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Complete Kotlin Design Patterns masterclass (Udemy.com)

Improve your coding skills by learning Software Design Patterns applied to Kotlin and Android development

Created by: Catalin Stefan

Last updated February 2026

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What you will learn

  • Design Patterns
  • Proper Kotlin development
  • Creational Patterns
  • Structural Patterns
  • Behavioural Patterns
  • Coding practice

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Overall Score : 92 / 100

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Course Description

Kotlin is the main development language for the Android system.

Knowing how to build well structured programs and apps, that are scalable and robust is essential for every developer.

That's why I've created this course on Design Patterns for Kotlin.

Here you will learn how to apply popular patterns to your code, such as Builder, Adapter, Abstract Factory, as well as lesser known but very useful patterns, such as Composite, Decorator, Strategy etc.

This course will teach you how to structure your code so that it is more maintainable as it grows, and that it's easier to debug and test. When building a new project, you are not trying to reinvent the wheel, but instead to implement the correct solutions to the problems that you encounter.

It will also teach you the terminology that you need when you communicate with top level developers. When they say they implemented a factory for a piece of code, or the added a builder pattern for the creation of a certain object, you will immediately know what they mean.

This course covers 3 types of design patterns

  • Creational

  • Structural

  • Behavioural

We will also include code samples at each step of the way, so that you already know how to implement these patterns in practice.

Sign up today, and let's learn how to use Design Patterns in Kotlin.

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Instructor Details

Catalin Stefan

I am an avid learner and teaching enthusiast. I love creating videos and courses that enrich people's lives and help them have a better experience, both personally and professionally. 

I am an expert mobile application developer with over 10 years development experience. I enjoy making courses related to AI, software development and mobile apps, and want to share the knowledge I have acquired.

I create courses based on my professional experience. I hope to teach people skills that help them in their careers, allow them to acquire new skills and improve their personal relationships.

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Reviews

4.6

611 ratings on Udemy

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By Nithya Mahalingam on 9/10/2025

I recently completed this course and found it to be well-organized and thoroughly explained. The instructor effectively broke down the fundamental concepts, making the Composite Design Pattern easy to understand. To further enhance the learning experience, the course could benefit from the addition of a UML diagram to visually illustrate the relationships between classes, which would help learners better comprehend the overall structure. Additionally, including a naive or poorly structured implementation as a contrast would highlight the advantages of applying the pattern correctly. Overall, this course is a solid resource for anyone looking to deepen their understanding of design patterns, and I would definitely recommend it to fellow developers.

By Sebastian Schmidt on 8/27/2025

From the title I had hoped to learn how to design code in Kotlin using certain idioms to align nicely with the language featuers (as opposed to other languages like Java). In the end, this course shows language agnostic design patterns (which I already knew) that are coincidently implemented using Kotlin.

By Vladimir on 6/19/2025

Many thanks to the teacher for the excellent explanation of the design patterns and simple but succinct examples! As always, this teacher has an excellent course!

By Martin Morales on 10/16/2023

Really awesome course, I liked how to use design patterns in a simple way with unit testing. Would like to know how to apply this knowledge in a real project.

By Obed Andres Gonzalez Velez on 4/17/2023

Helps to refresh design patterns and how to implement them in Kotlin. A little more detail in some aspects, like kotlin language advantages for certain patterns, would be appreciated

By David Chhetri on 10/26/2022

The best design pattern course that I have ever taken. I have practised these patterns since many years, yet I gain a deeper understanding from these concise tutorials. I have purchased almost every course provided by Stefan and the reason is that it provides tremendous value. Thanks Stefan !

By Tara Fennell on 8/5/2022

While you can learn to program without knowing about patterns this course takes your skills to the next level and can help bring understanding to why certain programming choices were made and how you can follow similar patterns. I love the examples and the tests provided

By Jonel Antiojo on 6/30/2022

I have learned a lot from this course though I have hard time thinking of what scenario or instance I will be using each design pattern. it's an overwhelming knowledge. Thanks also for the simple unit testing part :D

By Francisco Jose Olivero on 2/16/2022

I would only say that it would be cool to also learn HOW to figure out when to use each one... maybe with more examples or even challenges for whom is taking the course. Other than that I think its good for a short course. I would probably rename it as CrashCourse or Intro to... since its not super thorough, anyhow it was worth it.

By Daniel Guglielmi on 7/21/2021

Excellent course, it includes the most important design patterns. The examples are small and good to understand the basic idea, I could apply them in real situations thanks to these examples. Very good.

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