Kotlin Developer

4.6173 hours48K learnersCertificate

Learn Kotlin for backend, frontend, and Android app development to expand your reach across multiple platforms with a concise language developed by JetBrains.

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JetBrains Academy

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Fit learning around your schedule. Suitable for all levels.

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Short, practical text lessons by seasoned developers.

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Integrated with professional tools by JetBrains.

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What you'll learn

Here, you will upgrade your functional programming expertise alongside testing, debugging, and data-organizing skills. Working on challenging projects, you will gain competence with smart algorithms, handy libraries, and advanced development tools. What you will do:

simplify your application design with functional programming;
master key programming concepts, such as binary numbers;
get familiar with helpful tools like Java and Kotlin libraries;
learn how to efficiently organize your data;
get experience with different data formats, such as JSON, CSV, etc.
practice making your code clear and concise even in most complex tasks;
learn how to find bugs in your code;
implement some popular algorithms;
work with professional development tools (IDE);
handle multiple tasks quickly and efficiently.

Show your commitment to the Kotlin cause, select the course, and have a nice Kotlin!

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Learn by doing

# 1

Apply knowledge into practice

You already know the theory. Now it's time to code like you do at work—in a professional IDE, with real project constraints, solving problems that actually matter. Welcome to software engineering as it should be.

# 2

Navigate complexity with surgical precision

Most developers waste months learning random concepts without seeing how they connect. Our interactive Knowledge Map fixes this. It shows exactly how every programming concept relates to others, helping you build a structured mental model of coding.

# 3

Copy the best. Then improve.

Here's what top engineers do that others don't: they study other people's code obsessively. When you get stuck on Hyperskill, you can explore solutions published by other developers. See their exact code. Understand their approach. Learn their tricks.

# 4

Code review that actually makes you better

We stripped code review down to what actually matters: does your solution work? Have you handled the edge cases? Is there a cleaner way to write this? Hyperskill acts like a competent reviewer who actually tests your code. Not genius-level analysis, not architecture debates — just solid feedback on making your code better.

Elevate your engineering mastery through real-world challenges

Master advanced engineering concepts through ambitious projects. Each project deepens your expertise and transforms you from an experienced engineer into an exceptional one.

Phone Book (Kotlin)

You suddenly remember you need to call your aunt and wish her a happy birthday, but how do you find her number quickly in a giant phonebook? Write a program that will solve this problem once and for all. Create a phonebook that allows you to find the information you need quickly and easily. Names and numbers, here we come.

Graduate

Minesweeper (Kotlin)

They say a minesweeper makes only two mistakes in their life: the first is their choice of occupation, and the second one is fatal. In this project, you will create your own, safe "Minesweeper" – a game that will be a brain teaser for both you and your players.

Maze Runner (Kotlin)

Mazes are amazing: keep running, find the exit if you can! If you are not too happy about getting stuck in the actual maze, you can entertain yourself with a virtual one. In this project, you will write a program that generates mazes and looks for a way out.

Explore all projects

Topics covered by this course

Types and data structures

64 topics

Fundamentals

60 topics

Additional instruments

54 topics

Object-oriented programming

47 topics

Control flow

40 topics

Algorithms and Data Structures

38 topics

Concurrency and parallelism

29 topics

Math

23 topics

Basics

12 topics

Advanced features

11 topics

System administration and DevOps

11 topics

Frontend

6 topics

Kotlin Multiplatform

3 topics

Mobile

1 topic

Learn from the industry experts

JetBrains Academy

JetBrains Academy is a part of JetBrains, a global software company specializing in the creation of intelligent, productivity-enhancing tools for software developers and teams. With years of expertise in software development and education, JetBrains Academy empowers more than a million people worldwide to learn and teach computer science, and help organizations inspire their teams to reach their goals in tech. Professional development tools play a big role in computer science education. This is why JetBrains Academy courses offer integration with JetBrains IDEs. This integration assists learners in getting experience with real development processes to streamline their learning curve at future work.

Your peers think Hyperskill rocks

Akbar Hamaminatu

6 days ago

The Kotlin Developer course offers a well-structured, hands-on path to mastering Kotlin, taking you from core syntax to advanced concepts like functional programming, algorithms, and concurrency.

Anatolijs Tolstihs

2 months ago

Personally, this course became a complete disappointment for me. Especially considering that the course is claimed to be from the creators of the language. Despite having a huge amount of information and topics, some of them seem unnecessary and as if they were deliberately added just to make you sp ...

EVGENII MORGUNOV

9 months ago

I have learned how to implement and compare different search and sorting algorithms, including linear search, bubble sort with jump search, quick sort with binary search, and hash table search. I also gained experience in measuring and analyzing the performance of these algorithms. One difficulty I ...

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Course provided by JetBrains Academy

Anonymous 154248806has successfully completed the courseKotlin Developer

Issue date November 26, 2025

399 topics completed

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