[Beginner] Mastering Qt Usage Through 6 Projects (REST API)

Deterministically control AI agents through a 5-layer harness architecture and 4 workflow layers, and immediately apply a scalable project structure to real-world practice. (Based on Claude Code, but the same principles apply to other AI tools.)

🏆 English Speaking Coach AI Provided 🧑🏻‍🏫 🏆 Learn an English learning system that has proven effective, from starting at CSAT grades 4-5 to achieving OPIc IH and a TOEFL best score of 85, and even preparing for study abroad. From news reading to utilizing GPT prompts, Notion recording, shadowing, and AI conversation, you will master a complete learning loop of reading-speaking-correcting-rewriting through practice-oriented sessions.

AI Era: Opportunities and Mindset for Knowledge Entrepreneurship Made Easy with Writing and Media Creation (Prompt Engineering, Gemini, Kling) No coding knowledge or AI experience required! All you need is your own experience and ideas. Learn practical methods to combine your professional expertise with AI tools to create digital content. Based on this foundation, you can create your own content and get significant help with various digital businesses you've wanted to try.

Learn the core principles and practical implementation of Classic RAG, Graph RAG, and Agentic RAG. You will design dynamic routing systems that optimize token efficiency and latency, and build long-term memory systems that combine GraphRAG's relational network reasoning with Agentic RAG's self-evaluation loops. This course is designed to complete your expertise in designing advanced RAG architectures that can be immediately applied in professional practice.

Copilot used by working developers in the industry! From Copilot tips to unit testing and API integration testing, do it all with Vibe Coding! Leap forward as a 10x faster director with real-world industry know-how.

[Source Code Provided] No coding knowledge required. Build it instantly in your browser using Google's latest tool (IDX) without any installation! Stop studying coding syntax! This is an ultra-fast, hands-on course where you'll build an RAG chatbot that perfectly understands internal company documents through AI conversation (Vibe Coding) in the Google IDX environment and deploy it live to the web.

How did Assistant Manager Kim, who worked overtime every day, become a "leave-on-time pro" in just 1 hour? The secret to reclaiming your "clock-out time" Staying up all night because an Excel formula broke, or having an entire report ruined by a single typo—every office worker has experienced this at least once, right? This course was designed to put an end to that "recurring pain." You don't need to memorize complex coding syntax. We utilize Cursor AI, an AI-powered tool that writes code based on text commands, and Streamlit, which allows anyone to easily create websites. I have captured the entire process of solving the "pain points" I personally faced in the field—such as merging files by branch, automatically classifying items for repair, and generating infinite PDF certificates—all by "conversing" with AI without typing a single line of Python code yourself. By the end of this course, you will be reborn not as a mere office worker, but as a "Digital Transformation Expert" who revolutionizes your team's work efficiency.

Now your imagination becomes the best game design document! With AI, you can complete your first game by having fun conversations as if assembling LEGO blocks. Try using Google Gemini Pro for free!

Are you still coding alone? We are now in an era where AI handles 99% of the work. Instead of memorizing complex syntax, this course teaches you how to turn Google's powerful AI, 'Gemini Pro,' into your 24-hour AI development partner. You will learn the fundamental principles of Flutter using the paid Gemini Pro model for free and turn your ideas into reality through professional-level projects.

It's okay even if you don't know the first thing about coding. We are in an era where AI writes the code for you as long as you have an idea! This course is not just about learning a programming language. It is a practical course where you will learn the 'most modern way of development'—giving commands (prompts) to the powerful AI code editor 'Cursor AI' to directly build the programs you've imagined.

The trending "Vibe Coding"! You can learn how to develop and deploy a website (Next.js) with just a few clicks using AI tools. We will even show you how to develop using Google Gemini Pro for free.

From Git basics to a troubleshooting guide! This is a lecture where a practitioner explains everything clearly. I will share all the core secrets and help you work in the field without any issues, even if it's your first time!

Take the leap from a beginner to an intermediate developer by learning Qt/QML programming skills and the latest technologies through real-world projects.

Learn Qt and Python programming skills through real-world projects. This course will help you grow from beginner to intermediate level by learning the latest Qt and Python programming trends and techniques.

Qt is a powerful framework that provides not only GUI but also various functions such as network, database, multimedia, IPC, etc., so you can easily and quickly develop applications in various fields with Python. In this lecture, we will learn how to effectively utilize Qt in Python through various examples starting from the basics of Qt.

QML is a programming language provided by Qt for creating user interfaces. It is similar to JSON and allows the use of JavaScript. By using QML instead of C++, you can easily develop modern, sophisticated UIs without having to use C++.

This is a game development & algorithm course that focuses on the algorithms and principles of 2D game development from the ground up using Windows API and C++.

If you want to understand game engines, building one yourself is the fastest way. This is a project-based course where you will implement the core structure of a console game engine using C++ and complete projects including Sokoban and a flight shooting game. It provides a perspective that allows for a deep understanding of the structures of the Unreal and Unity engines.

Are you having trouble using CMake? After taking this course, you too will be a CMake expert.

Let's develop an SPA with Vanilla JavaScript while learning everything from basic syntax to advanced concepts🔥

This course goes beyond simple kit assembly; it is a process of building the open-source project Otto DIY from scratch. We have included everything from the secrets of component selection and hardware operating principles to Arduino coding (functions, variables, loops), and even the troubleshooting know-how for voltage drops, which beginners find most challenging. Don't just stop at theory—develop the skills of a 'true robot maker' by completing your own smartphone-controlled robot!

Don't practice C in a boring environment, have fun practicing C by building real, usable Windows applications.

This is the process of refactoring a game engine made with C++ using the DirectX 11 library. It was developed by inferring internal code, allowing you to think about the internal principles of the Unity engine. This is not a project at the level of a rendering program typically covered in academies/lectures. It builds a real game engine incorporating various technologies, from the build system and scripting.

[Web Dev Beginners Only] Step-by-Step Guide to Spring Boot REST API

This course goes beyond simple grammar explanations and focuses on developing C++ programming skills that can be applied immediately in the field. Throughout my teaching, I have directly addressed common challenges faced by many learners—such as struggling to understand the STL or feeling confused by file handling and exception handling concepts. Based on this experience, I provide step-by-step explanations to ensure even complex concepts are understood easily and clearly. Furthermore, this course is not just about delivering theory; it is structured around: 👉 "Why this concept is necessary" 👉 "How it is used in actual code" 👉 "How it is applied in professional practice"

The best coding test lecture that helped students pass Naver, Kakao, and Samsung coding tests in just 10 weeks!

[Newbies to Web Development Only] Let's Build a Spring Boot REST API Step-by-Step, the Easy Way

C++ programming methods required in the field! It's time to move beyond C-style coding and start coding like a true C++ developer. This course is designed to help you build fundamental programming skills by learning the basic syntax of C++ step-by-step, growing to a level where you can apply them immediately in real-world practice. You can create practical projects using Arduino or develop the programming skills necessary for game development using Unreal Engine. Through this course, you will naturally boost your programming confidence and become comfortable utilizing C++ in practical applications.

Easily learn data structures and algorithms, which were difficult to learn with C++, in easy steps. Unlike typical lectures, this course combines data structures and algorithms, allowing you to learn them simultaneously while considering their interrelationships.

This course is for beginners who have started coding tests but are confused, wondering, “Am I just not good at this, or is there still more I need to learn?” Through easy problems, you will master input processing, strings, data structures, and basic mathematical concepts, while learning the right way to approach problems from the very first step.