Just 60 minutes! Python Core Concepts Super-Compressed Lecture - Focus on Understanding Over Theory

A 75-minute session for those who have built REST APIs with Spring but are unfamiliar with AWS serverless. We’ll clarify what Lambda, SQS, DLQ, S3, and DynamoDB each are and aren’t responsible for, and directly observe how messages are redelivered and isolated in a DLQ. Hands-on exercises are conducted locally without an AWS account.

No coding skills? No problem! Turn your ideas into real profit in just 4 weeks. Use AI and the latest tools to build a website and an app simultaneously and launch your service right away.

Step-by-step explanations that even beginners can easily understand make coding tests that once seemed daunting clear and approachable. Learn only what you need and apply it to real problems right away!

AI is no longer a choice, but a matter of survival. Shorten development tasks that used to take 3 days down to 30 minutes; leave repetitive tasks to AI and focus on solving more important problems. Through AI-native development methods that are practical rather than theoretical, we will show you the definitive way to be recognized as an "AI-savvy developer" at your company.

"I have a backend technical interview in a week—where should I start?" The secret to answers that make interviewers nod in approval. Fully master the actual answer patterns of successful candidates from Naver, Kakao, Coupang, and Toss in just 3 days!

You’ve written SQL with JdbcTemplate before, right? I’m sure everyone has experienced the frustration of having to modify both the SQL and the RowMapper every time a single column changes. This course begins with that pain. A single SELECT using plain JDBC takes 35 lines. You open a Connection, create a PreparedStatement, iterate through the ResultSet, and if you forget even one close(), the server goes down. After typing through this hell yourself, encountering JPA’s one-line save() makes you feel, not just understand, “This is why people use JPA.”

We live in an era where AI can generate 10 files at once. However, if you can't track where the code changed, if it conflicts with your teammates' work, or if you don't know how to revert it—your productivity will suffer no matter how well you use AI. This course isn't just a list of commands like git add and git commit. It provides a visual understanding of the principles behind safely managing AI-generated code and merging it with your team's work. In just two hours, you will transform into a developer who can freely track, revert, and merge any code, whether it was created by AI or written by yourself.

Beyond using AI just for copy-and-paste tasks, learn how to connect Claude Chat, Cowork, MCP, n8n, Supabase, and Vercel to actually automate repetitive work for non-developer office workers. Set in a fictional company called DingcoLabs, this course walks you through hands-on PM, marketing, sales, customer service, and HR scenarios to build a workflow automation system you can put to use at your company right away.

In a world where every résumé looks similar, “differentiation” gets you hired. Over six weeks, learn four practical résumé strategies directly from a backend professional.

This is an introductory backend development course where you learn through understanding rather than memorization, and through experience rather than theory. Instead of memorizing and reciting a Googled definition in response to the interview question, "What is JPA?", this course helps you give an experience-based answer that begins with, "I've been through JdbcTemplate hell..." You’ll personally experience the process of reducing 30 lines of pure Java ServerSocket code to just 7 lines with Spring Boot, gaining an intuitive understanding of "why we use frameworks." After six lessons, you’ll have a working portfolio project in your hands: a Todo List REST API implemented with Spring Boot + JPA.

If you ask an AI to "get the top 10 sales," it will whip up a plausible-looking query in no time. However, to determine if that query is actually correct, if the results of joining three tables are accurate, or if it's performing a full scan on 500,000 records without an index—you ultimately need a foundation in DB basics. This course doesn't cover anything overly difficult. In just 2 hours, you will learn the entire flow of SQL by coding along, covering exactly what you need to know before giving instructions to an AI. By the end of this lecture, you will no longer feel uneasy when faced with a query generated by AI.