Things I realized while reflecting over the past 7 years

This is a recorded video of the TDD online live meetup held in July 2025.

The renewal version of Life Coding's first web development course, <WEB 1 - HTML & Internet>, is being released exclusively on Inflearn!

The best introductory programming course that has already been taken and enjoyed by over 20,000 people. This introductory programming course was planned and prepared by Inflearn from the perspective of a non-major, and helps people who have never touched programming before to develop programming skills that can be used in real life.

Learn Figma, the most widely used collaboration tool in the world! Learn the basics of Figma, a design tool for UI design sketching, prototyping, and collaboration, and how to use it in practice.

This course is designed to cover the grammar of multi-threading, multi-processing, parallelism, and concurrency based on OS knowledge in preparation for technical interviews. You will learn basic knowledge about how to increase execution efficiency with multiple resources.

Leverage Python to create your own indicators and a convenient tool for securities analysis!

You can meet Excel as a data analysis tool that can add value to your work. This is a basic Excel course that teaches concepts in a broad and thorough manner from the basics.

In this lecture, we will look at service planning and design methodologies for planning services in the IT/tech field, as well as various soft skills that service planners must have. Finally, we will analyze the service using the example of an AI voice recognition service, a UX service introductory lecture for beginners.

From the basics of the Spring Framework to practical usage! Become a developer who can be deployed and actively engaged in the field right away through thorough and comprehensive explanations and examples.

This is a live video of Jung Heung-soo from Heung Button, which was broadcasted on January 23 as part of the <2025 Know Yourself Know Your Enemy Relay Live Campaign>.

Based on basic Python grammar knowledge, we will gradually increase the difficulty level from easy to difficult examples. During this process, you will learn how to study on your own, acquire solid grammar knowledge, and firmly establish your basics. In addition, we will learn frequently used patterns in Python programming.

This is an introductory web development course for those starting programming for the first time. By learning HTML, CSS, and JavaScript and creating an Instagram post card, you will learn the essential basics required for web page production.

This is a class that teaches intermediate and advanced level data analysis and visualization chart creation methods to those who can handle Excel basics. With this class, you can master Excel completely!

The fact that you can analyze data more easily and effectively with Python Pandas instead of Excel! Learn the basic functions of the Pandas library and how to use it in practice through financial data analysis.

This course is designed to cover Python metaprogramming and in-depth grammar based on extensive Python development experience and online and offline teaching experience. Furthermore, we have prepared a curriculum that will be helpful for Python job seekers' interviews and technical interviews for experienced professionals. In addition, we will explain the process of directly distributing the library you created to PyPI (Python Package Index).

In an environment without a design team, product proposals, or a PM, how can we plan, deliver, and persuade? Kim Young-jun, former 29CM Product Design Lead, will share his self-product strategy focusing on Figma, along with practical case studies. Learn in detail everything from how to survive in a structureless environment to how to build structure with just Figma.

You've applied to be an Inflearn knowledge sharer, but you're feeling overwhelmed by the task of creating a lecture. How about listening to knowledge sharer Kang Young-hwa's lecture creation know-how?

[Inspiration Note] From ways to find inspiration in daily life with author Seunghee, to everything you're curious about regarding Seunghee as a brand marketer!

This is the edited live video from the LLM Application Experience Sharing Session with knowledge sharer Kang Byung-jin :)

How are product design and education changing in the AI era? Figma Official Community, FoF Seoul & Educators jointly hosted a meetup. Discover various cases and topics on AI-era product design and education, along with relevant sessions from global industry speakers who love Figma.

Performance Management Training Solution to Make Leaders 'Speak Through Performance' As the corporate environment rapidly changes due to DT transformation, leaders' perceptions, knowledge, and methodologies regarding performance management must also change. Global leader CEO Jung Tae-hee, the youngest female executive in the IT industry, shares how to gain recognition through performance management, incorporating the latest performance management trends from the most innovative companies.

If you're okay living your whole life doing what others tell you, you don't have to read this book. Please go back.

Karen Floyd is a world-renowned career coach who has designed the careers of leaders at numerous global companies such as Google, Samsung, Naver, and Hanwha. Selected as a top 1% communication expert by the European PR Association and a former headhunter who has handled hundreds of resumes and interviews, she is launching her first course on Inflearn specifically for Korean students. Design your own career strategy and brand using Karen's personally developed C.L.E.A.R. Career Method and LinkedIn branding strategies.

