What are common architectural mistakes in Node.js projects?
God modules, sharing databases across services, sync heavy work in request handlers, no API versioning, in-memory session state, tight coupling through direct imports, no schema validation, and console.log in production.
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More FAQs in Common Architectural Mistakes in Node.js Projects
It couples services. If one service changes a schema, others break. Each service should own its data. If you need data from another service, use an API or event, not a direct query.
Offload heavy work to worker threads or background jobs. For long tasks, send a 202 Accepted and let the client poll for the result. Keep request handlers async and light.
If you ship v1 without versioning and later need to change the response shape, every client breaks. Version from the start (/v1/users) and bump the version on breaking changes.
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