Learn the basics of backend and server development with Ktor, written in Kotlin.
140 learners
Level Basic
Course period Unlimited
Reviews from Early Learners
5.0
보키
Thank you! I enjoyed watching it. The way you write code & develop feels similar to mine, so it was nice to see..! - Appropriate layer separation - Core logic handled by services - Domain handles parts that need object responsibility - Writing SQL first before creating ORM persistence layer queries, etc. - Method placement, etc. I've been mainly using Line's JDSL recently, but I'm planning to apply Exposed to future side projects. I created one repo and kept updating to main without creating branches, so it's about 60 commits now! Now let me mention some areas that feel a bit lacking.. 1. Looking at the repo, it seems like you started in May 2024..! As of October 2025, Ktor is now up to version 3.3.0, so there are some changes..! Still, I think it would be great if you could add updates continuing from the last lecture about once every 3-6 months! 2. Besides global request/response interceptors, if there's common logic for specific operations, is there a way to apply it like Spring AOP? 3. If actually deployed to AWS, how much less CPU/RAM resources would it use compared to Spring..!? 4. Usually with JPA, we use Querydsl to handle dynamic queries safely, but I was disappointed that there wasn't coverage of how to handle dynamic queries in Exposed (only PathVariable, not dynamic queries created with QueryString) 5. For unit tests, slice tests, and e2e tests in Ktor, what's commonly used? I wrote about various things because I have many hopes..😊 Still, the course was really enjoyable to watch! I think I'll also consider Java with Spring+JPA+Querydsl(openfeign) and Kotlin with Ktor+Exposed going forward. Thank you.
5.0
saechimdaeki
I enjoyed watching it. Thank you for the great lecture.
5.0
ALPHA MOON
It was great to be able to understand Ktor. Thank you. It seems like it will be very helpful for basic server development. I will study the advanced version further.
Ktor Basic Usage
Kotlin ecosystem frameworks such as Koin, Exposed, etc.
Core Concepts of Web Server Development
Advanced Kotlin Language Concepts
👉 I want to try server development, but Spring seems difficult.
👉 Do you know Kotlin while developing Android, but want to try server development?
👉 Are you preparing for employment by learning the core skills needed for server development?
👉 Are you interested in Ktor but there are no suitable lectures ?
👉 Do you know the basics of Spring (Spring, Spring Boot) and want to learn the next framework?
In this lecture, you will learn server development using Ktor, a new web framework written purely in Kotlin, and even create a practical project.
Beyond using ktor, try using popular open source tools in the Kotlin ecosystem, such as koin and exposed, and compare them with Java technologies, such as Spring, Spring Boot, and JPA.
As you build your project, you will learn core concepts of server development (domain design / architecture / dependency management / HTTP / REST / SQL / cookies, sessions / login, logout / authentication, authorization, etc.).
⭐ ️Let's create a coffee ordering application similar to the remote order of Byulda ️️bang ⭐ ️.
✅ Login / Logout / Order, Cancel / Admin Functions
✅ We have included everything from designing for security and performance.
✅ All screen development sources are provided. (All source code used in the lecture is provided.)
Let's introduce the Ktor framework. We'll examine its features and the reasons for its popularity, and then proceed with setting up the environment for implementation.
To better understand and use Ktor, learn advanced Kotlin function concepts (extension functions/lambdas/DSL).
Let's access a database using Exposed, Kotlin's ORM framework. This article introduces Exposed and discusses its design implications.
We'll introduce the need for layered architecture patterns and use Koin to address the inconveniences associated with not having a dependency injection framework. We'll also explore Kotlin's delegation concept.
Covers everything from easy concepts to advanced topics, from basic server development (handling requests/responses) using Ktor to custom plugin development.
We'll build a project from scratch, covering practical requirements. From login, sign-up, and logout to authentication, authorization, and user and administrator functions, we've covered essential practical aspects.
Perform the additional steps required for environment-specific deployment using a single source. You can deploy using the CLI without the help of an IDE.