Teacher Runt was a loner with low self-esteem due to childhood obesity since childhood. A loner who couldn't even talk to the opposite sex succeeded in dieting and won awards in competitions as well as body profiles. This is a successful diet without yo-yoing. Teacher Runt will tell you the secrets of success that led to becoming a diet expert for 9 years.

◾ Learn practical strategies for seamless career transitions while employed and career management know-how before and after resignation. ◾ Assess your current career and establish strategies for your next career move. ◾ Set specific job change directions, timing, and establish your next career goals. ◾ Prepare for real-world resume writing, interviews, and negotiations for job transitions.

I want to deeply understand the trials, changes, and history of resistance that Koreans experienced during the Japanese colonial period, from forced annexation to liberation.

Feeling overwhelmed by writing? For those who sigh, unsure where to start when it's time to write, author Kang Won-guk, who honed the President's words and writings for 8 years, shares 'the core of true writing.' From self-introductions, reports, books, to blogs... We share expertise applicable to all your writing needs.

In the previous lectures, we designed the structure and removed the factors that hinder decision-making. Now, only one thing remains: Completing a decision request form that is ready for submission. Many practitioners understand the structure. They even eliminate the noise. However, they freeze the moment they sit in front of their PC. How should the table of contents be arranged? Where should the conclusion be placed? How should the options be organized? What should catch an executive's eye first when they scan the document? This lecture covers that final step. I have observed the difference between "documents that lead to a decision" and "documents that end in mere review" countless times in actual investment review documents, strategy reports, and M&A proposals. The difference was not a grand strategy, but the method of assembly. Even with the same content, the speed of decision-making changes completely depending on how it is arranged. In this lecture, we will cover: - Decision-Ready document structures - Arrangement principles for Zero-Revision - Structures that pass an executive's scan - Conclusion-centered assembly methods all with practical examples. By the end of this lecture, you will not just be completing a simple report, but you will be able to create "A document that requests a decision." A report is not about delivering information; it is a request for a decision. This lecture is the stage where we fit that final puzzle piece.

[Design] Creating a Business Report Structure That Gets Approved Instantly Project 2 goes beyond just understanding why reports fail to get passed; it is a practical course on designing report structures that actually drive decision-making. Many reports contain plenty of information, but they are often put on hold because it isn't clear what exactly needs to be decided. This course covers how to transform a report from a mere "explanatory document" into a strategic design that accelerates your supervisor's decision-making.

We have selected essential topics that must be understood in the flow of economics, structured to be easily and clearly comprehensible together with economics expert Kim Gwang-seok. This enables understanding of the structure connecting from small-scale regional economies to global economic systems, and allows for realistic learning of the essence of the economic field.

This course will cover the methods that enabled a developer from a bootcamp background to achieve hackathon wins, course creation, and junior mentoring within a single year.

We will teach you how to become the No. 1 unrivaled expert leading the era of super-large AI by obtaining a regular degree from a prestigious elementary, middle, and high school in Korea and without having to spend a lot of money studying abroad.

This lecture is an edited version of a YouTube live video conducted with Jasmine to commemorate the release of the course <Attitude Gracefully, Results Clearly: A Former Apple Coach's Practical Negotiation Lecture>.

What does the life you want look like? Time is given fairly to everyone. 24 hours a day, 365 days a year. What matters is how you use that time. How to set life's direction so you can get one step closer to the life you dream of, methods to turn goals into reality. And even the know-how for building systems that maximize limited time to boost work productivity. Drew&Drew will generously share the know-how we've experimented with and organized over the years.

Everything you need to know about successfully planning and executing a presentation that no office worker can avoid!

There are many times when even great products and hard-earned content fail to move people's hearts. In an era where we often lose the essence of marketing while being dragged along by trends and algorithms, Seth Godin asks us: "What change do you want to make?" We invite you to a lecture that revisits the essence of marketing—moving human hearts and actions.

This course is a practical training program designed to secure the core competency of ISO 45001 Occupational Health and Safety Management Systems: 'Internal Auditing.' 1. Requirements Analysis: Key guidelines for each clause of ISO 45001:2018 2. Process Learning: Mastering the entire process from audit planning and execution to result reporting We cultivate internal audit experts who drive the continuous growth of the organization beyond mere certification compliance.

Seth Godin asks us: The project, business, or service you're creating right now— for whom and what value is it creating? Whether it's marketing or planning, ultimately the core of everything we do lies here. Creating value. Through concise yet practical lectures and workbooks, we'll share methods for creating even greater value.

