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Lada Petrushenko for Hyperskill

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5 Kotlin Courses That Help You Build Portfolio-Worthy Projects

Hi, I’m Lada — Content Project Manager at Hyperskill.
In the previous article, we looked at our Python courses. This time, we’re doing the same for Kotlin.

Kotlin attracts a different kind of learner — future Android developers, backend engineers, or anyone looking for a modern, strongly typed language. That’s why our Kotlin courses are built around different end goals, from learning the basics to building real applications.

Some topics overlap between courses. If you’ve already completed a concept in one course, it carries over to the others — so you never repeat the same work.

Here’s a quick overview to help you choose.

Quick Comparison

Course Best For Project Examples What You’ll Learn
Introduction to Kotlin Complete beginners Cinema Room Manager / Minesweeper Kotlin syntax, variables, loops, functions, simple OOP
Kotlin Core Learners ready to go deeper Parking Lot / Tasklist Code structure, collections, OOP principles, file I/O, debugging, basic algorithms
Kotlin Developer Career switchers or multi-platform learners Maze Runner / Minesweeper Advanced Kotlin, functional programming, coroutines, flows, algorithms, design patterns
Android Developer with Kotlin Aspiring mobile app developers Simple Bank Manager / Secret Diary (IDEA) / Secret Diary (Android Studio) Dynamic UIs and navigation graphs with Fragments, data storage, Android Studio
Kotlin Backend Developer (Spring Boot) Aspiring backend developers Cinema Room REST Service / Web Quiz Engine REST APIs, Spring Boot, security, basics of HTML, CSS, and JavaScript, deployment tools

Note: Each course includes more projects than shown here — these are just some highlights.

The Courses


Introduction to Kotlin

CV-ready skills: Kotlin syntax, variables and data types, functions, conditionals and loops, lists and collections, basic OOP concepts, project structure, coding best practices.

This is the course to start with if you're completely new to programming or new to Kotlin specifically. You'll learn the fundamentals step by step: how to write and run simple programs, store and process data, control execution flow, and use functions to organize your code. You'll also get an introduction to object-oriented programming, which is essential for building larger applications later on.

Along the way, you'll learn why Kotlin is popular among developers today — especially in Android development — and how its modern features make coding cleaner and more efficient than in many older languages.

Perfect if: You've never written code before or are new to Kotlin specifically.

Kotlin Core

CV-ready skills: Object-oriented programming, functional decomposition, data structures, text processing, file system operations, debugging, working with Kotlin libraries.

Once you're comfortable with Kotlin basics, Kotlin Core takes you deeper into how real applications are designed and structured. You'll move beyond simple syntax and start writing cleaner, scalable code that's easier to maintain and extend. The course focuses on building problem-solving skills.

You'll practice decomposing programs into meaningful functions and classes, work with Kotlin's standard libraries, and learn to process text, store data, handle files, and debug your code effectively.

Perfect if: You know basic Kotlin and want to understand how things work under the hood.

Kotlin Developer

CV-ready skills: Advanced Kotlin features, functional programming, coroutines, flows, algorithms, data structures, design patterns, testing.

In Kotlin Developer, you'll explore advanced language constructs, functional programming techniques, and concurrency with coroutines and flows. You'll also deepen your understanding of algorithms, data structures, and testing while working with professional development tools such as Git. By the end, you'll be ready to take on Android, backend, or multiplatform projects.

Perfect if: You already know the core of Kotlin and want to build production-level problem-solving skills — or prepare for Android, backend, or multiplatform development.

Android Developer with Kotlin

CV-ready skills: Android Studio, UI layout and navigation, Fragments, data storage (local and remote), user input handling, app lifecycle, modern Android development practices.

If your goal is to build mobile apps, this is the course that takes you there. Android Developer with Kotlin focuses on creating interactive applications. You'll learn how Android apps are structured, how screens are displayed and connected, how data is stored, and how to design UIs that are functional and easy to use.

The course guides you through Android Studio step-by-step, from simple interface controls to multi-screen navigation and secure data storage. By the end, you'll be comfortable designing and implementing your own Android applications.

Perfect if: You want to start a career in mobile development or build apps that run on Android devices.

Kotlin Backend Developer (Spring Boot)

CV-ready skills: Spring Boot, REST APIs, JSON handling, authentication and authorization, data persistence, Gradle, Git, testing, deployment tools.

This course teaches you how to build server-side applications that handle real-world tasks, like managing data, securing access, and responding to user requests. You'll learn how to structure a web application using Spring Boot, connect it to a database for persistent storage, and implement RESTful APIs to allow clients to interact with your service. Along the way, you'll practice debugging, testing, and deploying your applications. You'll also gain foundational skills in HTML, CSS, and JavaScript to better understand the client side of web apps. By completing this course, you'll be able to design and develop scalable backend systems ready for production.

Perfect if: You're aiming for backend developer roles.

Which One Should You Pick?

Start with Introduction to Kotlin if you’re completely new to programming or new to Kotlin as a language.

Move to Kotlin Core if you already know the basics and want to understand how real applications are structured and how developers approach problem-solving.

Choose Kotlin Developer if you’re switching careers or want a deeper, more comprehensive view of Kotlin for professional development across different platforms.

Go with Android Developer with Kotlin if your main goal is to build Android apps and work with modern mobile development tools and workflows.

Pick Kotlin Backend Developer with Spring Boot if you want to focus on server-side development, APIs, and building scalable backend systems.

The nice thing about our approach is that all these courses are connected. Topics overlap, and your progress carries over — so you don’t have to relearn the same concepts from scratch.

No single course can teach you everything. But our Kotlin courses give you solid practical experience and portfolio-ready projects to help you grow as a developer and build skills that last.

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