Practical engineering tips, design theory and performance breakdowns — written for developers and founders who like their advice tested in production.
Filtering by tag #best-practices — clear
Not all tests are equally useful. What each type of test catches, how much of each to write, and a pragmatic testing strategy for web apps that gives confidence without slowing you down.
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Missing awaits, await inside forEach, accidental waterfalls and swallowed errors. The async/await bugs that pass code review and fail in production, with the fix for each one.
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Write a failing test, make it pass, clean up. TDD sounds slow but often makes you faster. How the red-green-refactor loop works in practice, where it shines, and where it doesn't fit.
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Changing an API after clients depend on it is painful. The design decisions worth getting right early: resource naming, status codes, error format, pagination, versioning and idempotency.
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A file upload form is one of the riskiest features you can build. How to validate real file types, store files safely, upload straight to object storage, and serve user content without opening holes.
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Password reset is one of the most attacked features in any app. How to generate and store reset tokens, avoid leaking which emails exist, expire and invalidate correctly, and protect users after a reset.
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Client-side validation makes forms pleasant; server-side validation keeps your app safe. How to validate properly with schemas, share rules between frontend and backend, and avoid common gaps.
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Every developer inherits code they didn't write, without tests or documentation. How to understand an unfamiliar codebase quickly, add safety nets, refactor in small steps and avoid the big rewrite trap.
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A great README, useful code comments, decision records and API docs that stay current. Practical templates and habits for documentation that saves time instead of going stale.
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