[Strategic Roadmap for System Control and Prevention of Cognitive Atrophy in the AI Era] 1. Introduction: Technical Initiative and Strategic Command (Strategic Command vs. Passive Dependence) A core insight derived from the past 40 years of automotive R&D and corporate management is that entities that lose technical control are highly likely to devolve from beneficiaries of a system into its dependents. In particular, the proliferation of Artificial Intelligence (AI) technology—comparable to high-performance engines—presents a crossroads: it will either leave humans as "passive passengers" of technology or allow them to leap forward as "strategic commanders" who master the system. The indiscriminate dependence on AI observed today is accelerating "Cognitive Offloading," a phenomenon where humans entirely delegate their inherent thinking and analytical mechanisms to machines. This induces the deactivation of the brain's Executive Control Network (ECN) and carries the risk of a structural crisis known as "Cognitive Atrophy," leading to the functional decline of the frontal lobe in the long term. This course aims to present a strategic methodology to strengthen human cognitive capabilities and safeguard intellectual sovereignty in response to this intellectual crisis. 2. Five Core Methodologies for Safeguarding Cognitive Sovereignty ① Maintaining Cognitive Plasticity and Designing Intentional Cognitive Load (Cognitive Gym) The convenience of AI, which provides immediate and seamless answers, can lead to a disconnection in thinking and the omission of critical review processes. To prevent this, it is necessary to design intentional "Cognitive Friction" within work processes. By counter-utilizing AI's automation functions to forcibly delay and deepen the human thinking process, advanced training must be conducted to stimulate neuroplasticity and raise the threshold of thought. ② Establishing an Adversarial Verification System Based on Multi-Agent Systems (MAS) Human cognitive systems are susceptible to "Automation Bias," the tendency to uncritically accept AI outputs. To offset this bias, it is effective to operate a "Critique Agent" or a virtual "Red Team" that analyzes and attacks the vulnerabilities of the logic, separate from the primary model that follows the user's instructions. This forces the process of building defensive logic, thereby activating "System 2 (deliberative thinking)" as defined by Daniel Kahneman. ③ Implementation of Literacy-Based Dual-Track and RQTDW Learning Methods The ability to verify digital tools is directly proportional to one's analog foundational thinking system. While maintaining literacy to deeply grasp the context of text, it is recommended to internalize the 5-step RQTDW roadmap: Read (Deep Reading): Perform a multi-faceted identification of the source of information. Question (Questioning): Pose critical questions regarding logical consistency and the validity of premises. Think (Confronting Contradictions): Analyze and contemplate trade-offs and logical gaps between information. Discuss (In-depth Discussion): Diversify points of contention through virtual or actual discussions. Write (Reconstruction): Refine the results of expanded thinking into human-specific language for systemic internalization. ④ Applying the Sandwich Workflow to Clarify Accountability Delegating the entire work process to AI poses a high risk of cognitive paralysis; therefore, it is essential to establish a rigorous workflow that structurally separates the roles of humans and AI. Context Design Phase (Top Bun): Setting the purpose of the task, imposing constraints, and designing the overall architecture must be performed under human leadership. Data Processing Phase (Meat): Tasks involving repetitive and large-scale resources, such as calculating vast data, sorting, and drafting, are delegated to AI. Final Verification Phase (Bottom Bun): Ethical judgment, precise cross-referencing of facts (Fact-check), and final value attribution are returned to the human domain of responsibility to ensure system stability. ⑤ Hallucination Control and Strengthening Epistemic Boundaries via the SIFT Model AI possesses the attributes of a "stochastic parrot," combining tokens based on probabilistic frequency without a substantive understanding of meaning. Therefore, one must be wary of the "illusion of knowledge" created by AI's fluent output. To this end, a 3-step fact-checking protocol and the SIFT model must be strictly applied in practice. The habit of "Lateral Reading"—tracking original sources and contrasting them with external data—becomes a key mechanism to prevent intellectual free-riding on technical convenience. 3. Conclusion: The Strategic Mission of the Hyper-Intelligent Helmsman While the phenomenon of intelligence is manifested through engineering design, the core agent that controls it in a meaningful direction and creates business value remains rigorous human thinking. This masterclass is designed to ensure that students acquire the capabilities of a "Hyper-Intelligent Helmsman" who controls the powerful power source of AI and designs organizational systems. Strengthen the cognitive muscles of individual members and actively respond to technical challenges. When rigorous engineering control is combined with advanced cognitive abilities, AI will finally function as a strategic asset that drives the sustainable growth of both members and the organization.