20 lines
883 B
Markdown
20 lines
883 B
Markdown
---
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author: ["Saurav Dhakal"]
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title: "Understanding Separation of Concerns (SoC) in NestJS"
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date: "2025-08-19"
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summary: "A guide to understanding Separation of Concerns in NestJS using modules, services, and controllers."
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tags: ["nestjs", "typescript", "architecture"]
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categories: ["Backend Development", "NestJS"]
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series: ["NestJS"]
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ShowToc: true
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TocOpen: false
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---
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When building applications, one of the most important design principles to keep in mind is **Separation of Concerns (SoC)**. NestJS, with its modular architecture, makes applying SoC almost effortless — but understanding _why_ it matters and _how_ to use it properly will help you write cleaner, testable, and future-proof code.
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## What is Separation of Concerns and Why it Matters?
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The basic idea is:
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> A program should be divided into distinct sections, where each section addresses a single responsibility.
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