs with Bun, Elysia, and TypeScript.

Learning Objectives

• Understand how code works and why JavaScript/TypeScript
• Write programs using core JS/TS language features
• Build HTTP APIs with Elysia (Bun-native) or Hono (multi-runtime)
• Use databases with type-safe ORM (Drizzle)
• Validate input, test code, and deploy

Path

Stage	Topic	Level
00-foundations	What programming is, paradigms, JS history	Entry
01-first-code	Variables, control flow, functions, data structures	Entry
02-core-language	Async, modules, TypeScript, event loop	Mid
03-backend-fundamentals	HTTP, REST, API with Elysia, database, validation	Mid
04-production	Testing, logging, config, deployment	Senior
05-workshop	Build a complete type-safe API	Senior

Stack

• Runtime: Bun (not Node.js)
• Framework: Elysia (Bun-native) or Hono (multi-runtime)
• Language: TypeScript
• ORM: Drizzle
• Validation: Elysia's t (powered by TypeBox)

How to Use

Each file is self-contained. Read in order. Every file has code examples you can run with bun run <file>.