As applications grow from a single service to a constellation of packages, libraries, and services, monorepo architecture becomes essential for maintaining developer productivity and code quality.
Why Monorepo?
Monorepos enable shared type definitions, unified CI/CD pipelines, atomic cross-package changes, and consistent tooling configuration. For TypeScript projects, they eliminate the "published package" overhead of multi-repo setups.
Tooling Stack
Our recommended stack: Turborepo for build orchestration, pnpm workspaces for dependency management, and tsconfig path aliases for cross-package imports. This combination provides fast builds, deduped dependencies, and seamless IDE support.
Project Structure
Organize packages by domain (not by technical layer). A well-structured monorepo might include packages for shared UI components, API clients, domain logic, and individual deployable services.
CI/CD Optimization
Use Turborepo's remote caching to avoid rebuilding unchanged packages. Combined with affected-only testing, this can reduce CI pipeline times by 80% or more in large monorepos.
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