The Essential Crash Course Guide to Acing Backend Interviews in Just 3 Days [Naver, Kakao, LINE, Coupang, Baemin, Danggeun, Toss]

A course that helps you understand core database concepts and trains you to explain them verbally in interviews.

Make the most of relational database systems!

I will transform the Engineer Information Processing written exam (Subjects 1–5) from a "test you solve by memorizing" into a "test where you connect clarified points directly to your score." This is an ultra-compressed lecture designed to help you grasp the entire flow within 3 days. It extracts only the core concepts repeated in past exams, structured to be understood even if viewed right before the test. The course is designed for short-term success by clearly distinguishing between frequently confusing concepts, trap points in multiple-choice options, and what needs to be memorized versus what only needs to be understood. "I'm short on time, but the scope is too broad." "I feel like I know the material when reading the book, but I keep getting the questions wrong." This lecture is for students facing these exact challenges.

[TPC DB!] A course that allows you to learn database modeling while thinking, learn database modeling step by step, and master everything from database modeling to web programming implementation all at once.

With the arrival of the AI era, the skills required of developers are becoming increasingly complex. You might have thought, "I just need to be good at frontend," but when you try to create your own service or integrate AI features, you eventually hit a massive wall called the backend. However, as you try to start backend development, are you overwhelmed by how much there is to learn—from database design and authentication (Auth) to storage management and complex infrastructure setup? Now, you can lay down that heavy burden. In this course, we use Supabase, which solves all these backend functions at once. We will guide you through the fastest shortcut to becoming a full-stack developer who can "instantly" complete a backend without complex server knowledge and bring ideas to life immediately.

When faced with a single slow query, what should you look at, what should you fix, and how can you prove it? This hands-on, 55-lesson course teaches you by setting up a virtual online store with one million orders on your local MySQL 8.0 and working directly with EXPLAIN, EXPLAIN ANALYZE, and index design.

This is a lecture using the only domestic e-government framework and Layered Architecture, which are widely used in practice but not available in Korea. In this lecture, we will learn how to build the backend and server side of web development using the Spring Framework and the e-government standard framework.

A course where you understand the core concepts of Java and Object-Oriented Programming (OOP), and even train to explain them verbally in interviews.

For learners struggling with large-scale data analysis and slow queries, I provide practical, hands-on guidance from design through tuning.

A Channel Talk interviewer will personally break down the difference between rejected and accepted answers to the same question and prepare you for real interview follow-up questions.

A Channel Talk interviewer will personally analyze the difference between unsuccessful and successful answers to the same questions, and prepare you for real interview follow-up questions.

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.

Extract and utilize data through Oracle 18c and become a database expert!

SQL data analysis! We will teach you how to solve practical problems that are applicable in the field, quickly and easily!

Learn common components of global-scale services through popular papers, books, and articles.

You can learn design patterns to implement flexible and scalable object-oriented programming. Learn various patterns that can be used in the real world and apply them to your projects and code refactoring.

This course goes beyond basic CRUD-level database usage, helping you develop the PostgreSQL skills needed in the AI era from a practical, real-world perspective. Drawing on AI development experience in Silicon Valley, you’ll gradually learn how to design and use JSON, indexes, transactions, and pgvector in actual services, while gaining the skills to solve complex data structure and performance problems.

Does game backend development feel daunting and vague? With know-how gained from firsthand experience with numerous projects, I will show you how to perfectly integrate complex Firebase features into actual games. We will connect Firebase to a Unity 6 Watermelon Game to implement online features such as login, cloud database (Firestore) save/load, rankings, bulletin boards, and mailboxes. This is a practical course that also covers security rules, Remote Config operations, and code design based on a layered architecture (UI, logic, and data access).

This course teaches you how to build a practical Unity game with a database. It covers difficult-to-access topics in an easy-to-follow lecture format.

This is a course for learning MS-SQL through baseball and corporate databases.