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#software engineering

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Grid of old brown legacy modules gradually replaced by new blue modules beside the title Refactor legacy code without breaking production

10/17/2026

How to Refactor Legacy Code Without Breaking Production

Big rewrites usually fail, but legacy code doesn't have to stay scary. Learn a step-by-step way to refactor it safely with characterization tests, seams, the strangler fig pattern and feature flags.

software development

By Muhammad Wilayat Shah

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Messy function with cryptic names and a passing tests badge next to the words It works, it's still bad code

10/17/2026

Why Your Code Works but Is Still Bad Code

Passing tests only prove your code works today. Learn the nine signs that working code is still bad code, and the simple habits that make it readable, safe and easy to change.

software development

By Muhammad Wilayat Shah

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