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SOLID Principles: Introducing Software Architecture & Design (Udemy.com)

Gain mastery over SOLID Principles and write clean and well-designed code in Object Oriented Languages like Java etc.

4.4
25,005 reviews

Created by: George Sonora

Last updated June 2026

Our take

Based on the ratings of 25,005 students, a sample of their written reviews and the syllabus, as the course stood in June 2026. No course pays to be reviewed.

George Sonora's course is a short tour of the five SOLID principles, one section each, spread over 28 lectures and about 2.1 hours. It leans on illustrations and real-world analogies, then adds live sessions where existing code is picked apart and redesigned. The requirements are light: beginner knowledge of an object oriented language and ideas like inheritance. More than 90,000 students have enrolled, and the syllabus shows an update in June 2026, so it is not stale.

Reviewers mostly like the clarity. They say the examples stick and the explanations are brief without padding, and roughly nine in ten ratings are four or five stars. The teaching comes across as clear but slow. Complaints cluster in a few places. The examples are simple compared with real projects. The live coding screens are hard to read. One reviewer found the pace dull even at double speed, and another wanted more depth on dependency inversion. One asked for Python examples.

Because it is so short, it costs little time and works as a first pass. One reviewer called it a quick glance at SOLID, and that is a fair way to think of it. Pick it if the principles are new and you want the vocabulary and the core pictures. Anyone who already knows them, or wants to see them applied to tangled production code, should plan on a book or a more code-heavy course afterward.

Best forDevelopers with a little OOP behind them who want SOLID explained once, clearly, in about two hours.
Skip it ifYou want messy real-world codebases, deep treatment of dependency inversion, or faster narration.

Pros

  • Each principle gets its own short section, with examples reviewers say make the idea easy to remember
  • Explanations are brief and padding-free, so the whole set of principles fits in about two hours
  • Live sessions take existing code and redesign it after applying each principle
  • Refreshed in June 2026, with hand-scripted subtitles for watching on mute

Cons

  • Examples are simple and don't look like messy real-world code, according to one reviewer
  • Narration is slow and wordy; one reviewer was bored even at 2x speed
  • Live coding screens are low resolution, and dependency inversion feels thin to some
A very good explanation of SOLID principles. The course was as I expected. Explanations are brief an efficient without unneeded balast. I recommend this course
Jure Senegačnik, a student

Listed as Beginner, but it expects basic OOP such as inheritance. Total coding newcomers should learn that first.

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What you will learn

  • Anyone can code, but quality code is hard to come by. Make yourself stand out by learning how to write quality code.
  • Learn basic software architecture by applying SOLID principles.
  • Apply SOLID principles in order to write quality code, as a software engineer.
  • Well-crafted illustrations to help understand the basic concepts. Minimal bullet point slides.
  • Learn what differentiates elegant and robust code from badly designed code.
  • Get the concepts right using real world analogies.
  • Live sessions where existing code is analyzed and design holes are picked.
  • Hands-on sessions where existing code is re-designed and revamped after applying SOLID design principles.

Course content

7 sections · 28 lectures · 2.1 hours of video

  1. 1Introduction 1 free preview1 lecture · 3 min
  2. 2Single Responsibility Principle 1 free preview5 lectures · 28 min
  3. 3Open Closed Principle5 lectures · 21 min
  4. 4Liskov Substitution Principle5 lectures · 25 min
  5. 5Interface Segregation Principle5 lectures · 23 min
  6. 6Dependency Inversion Principle5 lectures · 23 min
  7. 7Course Summary2 lectures · 3 min

Who it is for

The instructor says it suits

  • Programmers who want to write quality code.
  • Developers who want to create well-designed software.
  • Wannabe software architects.

What you need before you start

  • Beginner level knowledge in any object oriented programming language.
  • Basic object oriented concepts like inheritance etc.

How it compares

Against the other 1,182 rated Udemy courses in IT & Software on CourseDuck:

  • Rating4.4 out of 5higher than 30% of them
  • Reviews25,005#13 of 1,183 by number of reviews
  • Length2.1 hoursshorter than 82% of them
  • Last updatedJune 2026more recently than 78% of them

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Course Description

     Anyone can code. But what differentiates a professional software engineer from a hobbyist coder is how well-designed and well-coded the final product is. Code quality is hard to come by. Unfortunately, most coders start straight without understanding basic concepts of software design. This course will help a budding coder, as well as an established programmer who wants to learn better design and write quality code.

     It is really important that you grasp the core concepts of SOLID thoroughly. Once you get the fundamentals right, writing quality code will come naturally to you.There are tons of free YouTube videos on SOLID, but they try to teach you in bits and pieces, and don't pick the right analogies and code snippets. What you need is a holistic picture, which is what this course aims to provide. I have spent considerable time and effort to come up with the content for this course. Each and every concept, each and every analogy, each and every code example has been meticulously picked in such a way the design principles stick to your mind. I have used graphical illustrations and real world analogies wherever possible to drive home the point.

