Starting with SQL written like code: Kotlin and jOOQ

Learn the process of building essential observability in a microservices architecture (MSA) environment, from the basics to hands-on practice. Through step-by-step exercises, you will learn standardized data collection using OpenTelemetry, trace storage and search with Grafana Tempo, and visualization using TraceQL. You will also learn how to trace service flows through distributed tracing, identify bottlenecks, and analyze the causes of failures.

Try out authorization management easily and simply through Spring Security and JWT practice.

This course is a practical program where you will master Kotlin-based AI agent development by building your own coding agents. Using Koog, an AI framework built with Kotlin, you will learn step-by-step how to implement coding agents similar to Claude Code, Cursor, and Junie. Koog is more than just a simple server-side framework; it integrates seamlessly with Spring and offers the scalability to connect with various environments—including Android, iOS, Desktop, and Web—through Kotlin Multiplatform (KMP). By building intelligent agents that can read, analyze, modify, and generate code, you will gain hands-on experience in AI agent architecture, strategy, context handling, and tool integration.

We will refactor a web application built with Java + Spring Boot to Kotlin + Spring Boot and implement additional requirements. In the process, we will use Junit5, SQL, JPA, and Querydsl, and cover the pros and cons of various methods from the design and implementation perspectives.

Through this lecture, you can learn about the characteristics and background of the Kotlin language, grammar and operation principles, usage examples, and things to be careful of when using Java and Kotlin together.

This is a lecture for beginners in Kotlin functional programming. After learning the syntax related to functional programming, you will learn what side effects, pure functions, and referential transparency are, and how to pass functions back and forth and use them in practice.

Kotlin Programming Language, which you can learn by practicing with 76 examples. You have to develop in Kotlin starting tomorrow, but you don't have time to study the grammar? Let's quickly learn all the grammar of Kotlin with the examples provided in this lecture.

3D Globe Article Service with ThreeJS and SpringAI | Neo + Essential Create your own 3D globe article service using your personal chatbot and ThreeJS!

Learn Springboot + Android(Compose) RestAPI Board Creation Faster Than Anyone Develop a CRUD server with Springboot and create your own board with Android!!

Learn Springboot + iOS RestAPI Board Creation Faster Than Anyone Develop a CRUD server with Springboot and create your own board with iOS!!

This is a Kotlin coroutine lecture by the author of "The Definitive Guide to Kotlin Coroutines." This lecture covers everything from the basics to the core of coroutines. It provides various visual materials and clear explanations to help anyone easily understand asynchronous programming using coroutines.

Experience the power of Type Safe SQL with jOOQ!

Building your own emotional diary service with Spring AI + React It's time for our 4th project with Neo + Essential!

We will build a complete web application using React and Spring along with Kotlin Multiplatform. Through this process, you will understand Kotlin Multiplatform projects and gain experience in writing shared logic between client and server, Kotlin/JS-based React, and Kotlin/JVM-based Spring web programming!

This is a friendly explanation of things that beginners of Spring Boot and Kotlin will encounter while developing web from a beginner's perspective.

Kotlin mastery via virtual payment server course.

IntelliJ IDEA Conf 2025 is an annual online conference hosted by JetBrains that provides valuable sessions for Java and Kotlin developers. It covers various topics including AI adoption, Spring Boot, Gradle, Kafka, database management, and also shares insights on cloud integration, secure coding, developer performance improvement, and advanced development techniques. This conference is open to both professional and beginner developers, offering opportunities to explore the latest technologies along with productivity tips for writing high-quality code faster.