Java, Spring, MySQL....

I've learned all of this, so why do my resumes keep getting rejected?

As a backend developer, you haven't been able to include core technologies like DB indexing, transactions, server optimization, and Redis in your resume
through problem-solving experience.

So then, can you confidently answer the questions below?

❓ DB Indexing: How did you shorten slow queries, and can you show the results with numbers?

❓Transaction: How did you resolve concurrency issues or bottleneck problems?

❓Server Optimization: What is the specific process for achieving high performance with minimal resources?

❓Redis: Do you have experience dramatically improving processing speed by utilizing cache?

If you cannot provide clear answers to these four questions,

In just 6 weeks through lectures, build real problem-solving experience and
learn how to properly incorporate that process into your resume.

Even before entering the interview room,
only applicants who have sufficiently answered in their resume can pass document screening and succeed in interviews.
Now, become a competitive backend developer who clearly demonstrates "Problem → Solution → Result"!

Real reviews from those who took the course and passed

2025/05/24 Document Screening Passed Mr./Ms. **

2025/07/31 Final acceptance at 3 companies, Mr./Ms. O**

Actual students' performance improvement results (September 28, 2025)

✅ You'll learn this content.

178 days of development, 946 pages of materials, total of 12,665 lines of code.

I have analyzed hundreds of successful resumes so far.
Those resumes clearly had common characteristics.
Specifically, they contained concrete experiences of solving problems, and proved the results with numbers.
But the phrase 'quantify it' feels abstract and hard to grasp, doesn't it? I felt the same way.

So I organized it specifically and created it as a course.
I developed it for a total of 178 days, with a 946-page textbook, 32 hours of original footage, and 12,665 lines of code.
I systematically structured the content to save your time and enable the most efficient learning possible.
I went through two rounds of thorough review to create this fully subtitled course video.
You can get all of this in just under 20 hours.

This course is not just simple theory. Problem identification → Solution experience → Documentation through metrics - it's structured to help you apply these concepts to your projects and create a truly competitive resume.
We'll transform your resume from a simple introduction into a competitive weapon.

✨ Features of This Course

📌 For Beginners

The first student of this course was a non-CS major bootcamp graduate developer.
Therefore, every concept explained starts with "why do we need to learn this".

• Docker, AWS, Redis

• Isolation Level, MVCC, Query Plan, Deadlock, Phantom Read, Gap Lock

• Transaction Propagation, Thread Pool, Cache Avalanche …

I explain these concepts using analogies, practical code, and test code so that "even people hearing about them for the first time" can understand.
Rather than simple term definitions, I explain why these technologies emerged to solve problems.

Check out Developer Job RPG

📌 Organizing the "quantified experience" from start to finish as a template

"Quantify your resume!"
You've heard this advice a lot, but most people don't actually know how to implement it.

So in this lecture,

A. Problem Situation → B. Solution Method → C. Improvement Metrics

I created this flow so that you can repeatedly learn it in template form.

You can learn persuasive sentence structures based on data in this course.

Real resume problem-solving cases explained in the lectures

📌 I structured it so that the question "So what should I do?" doesn't remain unanswered.

Lectures that just throw concepts at you and end there,
lectures where you can't even figure out how they connect to real work…
I hated those kinds of lectures the most.

This course connects concepts → problem situations → practical application.
Rather than simple explanations,
it helps you understand "to the extent that you can explain this to someone else and how".

심지어, 실제 [[STRONG_1]]메이저 기업[[/STRONG_1]](네카라쿠배당토 중 하나)의[[BR]][[STRONG_2]]기술 면접[[/STRONG_2]] 강의에서 나온 질문 [[STRONG_3]]80%를 이 강의 하나로[[/STRONG_3]] 커버가 가능했습니다.[[BR]][[STRONG_4]]실제 기업들이[[/STRONG_4]] 문제 해결 사례를 본다는 것의 증거입니다.

📌 I've taken care of all the minor settings for you

• Complex AWS Configuration

• Repetitive code base

• Deployment Environment Setup

  
  

I've already done all the tedious work for you.
Just take the insights with you.

📌 Mission and feedback are all ready

Each week, there will be missions to directly apply to your projects.

This course doesn't stop at simply learning theoretical concepts,
but is designed to develop practical skills by actually applying them to your own projects.

Also, regarding the missions you submit,
I will personally review the results and provide you with specific feedback.

We've thoroughly prepared a curriculum so that you can apply the concepts you've learned to real projects and develop practical skills
as well.

You will have not just a lecture that you simply listen to,
but an experience of directly applying, receiving feedback, and growing.

->

The mission and feedback features have been changed to be provided in challenge courses (updated as of August 26, 2025)
For those who previously enrolled, we will provide a method to transfer to challenge courses, so please take note

I recommend this for people like this

🥳🥳🥳 Real Student Reviews 🥳🥳🥳

Developer Job RPG Student Hyeonwoo's Course Review

⛔ ️Caution 1: Taking this course does not guarantee 100% employment

Just because you take this course doesn't mean you'll definitely get accepted into NAVER, Kakao, LINE, Coupang, or Baemin.
The problem-solving examples I've prepared will also be seen by many students over time,
and to that extent, it may become difficult to differentiate yourself by simply using the examples as they are.

