A Portfolio Guide from a CTO Who Has Reviewed 10,000 Applicants

This is a practical resume writing strategy lecture shared directly by a Technical Director who has reviewed over 10,000 resumes. There is no such thing as a "guaranteed pass template" or a "must-pass formula" in this world. I will show you the perspective of a document reviewer—how they read resumes, what they focus on, and what makes them feel fatigued. A resume is not a subject for memorization. The core of this lecture is understanding the process itself of properly organizing and expressing who you are. Whether you are an experienced professional or a newcomer, this lecture will be helpful for any developer who has ever struggled with their resume.

This is a practical technical interview strategy lecture shared directly by a Technical Director who has conducted over N,000 technical interviews. There is no such thing as a "guaranteed way to pass" or a "guaranteed formula for success" in this world. I will show you the interviewer's perspective—how they perceive a resume during the preparation stage, and what they focus on and prioritize during the interview process. A technical interview is not a memorization subject with fixed answers. The core of this lecture is understanding the essence of the process itself: showing your true self to the interviewer and persuading them. Whether you are an experienced professional or a newcomer, this lecture will be helpful for any developer who has ever worried about technical interviews.

This course focuses on building the real skills needed in actual development work. The goal is not simply to learn how to write code well, but to experience how to work well as a developer. The examples are based on the commerce domain, covering cases frequently encountered in real-world work environments, and are provided in SpringBoot & Kotlin. However, it's a course where anyone can contemplate and experience real-world development through thought-provoking content, without being dependent on any specific language or framework. Based on the practical perspective of a senior developer and former director at Toss Payments who led a large-scale payment service organization, the course is designed to help you learn the thought processes and design decisions used in actual work environments.

Messy code, a flood of requirements... If you're looking for a breakthrough with AI, Learn how to become a "high-performing developer" by leveraging AI in legacy environments, taught by the former VP of Engineering at Toss Payments. Legacy code isn't going anywhere, even in the age of AI. It’s no exaggeration to say that every company has legacy code, unless they were founded today. So, how should we utilize AI in this reality? In this course, the former VP of Engineering at Toss Payments, who led a large-scale payment service organization, demonstrates firsthand how to work effectively using AI in legacy environments. This isn't just a course about how to use AI or basic coding skills. The goal is to help you develop your "critical thinking" as a developer and truly understand what it means to work effectively.

"In the AI era, so what should developers do?" To this question, former Toss Payments Technical Director Jaemin Kim and Inflab CTO Hyangro provide the answers. Beyond flashy technology, discover the most realistic answers on 'how to grow solidly in a given environment'!

Because you never know when or how software will grow, you always need to be prepared to continue growing. This provides one direction for that.

This is a practical resume writing strategy lecture shared directly by a Technical Director who has reviewed over 10,000 resumes. There is no such thing as a "guaranteed pass template" or a "must-pass formula" in this world. I will show you the perspective of a document reviewer—how they read resumes, what they focus on, and what makes them feel fatigued. A resume is not a subject for memorization. The core of this lecture is understanding the process itself of properly organizing and expressing who you are. Whether you are an experienced professional or a newcomer, this lecture will be helpful for any developer who has ever struggled with their resume.

This is a practical technical interview strategy lecture shared directly by a Technical Director who has conducted over N,000 technical interviews. There is no such thing as a "guaranteed way to pass" or a "guaranteed formula for success" in this world. I will show you the interviewer's perspective—how they perceive a resume during the preparation stage, and what they focus on and prioritize during the interview process. A technical interview is not a memorization subject with fixed answers. The core of this lecture is understanding the essence of the process itself: showing your true self to the interviewer and persuading them. Whether you are an experienced professional or a newcomer, this lecture will be helpful for any developer who has ever worried about technical interviews.

UX/UI Design Basic Theory + Practice UX/UI Design Career Employment Strategy

Developers, can you really succeed just by developing your development skills? Build your own brand that differentiates you from the crowd of developers along with your development skills, add soft skills, and be active in the development ecosystem.

If you are preparing for a job change after 5 years or less, we will tell you all about career management methods along with successful cases of career branding that can increase your passing rate by more than 2 times with a strategy that differentiates you from others!

Listening to the interview speech can help you pass the interview with flying colors.

This course was created to solve a common problem many people face while preparing for developer jobs: "I studied CS and data structures, but I get tongue-tied during interviews." While conducting actual interviews at companies like Naver, Kakao, and Toss, I noticed that most candidates have memorized concepts but cannot explain why those concepts are necessary or how they are applied in real-world situations. Rather than simple rote memorization, this course teaches you how to understand the interviewer's intent and provide more persuasive answers to the same questions. Whether it's the OSI 7 layers, data structures, or coding tests, we focus on why you need to know them, when they are used, and how to speak about them to receive a positive evaluation in an interview. This course is for those who want to become developers who can explain what they understand in their own words, rather than just giving the same answers as everyone else.

Do you feel overwhelmed just thinking about the moment of persuasion? Stop relying on emotions and intuition for negotiations! With former Apple business coach Jasmine Han, you can take control of negotiations in just 15 minutes a day for one month.

"2026 UIUX Designer | Coding Designer Agency Pass Portfolio Reveal" This is a practical lecture on creating a UIUX web portfolio that catches the interviewer's eye. The curriculum is designed not just for simple portfolio creation, but to enhance your competitiveness as a UIUX designer with differentiated results utilizing interactions.

A course where you can understand core data structure concepts and train to explain them verbally for interviews.

We've collected designer portfolio materials, videos, and frequently asked questions related to portfolios that Movie Nim and Kiki Nim previously released for free.

A blog of your own that everyone dreams of! Not just another common blog you see everywhere, but a differentiated blog that you create and manage yourself! Try it now with a Github blog!

Learn how to transform rough notes written on-site into blog posts with ChatGPT, and complete the process through AI image generation and Shorts production. Even without writing experience, you can master the entire blog management process through step-by-step hands-on practice. This is a practical course for business owners who want to run their blogs themselves without relying on agencies.

Stop paying for student record design. I will reveal all the consulting secrets used directly by an admissions consultant with 30 years of experience.

This is a [Backend, Resume Enhancement] class prepared for job seekers and junior developers.

[2026 Latest Edition] Discover everything from essential practical skills for junior content marketers with no experience to job-seeking know-how!

This is a lecture for those who want to consistently write a technical blog. Starting is easy, but trying to do it consistently leads to many trials and errors. This lecture compiles what I've tried and the know-how gained from operating a technical blog for over 7 years. It contains all my 7 years of experience, including SEO, technical blog writing strategies, writing process, etc.

Notion is a growing tool that is still evolving and filling in its gaps. I've summarized the core essentials, from basic usage to key precautions when sharing documents. Just stick with it for one week. Your life before 😵‍💫 and after 😎 the lecture will be completely different!

This course provides step-by-step instruction on the web planning procedures for large-scale projects, covering everything from A to Z—including RFP analysis, interface definition, integrated design, test execution, and stabilization—which are essential competencies for web planners in SI and next-generation projects.