Infralab Tech Blog

This course is designed to use only personal PCs and laptops. You can directly implement CI/CD automation processes by applying GitOps methodology in a k8s environment without using cost-incurring cloud environments like AWS or GCP.

It covers the essential core of computer science that remains unchanged in the AI era. You can prepare for system design interviews for employment or career transitions.

This is a hands-on introductory course where you can learn everything from Kafka installation to Producer/Consumer message transmission by following along with Spring Boot. Rather than focusing on complex theories, you will quickly understand the basic flow of Kafka—how messages are published and subscribed to through Topics—by writing and executing actual code yourself. It is suitable for beginner and junior backend developers who are integrating Kafka for the first time.

Good frontend developers create components. Great frontend developers design systems.

Talking about ‘Developer, Things That Helped Me Grow’ _Seo Ji-yeon AI Engineer _Kim Young-jae Technical Fellow _Ha Jae-seung Senior Developer _Jo Eun Lead Developer _Kim Sang-woo Data Group Headquarters Manager _Gom Coach Agile Coach

This course is a hands-on program focused on learning the core syntax and application methods of frontend web programming and applying them to actual portfolio creation. Learners will progressively master everything from basic syntax including HTML, CSS, and JavaScript to the latest frontend technologies, directly experiencing the process of web interface implementation and dynamic functionality handling. Additionally, through various examples frequently used in practice, learners can naturally acquire efficient coding techniques and real development workflows. Through this course, learners will move beyond simple syntax memorization to understand the connected workflow from web page planning–design–implementation, and based on this understanding, they can complete their own portfolio. Furthermore, this course will serve as a solid stepping stone for growing into a frontend developer, providing great help as an introductory course for learners new to web development and as a practical supplementary course for those looking to build hands-on experience.

A Redis course created with a current Kakao interviewer. From hands-on practice with data structures ranging from String to Sorted Set to Sentinel and cluster configuration, you’ll build design rationale that holds up in interviews and real-world work.

Are you feeling anxious because you've only been following along and copying code? We’ve packed this with the core principles of how the web works and the criteria for choosing technologies, without just focusing on implementation. From foundational concepts to React 19 and Vite 7, we will help you draw the big picture for frontend development in 2026!

Beyond the basics of API design, CRUD implementation, and JWT authentication, all the way to backend architecture design! This is an introductory system design course to help you create 'your own backend architecture' so you can confidently discuss design experience in interviews.

If you feel lost about what to learn in an era where AI writes code, you can find clear answers in the principles of UNIX and the kernel—the unchanging essence of systems. Through a practical project that integrates Node.js with a C language engine (FFmpeg), this course delivers the perspective of the top 1% of architects who command entire systems without being swayed by technology trends.

This course is a full-stack level frontend project course that focuses on implementing Notion from start to finish using Vanilla JavaScript, going beyond simple UI cloning to deeply understand the internal operating principles. You'll implement all the core features of a real note-taking app using vanilla JS, including sidebar tree, nested document creation, auto-save, routing, trash, favorites, search modal, settings modal, theme switching, Export/Import, keyboard shortcuts, responsive layout, drag resize, and more. The goal is to solidly learn browser standard behaviors (event bubbling, DOM tree, local storage, Blob, FileReader, hash routing, etc.) that you must know before frameworks like React and Vue, so you can completely understand "why it works this way" and build the skills to debug effectively.

API, framework, Git... We've collected difficult-to-understand development terms and explained them in an easy-to-understand way with examples!

This course covers RPC communication techniques for maximizing performance in large-scale MSA (Microservice Architecture) environments. Going beyond simple gRPC practice, you will learn how to implement stable and efficient service-to-service communication in real-world production environments where hundreds of microservices operate simultaneously. Based on Golang, the course takes a practical, hands-on approach to writing Protocol Buffers (proto) syntax, generating code automatically and implementing services, understanding gRPC’s architecture and advantages over traditional RPC, and applying performance optimization strategies. To ensure that even non-majors and beginners in server development can easily follow along, it explains everything step by step—from the concept of RPC to gRPC’s internal operating principles—helping you develop practical skills that can be applied directly to real-world services.

Systematically learn over 60 IT terms encountered in practice, ranging from job postings to meeting minutes and incident reports. Understand service structures by dividing them into four layers, and acquire the essential vocabulary needed for collaborating with development teams and attending technical lectures.

Have you learned JavaScript but find yourself stuck when it comes to actual projects? I created this course for those who can use forEach but hesitate to use reduce, find asynchronous code a headache every time they see it, and build components without knowing the underlying reasons for their structure. This course doesn't just explain syntax. It focuses on "why we use it this way" to help you develop the coding intuition needed to jump straight into real-world work.

In an era where AI writes code for us, the value of a "true architect" who can see through and control the macroscopic framework of a system becomes overwhelmingly higher. This course digs into the essence of low-level networks and TCP/UDP sockets hidden behind frameworks, cultivating the ability to design robust core engines that never crash even in the face of millions of traffic hits and large-scale data. Go beyond being a coder who blindly repeats copy-pasting, and leap forward to become an irreplaceable master who directs and controls AI with clear, system-level solutions.

We will delve deep into the 'Stream Architecture,' which controls massive 10GB datasets with just 50MB of memory, to grasp the essence of physical resource management. Based on this, you will design data pipelines that directly control the Operating System (OS) and the V8 engine, evolving into a top 1% high-end engineer that AI can never replace.

This course is designed for those with absolutely no programming experience, helping you learn Python, a popular programming language, from scratch. Python is one of the most suitable languages for beginners to learn due to its simple syntax and readability. It is used in various fields such as web development, data analysis, artificial intelligence, machine learning, and task automation, and is a very promising technology for the future. In this course, you can systematically learn Python's basic concepts through practice, including variables, data types, conditional statements, loops, functions, lists, dictionaries, and more. Furthermore, you can also learn practical skills by directly building actual applications or tools. We provide friendly and easy-to-understand explanations, along with abundant examples and practice problems, so that even those with fear of programming can easily follow along. By writing and testing code yourself, you can naturally increase your understanding and continue learning without getting tired. Upon completing this course, you will be able to write simple programs yourself and gain confidence in solving various problems using Python. Now is the perfect time to start Python as your first step towards career advancement or change.

You don't need to know any coding at all. In just half a day of studying VIBE Coding, you'll be able to create programs without writing any code. Let's learn the latest AI coding methods by directly creating 10 step-by-step examples such as web scraping, TTS, chatbots, and games.

DevOps Interview Preparation: Master your interview preparation for Cloud, CI/CD, Infrastructure as Code, Monitoring, Linux, Docker, and Kubernetes.