🙇♂ To save your precious time
If you find the explanation a bit slow, we recommend listening at 1.5x/2x speed .
Operating System and Version (OS): All operating systems, including Windows, macOS, and Linux, are supported. The course will be conducted on macOS.
Tools used: Intellij Ultimate / Community version
PC specifications: PC with basic specifications capable of Internet access
Learning materials provided in PPT and GitHub source code formats
It would be good to know about Java and Spring.
It's good to know about Kotlin.
This lecture is copyrighted by the instructor (ChaeChae Code). Unauthorized distribution and duplication are prohibited. The learning materials are also copyrighted, and any use for purposes other than personal learning is prohibited.
Who is this course right for?
Those who want to acquire server development knowledge while developing Android
For those who want to compare Spring and Ktor directly
For those who want to learn about the technologies of the Kotlin ecosystem
For those who want to learn the core concepts of web server development
140
Learners
13
Reviews
8
Answers
4.9
Rating
1
Course
I am a developer who never imagined I would become one.😅
It feels like I'm wearing the perfect outfit now.
I want to help those of you dreaming of becoming developers.
- (Current) Backend Engineer at a Kakao subsidiary - (Educational Activities) Fast Campus online instructor
- (Current) Backend Engineer at a Kakao subsidiary
- (Educational Activities) Fast Campus online lectures
All
28 lectures ∙ (6hr 22min)
Course Materials:
3. About Ktor
12:14
All
13 reviews
4.9
13 reviews
Reviews 1
∙
Average Rating 5.0
5
It helped me a lot. Thank you.
Thank you for taking the class, combogo! I hope you make fun projects while using ktor! 😀
Reviews 60
∙
Average Rating 5.0
5
Thank you! I enjoyed watching it. The way you write code & develop feels similar to mine, so it was nice to see..! - Appropriate layer separation - Core logic handled by services - Domain handles parts that need object responsibility - Writing SQL first before creating ORM persistence layer queries, etc. - Method placement, etc. I've been mainly using Line's JDSL recently, but I'm planning to apply Exposed to future side projects. I created one repo and kept updating to main without creating branches, so it's about 60 commits now! Now let me mention some areas that feel a bit lacking.. 1. Looking at the repo, it seems like you started in May 2024..! As of October 2025, Ktor is now up to version 3.3.0, so there are some changes..! Still, I think it would be great if you could add updates continuing from the last lecture about once every 3-6 months! 2. Besides global request/response interceptors, if there's common logic for specific operations, is there a way to apply it like Spring AOP? 3. If actually deployed to AWS, how much less CPU/RAM resources would it use compared to Spring..!? 4. Usually with JPA, we use Querydsl to handle dynamic queries safely, but I was disappointed that there wasn't coverage of how to handle dynamic queries in Exposed (only PathVariable, not dynamic queries created with QueryString) 5. For unit tests, slice tests, and e2e tests in Ktor, what's commonly used? I wrote about various things because I have many hopes..😊 Still, the course was really enjoyable to watch! I think I'll also consider Java with Spring+JPA+Querydsl(openfeign) and Kotlin with Ktor+Exposed going forward. Thank you.
Hello! It's been a really long time since I've left a reply. You're right, it's now been updated to version 3 and beyond, and the documentation has changed quite a bit since the course was filmed, so it looks like the course needs to be renewed haha I'll definitely work on preparing that! Since I haven't been able to update the course due to being overwhelmed with real-life parenting, I've lowered the course fee a bit out of guilt...ㅠhaha I'm glad to hear you enjoyed it - it makes me feel that all the hard work was worthwhile. Thank you!
Reviews 8
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Average Rating 4.8
Reviews 12
∙
Average Rating 4.9
5
I highly recommend ktor to anyone who is learning ktor for the first time or needs to introduce it to their company, as it provides easy instructions on everything needed to create a web application (application development, build, and deployment)!!!
Hello! I put a lot of thought into making this a useful lecture for those who are new to ktor. Thank you for your kind words! I hope you can apply it to your own projects. Thank you~!
Reviews 48
∙
Average Rating 5.0
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