---
title: "Discussion on \"Engineering From First Principles: Why Software Architecture Must Start With the Domain\" | Hashnode"
description: "Discussion on \"Engineering From First Principles: Why Software Architecture Must Start With the Domain\". Modern engineering disciplines do not begin with tools. They begin with first principles.\nWhen engineers design a better refrigerator, they do not start by selecting a compressor brand or a control board. They start by reasoning about thermodynamics,..."
url: "https://hashnode.com/posts/engineering-from-first-principles-why-software-architecture-must-start-with-the-domain/6952333d58b971d49f5a502d"
---

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# [Engineering From First Principles: Why Software Architecture Must Start With the Domain](https://blog.leonpennings.com/engineering-from-first-principles-why-software-architecture-must-start-with-the-domain?utm_source=hashnode&utm_medium=feed)

Modern engineering disciplines do not begin with tools. They begin with first principles. When engineers design a better refrigerator, they do not start by selecting a compressor brand or a control board. They start by reasoning about thermodynamics,...

Dec 29, 2025 · 8 min read · blog.leonpennings.com  
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-   [#software-engineering](https://hashnode.com/tag/software-engineering)
-   [#software-architecture](https://hashnode.com/tag/software-architecture)
-   [#programming-essentials](https://hashnode.com/tag/programming-essentials)
-   [#software-efficiency](https://hashnode.com/tag/software-efficiency)

## Written by

[Leon Pennings](https://hashnode.com/@leon74)

@leon74 · Zoetermeer, The Netherlands

  
[View profile](https://hashnode.com/@leon74)

Trying to put engineering back into software development

I specialize in developing object-oriented java applications that aligns with business objectives, using Domain-Driven Design principles to ensure technical decisions drive tangible value. By focussing on a deep understanding of the business domain, I craft solutions that solve real problems while maximizing ROI. My approach evaluates the cost/profit ratio of every decision—only implementing technologies when the benefits outweigh the costs. I’ve been called in to revive stalled projects and address challenges where others have struggled. My focus is on creating software that not only meets but exceeds business expectations. Whether working with legacy systems or modern frameworks, I select the right technologies to maximize value—not just follow trends. I believe software should be a strategic asset, and this mindset guides every decision I make in development.

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