So I will not make exaggerated promises like "anyone can definitely pass."

However, there are things you can definitely take away from this course.

Exactly, it's the ability to discover problem situations on your own and organize those solution experiences in a compelling way.
This course is not a passive lecture that simply injects specific keywords.
It focuses on the process of creating a resume that proves you are 'a developer who knows how to solve problems'.

Through this course, I hope you will become developers who think independently and grow continuously.

⛔ Note 2: This course does not cover all technologies

This course is not an encyclopedia-style lecture that explains every technology from A to Z.
It focuses on accurately understanding the core concepts needed for problem-solving,
and how to apply them in real domain situations.

For example, it doesn't explain all the features of AWS. It also doesn't cover Docker from start to finish.

However, the core topics of this course
DB indexes / transactions / server optimization / Redis
are covered in depth sufficient to prepare for interview questions.

In other words, this course is a practical-focused course where you can solve problems encountered in real projects
and incorporate that experience into your resume.
If you need deeper technical exploration, you should expand and study separately afterward.
I will only accompany you to that starting point.

⛔ Caution 3: This course is not cheap.

The cost of the course is not insignificant. I recognize that this can be a considerable burden for job seekers.
That's why I've included the content with a sense of responsibility.
I've thought long and hard about what content is most necessary for backend developers at this point in time.
Based on successful resumes and actual questions from technical interviews, I've considered how to create a convincing resume.

Reduce the trial and error that could take months on your own,
and ensure you can set a clear direction with just one investment.

This course is a guide based on 'passing experience' rather than knowledge, and
it's a practical course designed to help you actually revise your resume and prepare for interviews.

I would appreciate it if you think of this not as
'simply listening to lectures' but as
'the cost of properly designing your career.'
I have prepared comprehensive content to meet those expectations.

🎁 EVENT 1 🎁

There are special benefits provided only to those who take the course.

Actual technical interview questions that were asked at major companies have been compiled.

You can think of this as a special problem book prepared by those who passed the resume screening to prepare for technical interviews.
This problem book will be continuously updated, so you'll be able to prepare for interviews in line with current trends!!

(This problem set is provided as a link in Notion format!)

We will give this problem book to the first 200 people who write course reviews!

Get it after verifying your course review in the community!

(The authentication method is written in the very last lecture __)

That's not all

Developer Job Preparation Guide (Resume, Portfolio, etc.) included!

🎁 EVENT 2 🎁

After taking the course, the first 10 people who pass the document screening should share their course reviews + document screening success stories in the open chat room!

We are sending Starbucks gift cards as a token of our appreciation

🎁 EVENT 3 🎁

Please submit the Google form through that link

🎟 We'll provide you with a discount coupon 🎟

🎁 EVENT 4 🎁

Each sincere review provides great motivation and help to other students.

After writing a course review on your blog, please submit it through this link and we'll give you a 30,000 won Coupang Eats gift card!

(However, the completion rate must be 80% or higher)

🎁 EVENT 5 🎁

IntelliJ IDE 3-month free license provided!

To support your development studies, we have prepared special benefits through collaboration with JetBrains.
You can use IntelliJ for free for 3 months with the promotion code below!

✅ Promotion Code: HYUNJOONPARKxJB
✅ Benefit Details: JetBrains Single IDE (e.g., IntelliJ, PyCharm, WebStorm, etc.) 3-month free license
✅ Expiration Date: Until May 13, 2026
✅ How to Use😀

1. Access the official JetBrains coupon registration page

2. Select your desired IDE after entering the code

3. Check the license issued via email

⚠ Caution:
This code can only be used by new users who are using JetBrains for the first time.
(Only those who have never used a JetBrains paid license before can register)
(You can do it infinitely by creating a new Google email)

2025.05.01 Update

Guide for Docker Image Corruption Cases feat. Anfield

2025.05.05 Update

Why is our db in a public subnet? Adding section feat. Hi

2025.05.11 Update

JMH plugin installation instructions added feat. kongminoo

2025.06.02 Update

Added explanation of index data flow feat. Mogging

2025.06.07 Update

Explanation of criteria for determining driving table and driven table in execution plans feat. cho766

The person who created this course

Dingcodingco (Main Instructor)

• 2021 ~ 2022: S Coding Club Algorithm (data-structure) Tutor

• 2022 ~ : Operating coding YouTube channel DingCodingCo (featuring various content related to developer job hunting)

• 2022 ~ 2023 : Viva Republica Server Developer

  
  

• Never give up on students 🦈

• Developer Job Success Community Management and Offline Meetup Operations

  
  

  • ✅ Join KakaoTalk chat room: https://open.kakao.com/o/gPI6kTUg

    
    

  • ✅ Join Discord: https://discord.gg/X74q5Yw3Sv

    
    

Dungka (Teaching Assistant)

• NAVER, Kakao, LINE, Coupang, Baedal Minjok, Danggeun Market, Toss developer

  
  

Pre-enrollment Reference Information

If!! you have even the slightest hesitation before enrolling in the course.

Am I taking the right course right now?? If you're wondering about this, feel free to reach out anytime through our open chat room!!

😍 I'll do my best to answer diligently 😍