      Something else that is special about this course - The subtitles are hand-scripted and accurate. I have even checked the timings to guarantee accuracy. Most courses come with subtitles that are auto-generated using a Speech-To-Text Engine, the accuracy of which is fairly low. But not mine! I have taken pains to script my course to perfection and include the subtitles too. So if you are at work, and you want to put me on mute, please feel free, although I would like you to hear my voice narration. If you want to put me on mute, just enable the subtitles in Udemy and play!
Read More Beginner Beginner Level product length iconTime: 2.1h

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Instructor Details

George Sonora

After graduating with an engineering degree in Computer Science , I stepped on the IT bandwagon in the 1990's and boy, what a ride its been! I have laid my hands on almost all facets of IT from operating systems, programming languages, algorithms to Cloud Computing, AI & ML. I am an evangelist for effective teaching methodologies. My focus is ALWAYS on getting the core concepts right, and on doing through learning. IT is all about hands-on experience. All my courses are well illustrated. I hate reading through slides as I have been a victim of rote learning myself. Ever since I took to teaching, I have tried to take the monotony out of learning, and tried to make it fun, colorful and exciting. Other than coding, and teaching, I like to socialize with my students. My response to your queries is just a few hours away!

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Reviews

4.4

25,005 ratings on Udemy

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By Pieter Kruger on 7/23/2026

The illustrations really helped to present the SOLID principles in a very practical way. It would have been nice, though, if Python examples could also have been included. And perhaps the live coding sessions could have used new or different examples to reinforce the concepts.

By Suhash Sarkar on 7/4/2026

The Dependency Inversion section would have been even more effective if it included some graphical representation or at least boxed highlights while explaining the concept. This would help students better relate to the specific areas being referenced during the explanation.

By Moneeb Ur Rehman on 6/1/2026

Yes, it gave me a lot to think about for future core architecture design. The audio quality was good and the concepts were explained very well. Thanks!

By Gonçalo N. Paiva Amador on 5/14/2026

I liked the course I think the examples are relatively useful. A few suggestions: I don't see what the live coding section bring to the table vs the former lesson where the same is explained. I think and suggest that the live example are different cases to reinforce or help to better ciment the concepts. I heard on some videos background noise if reshot I would recommend trying to do it in a sound prof division. Section 6 is the only where we jump to the code without a good metaphor example. It made a little harder to understand. May be just me.

By Lucas Bärenwald on 4/7/2026

The instructor explained the topics clearly. The live coding sessions were redundant. They could have been a good opportunity to present more detailed examples, but in the end they were just repeats of the examples that had already been shown.

By Vishal Palla on 4/2/2026

This is by far the best Udemy course on SOLID principles. The instructor explains each principle with remarkable clarity, using real-world examples and practical code snippets that make the concepts easy to grasp and apply. The course feels highly interactive and effective, striking the perfect balance between theory and practice. The author’s explanations are concise, well-structured, and very easy to follow, making this an outstanding learning experience for anyone looking to master SOLID principles.

By Sandiso Mtakati on 3/23/2026

Now I can I am able to explain and implement the SOLID principles. Every software programmer or engineer should take this course as it improves not just your code but your overall software design.

By BISWAJIT KAR on 3/15/2026

Its a good course for someone looking forward to a QUICK BRUSH UP of the SOLID principles. The live coding sessions didn't add much value as they were pretty much explained in the previous videos. A few more coding problems/examples, showing how a badly written code can be improved with these principles, would have been useful.

By Abid Hayat Khan on 2/28/2026

Alhamdulillah, the way of explanation of the instructor is very precise, clear and upto the point. With the help of real-word analogy for each S, O, L, I & D principles and their corresponding coding examples, it made the concept very easy to understand and apply in our projects.

By Anonymized User on 2/27/2026

All Principles was very well explained with good examples. ISP and DIP topics were little confused. It would be great if that topic will be explained in more detailed. Examples of Python also would be more helpful.

By Lloyd Edano on 11/14/2020

very good explanation and analogy to real life objects

By Kelvin Mihingo Nganga on 11/7/2020

A solid introduction.

Showing 12 of 322 reviews

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Overall Score : 88 / 100

SOLID Principles: Introducing Software Architecture & Design
Visit course on Udemy Write a review
  • Video Duration: icon 2.1h
  • Price: $15.99
  • Provider: icon Udemy
  • Updated: icon June 2026
  • Level: Beginner Beginner
  • Language: icon English
  • Certificate: icon Yes
  • Lectures:28 in 7 sections
  • Students:90,300
  • Subtitles:13 languages
  • Udemy badge:Bestseller
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