[백엔드/예외처리 시나리오/집계 최적화] 백엔드 포트폴리오와 실무 이력 강화 전략. 올인원 PART1

I will share all the trials, errors, and know-how I experienced on my journey from being a manufacturing web developer to becoming a back-end developer at a commerce/K company portal service company. Don't you all go through the same trials and errors!

Let's improve performance by utilizing the basic technology stack! After the improvement, we will check the changes through load testing and monitoring tools! We will also prepare for interviews on each topic!

I will share all the trials, errors, and know-how I experienced on my journey from being a manufacturing web developer to becoming a back-end developer at a commerce/K company portal service company. Don't you all go through the same trials and errors!

I am covering the know-how on how I studied and got a job, starting as a non-major.

A Non-major Developer's 5-Year Journey: A Guide to Reducing Time and Trial and Error

Analysis of CS major interview questions [Operating system/data structure/algorithm/database/network]!

What does a portfolio that demonstrates problem-solving skills look like? Are you curious about ideas for creating a portfolio easily and quickly without much effort? You can learn more through real-life examples such as Younghwa's portfolio and student case studies.

This course carefully selects only the essential Java core concepts you must know for practical work and interviews, covering everything from object-oriented programming to collections, multithreading, and modern Java all in one comprehensive guide. Beyond basic syntax, we explain advanced concepts that make the difference in interviews through diagrams and examples in an easy-to-understand way, organized with slides for quick review at a glance. If you want to systematically organize Java core concepts, start right now.

A C++ course optimized for employment that prepares you for both practical work and interviews simultaneously. An AAA game developer helps ensure your employment with interview questions from major domestic game companies and practical cases collected over 10 years.

From documents to interviews, the A-Z of designer employment is included. We will show you in detail how to increase your chances of passing by watching the interview process of an actual applicant that you cannot see anywhere else.

We will inform you of a career expansion roadmap to grow as a web planner in Korea and reach the top as a next-generation SI web planning PL.

This is an introductory course that organizes the most frequently appearing database concepts in interviews and practical work with a flow-centered + diagram-centered approach. From basic SQL syntax to normalization, transactions, indexes, sharding/partitioning, and security, it structurally connects and explains complex DB concepts with real examples. At the end, an interview practice chapter is included, so you can confidently answer questions like "What is a transaction?" and "When do you use indexes?"

* In-house Service Planner & Product Manager Introduction Course * A course where you can build your portfolio while taking classes

This course is a practical-focused learning program for JWT-based token authentication and security enhancement techniques that are essential in modern web service environments. Using Spring Boot 3, Spring Security 6, and React, you'll implement secure login systems and cover comprehensive security practices including XSS·CSRF countermeasures, HTTPS implementation, token reissuance and revocation strategies, and secure secret key management. Additionally, you'll practice real service-level environment configuration through AWS build·deployment and performance optimization using Redis, and the complete project source code provided in the course can be directly applied to real-world work.

Master Algorithm Problem Solving with 100 Essential Silver Level Problems from Baekjoon Online Judge

Complete a project integrating an API server built with Spring Boot (Spring Boot ver3.4.x) and React 19 (with TypeScript)! Apply frontend to your backend portfolio! This course is written for working professionals (not a beginner-level course).

This course provides an in-depth study of multithreading and concurrency, from basic principles to practical applications.

This course proceeds in stages, similar to the actual work, by learning and applying the necessary knowledge while configuring the infrastructure.

DevOps Interview Preparation: Master your interview preparation for Git, Docker, CI/CD, Terraform, Ansible, Kubernetes, and Monitoring.

Building a 3D Globe Article Service with ThreeJS and SpringAI Create your own 3D globe article service using your personal chatbot and ThreeJS!

Springboot + React RestAPI Bulletin Board Creation: Learn Faster Than Anyone Develop a CRUD server with Springboot and create your own board with React!

We'll tell you what to do and what not to do when you have to give a technical/business presentation.