Java, Spring, MySQL....

I've learned all of this, so why does my resume keep getting rejected?

It's because I couldn't include core technologies like DB indexing, transactions, server optimization, and Redis in my resume
through problem-solving experiences as a backend developer.

So, can you confidently answer the questions below?

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

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

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

❓Redis: Have you ever dramatically improved processing speed by utilizing cache?

If you can't clearly answer these four questions,

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

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

Collection of Real Reviews from Those Who Passed After Taking the Course

2025/05/24 Document Screening Passed Jeong**

2025/07/31 Final acceptance from 3 companies - Mr./Ms. Oh xx

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

✅ Here's what you'll learn.

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

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 in detail and created it as a course.
I developed it for a total of 178 days, the textbook is 946 pages, the original footage is 32 hours, and the code is 12,665 lines.
I structured the content systematically to save your time and enable the most efficient learning possible.
I turned this result into a fully subtitled video course through two rounds of thorough review.
You can get all of this in just 20 hours.

This course is not just theory. From problem discovery → solution experience → quantification into achievements, it's structured to help you apply it to your projects and create a truly competitive resume.
I will 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 we need to learn this".

• Docker, AWS, Redis

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

• Transaction Propagation, Thread Pool, Cache Avalanche …

Even "those hearing about this concept for the first time" can understand it
through explanations based on analogies, practical code, and test code.
Rather than just defining terms, we explain why this technology emerged to solve problems.

Check out the Developer Job RPG

📌 Organizing "Quantified Experience" from Start to Finish with Templates

"Quantify your resume!"
You've heard this advice many times, but most people don't know how to actually apply it.

So in this course

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

I made this flow into a template format for repeated learning.

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

Real-world resume problem-solving cases explained in the course

📌 I structured it to avoid leaving the question "So what should I do about it?"

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.
It's not just simple explanations,
but helps you understand "to the point where you can explain this to someone else".

In fact, 80% of the questions from a technical interview course at an actual major company (one of the top tech companies in Korea)
could be covered with just this one course.
This is proof that real companies look at problem-solving case studies.

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

• Complex AWS Configuration

• Repetitive code base

• Deployment Environment Setup

  
  

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

📌 Mission and Feedback, Everything is Ready

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

This course goes beyond simply learning theoretical concepts,
it is a course designed to develop practical skills by actually applying them to your own projects.

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

You'll learn concepts and apply them to real projects while developing practical skills
through a thoroughly prepared curriculum.

You will gain not just a lecture to passively listen to,
but an experience of direct application, receiving feedback, and growing.

I'm ready to

This mission and feedback feature has been changed to be provided in the challenge course (updated as of August 26, 2025)
For those who enrolled previously, we will provide a way to transfer to the challenge course, so please keep this in mind

We recommend this for:

🥳🥳🥳 Real Student Reviews 🥳🥳🥳

Developer Job RPG Student Hyunwoo's Course Review

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

I cannot guarantee that taking this course will automatically get you into top tech companies.
The problem-solving examples I've prepared will be seen by more and more students over time,
and simply borrowing these examples may not be enough to differentiate yourself.

So I won't make exaggerated promises like "everyone will definitely pass."

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

Specifically, it's the ability to discover problem situations yourself and organize your problem-solving experience in a convincing way.
This course is not a passive lecture that merely 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 grow into a developer who thinks independently and continues to grow.

⛔ 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 doesn't cover Docker from start to finish either.

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

In other words, this course is a practice-oriented course that solves problems encountered in real projects,
and allows you to incorporate that experience into your resume.
If you need deeper technical exploration, you should expand and study separately afterwards.
I will only accompany you to that starting point.

⛔ Warning 3: This course is not cheap.

The cost of this course is not insignificant. I recognize that this is a price that can be quite burdensome for job seekers.
That's why I've prepared the content with a sense of responsibility.
I've deliberated extensively on what content is most necessary for backend developers at this point in time.
I've thought carefully about how to create a convincing resume based on successful resumes and actual technical interview questions.

Reduce the trial and error that could take months on your own,
and establish a clear direction with a single investment.

This course is a guide based on 'acceptance experience' rather than just 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 could think of this not as 'simply taking a course'
but as 'the cost of properly designing your career.'
I have prepared everything to meet those expectations.

🎁 EVENT 1 🎁

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

Collected technical interview questions that were actually asked at major companies.

You can think of this as a special problem set prepared for those who passed the resume screening to prepare for technical interviews.
This problem set 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 a course review!

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 completing 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!

As a token of appreciation, we are sending Starbucks gift cards

🎁 EVENT 3 🎁

Please submit the Google form through this link

🎟 I'll give you a discount coupon 🎟

🎁 EVENT 4 🎁

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

After writing a lecture review on your blog and submitting it through this link, we'll give you a 30,000 won Coupang Eats gift certificate!

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

🎁 EVENT 5 🎁

IntelliJ IDE 3-month free license provided!

To support your development studies, we've prepared special benefits through our collaboration with JetBrains.
With the promotion code below, you can use IntelliJ for free for 3 months!

✅ Promotion Code: HYUNJOONPARKxJB
✅ Benefits: 3-month free license for a single JetBrains IDE (e.g., IntelliJ, PyCharm, WebStorm, etc.)
✅ Valid Until: May 13, 2026
✅ How to Use😀

1. Access the official JetBrains coupon registration page

2. Select your preferred IDE after entering the code

3. Check the license issued via email

⚠ Warning:
This code is only available for 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 this infinitely by creating a new Google email)

2025.05.01 Update

Guide for Handling Broken Docker Images feat. Anfield

2025.05.05 Update

Why is our database in a public subnet? Section added feat. Hi

2025.05.11 Update

Add JMH plugin installation instructions feat. kongminoo

2025.06.02 Update

Index data flow explanation added feat. Mogging

2025.06.07 Update

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

2025.12.11 Update

2-7 Spring Environment Configuration Q&A Content Added feat. Chunsik

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 Hunting Community Management and Offline Meetup Organization

  
  

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

    
    

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

    
    

Doongka (Teaching Assistant)

• NAVER-KAKAO-LINE-COUPANG-BAEMIN-DANGGEUN-TOSS Developer

  
  

Notes Before Enrollment

If!! you have any hesitation before enrolling in the course.

Is this the right course for me 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! 😍