Using SOLID Principles to Write Better Code - A Crash Course (Udemy.com)
Software Architecture: A rapid, hard-hitting introduction to designing great object-oriented code in Java, C# and more.
Created by: Riaan Nel
Last updated January 2026
What you will learn
- Apply SOLID principles in order to write better code.
- Use SOLID principles to evaluate existing code.
- Understand the long-term benefits of writing good code.
- Understand the characteristics that help differentiate good code from bad code.
- Understand software architecture principles that can help you produce well-structured code.
How it compares
Against the other 518 rated Udemy courses in Software Development on CourseDuck:
- Rating4.2 out of 5higher than 10% of them
- Reviews3,279#55 of 519 by number of reviews
- Length0.9 hoursshorter than 97% of them
- Last updatedJanuary 2026more recently than 58% of them
Course Description
Write Better Code
It's easy enough to write code that works - however, code that simply 'works' just isn't good enough. Is it easy to understand? Is it easy to maintain? Is it easy to change? Is it easy to test? In other words - does it employ good software architecture principles?
This course is about helping you to learn how to write good code using tried-and-tested principles from the world of object-oriented software development in languages like Java and C#. Specifically, we'll unpack what SOLID means, what its benefits are, and how you can apply SOLID principles in order to improve the architecture of your own code - regardless of which object-oriented programming language you use. You'll learn how to look at code, identify problems, and how to improve the code by using SOLID principles. To help you with this, the course also contains a quiz that is focused on refactoring code to conform to SOLID principles.
It's a short course that you can work through in an hour, but it's intended to equip you with skills that you can apply throughout a lifetime of programming!
Some Review Feedback
"The content is structured, step by step is laid out clearly and concisely, the code examples are definitely the icing on the cake as it takes the principles into real world examples which are very valuable."
"Great course with easy to understand examples. Good for first time explanation and as a refresher"
"Firstly, the course focuses on a really important topic that most developers usually skip over, and secondly the course itself is really well thought through with the examples explaining exactly how code can be improved for readability, testing, and to ensure the code is easy to change later on."
"The salient points were well covered, and the code examples are clear enough to illustrate and support each SOLID principle discussed. As a student, we’re able to understand and appreciate the benefit of applying SOLID principles, and writing better code."
This course includes the option of a 30-day, no-questions-asked refund if you're not happy with it.
Instructor Details
- 4.2 Rating
3,279 Reviews
Riaan Nel
I am a software industry professional, currently employed as a consulting architect. I hold a BSc in Business Information Technology (with First Class Honours) from the University of Greenwich in the UK and an executive MBA (with Honors) from the Quantic School of Business and Technology in Washington.
Throughout my career, I've designed and developed software for a number of different industries, I've written about software development, and I've lead and mentored development teams. I am passionate about software development, craftsmanship, efficient and effective development processes, team culture, and continuous learning.
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Reviews
By CESAR VICENTE LOBO SANCHEZ on 9/20/2026
El curso explica de forma teórica los conceptos relacionados con los principios SOLID. Además, el instructor aporta su propia interpretación y experiencia sobre cada uno de ellos, lo que facilita la comprensión de los temas y ayuda a contextualizar mejor su aplicación. Aunque la cantidad de ejemplos es limitada, estos son claros y fáciles de seguir. Esto permite identificar de manera práctica cómo aplicar los principios SOLID en distintos escenarios y comprender mejor su importancia en el desarrollo de software. En general, el enfoque del curso contribuye a reforzar tanto el entendimiento conceptual como la aplicación de estos principios en situaciones reales.
By Anonymized User on 1/24/2024
I feel like I got a good break down of SOLID in a period of time that wasn't overwhelming. I was able to compile notes in my own words easily since there was a quote, a "this principle encourages..." some desirable trait for each principal. The quiz helped me know what I understood most/least. I liked the summary's SOLID principles in practice section that gives an example of these in working code since it's hard to visualize in snippets.
By Anonymized User on 1/16/2024
The course wasn't that helpful for me. The course was just him reading from PowerPoints. I would have like if he did a mini project where we can see him actually coding and implementing the principles.
By Ashwin K on 1/7/2024
The course was a good one for a crash course, covering all the principles with relevant examples. What stood out was 2 different quiz, one for theory and one with practical examples for code refactoring. Suggestion: The sound of the video could be improved. Seems to be low most of the times
By Anonymized User on 10/2/2023
The "1-Hour Crash Course: Using SOLID to Write Better Code" on Udemy is a fantastic resource for learning SOLID design principles. The course stands out for its simplicity, clear explanations, and easy-to-understand examples. The instructor does an excellent job of breaking down complex concepts into straightforward language, making it accessible to learners of all levels. In just one hour, you'll gain a comprehensive understanding of SOLID principles and how to apply them in your coding projects. Highly recommended for anyone looking to improve their coding skills quickly and effectively.
By Orhan Özsoy on 3/6/2021
Lectures are understandable for anyone and examples are clear. Also quizzes are helpful for practicing over solid principles. Edit: I watched again because i wanted refresh my info about solid. I want to add that also, The tutor is replying your questions pretty fast with good explanation.
By Nicolas Cassulo on 12/6/2020
It's great to get to know the core concepts that are involved in using SOLID for better code development
By Luis Caliz on 11/26/2020
The examples really helped to understand each principle. Everything was very clear and explained in detail.
By Sifiso Shezi on 9/22/2020
Thanks to the Lecturer...!
By Andy Cooke on 9/20/2020
So far this is better than another SOLID course I looked at on Udemy, because it seems to be a little more practical - showing how abstract ideas can be applied to improve code.
By G Chandran Chandran on 9/17/2020
The content is the course is good. And the code background is veryhard to see casually
By Song Vo on 9/12/2020
This course is simplistic enough for you to capture and get basic ideas of SOLID. I need focus and thinking carefully in Quiz Refactoring. This is most important part in this course.
Quality Score
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Overall Score : 84 / 100



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