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3-Day Backend Interview Core Compression Strategy Guide [NAVER, Kakao, LINE, Coupang, Baedal Minjok, Danggeun Market, Toss]

"I have a backend technical interview in a week, what should I start with?" The secret to answers that make interviewers nod in approval Master the actual answer patterns of Naver, Kakao, Coupang, and Toss successful candidates in just 3 days!

33 learners are taking this course

  • dingcodingco
면접준비
기술면접
백엔드
java
스프링
Spring
oop
DBMS/RDBMS
cache
index

What you will gain after the course

  • Practical Methods for Quantifying Project Experience with Numbers

  • Advanced answer tree that handles 2-3 follow-up questions

  • Practical Mock Interview Simulation Experience

"I got an interview scheduled, but I don't know what to prepare!!"

"Will it be enough to just memorize Java junior backend interview questions by heart?"

That's not right.


Backend technical interviews consist of two main components.

1. Experience Interview (Experience Questions)

"Please tell us about your experience using Redis"
"What was the most difficult technical problem you faced?"
"Why did you choose that technology?"

2. Technical Interview (Conceptual Questions)

"What is the operating principle of B-Tree indexes?"
"Please explain transaction isolation levels"
"What about data consistency when Redis and DB are updated simultaneously?"

We will properly prepare these two things over the course of 3 days.


I'll tell you about what actual students are most curious about

"What should I do if I really don't know anything at all?"

❓ "There's not much company information available, so how do I make an appeal?"

"What do I do when there's nothing to quantify?"

Practice by reviewing actual students' resumes and responses.

This is the only course where you can get immediate feedback on things you're genuinely curious about.


✅ Here's what you'll learn.

The 5-Step Selection Flow That Explains "Why"

  • 3 Real Resume Live Reviews

  • How to Quantify Toy Projects with K6 Load Testing

  • "I wrote it to learn" → The gaslighting technique of changing it to "I had to write it"


Complete Mastery of 7 Follow-up Question Patterns

  • Real-time Mock Interview Recreation (iusto's Legend)

  • Comparison of Rejection/Acceptance Responses by Pattern

  • How to compare 3 alternatives, how to handle edge cases


"What do you do if you really don't know?" Survival Skills

  • Sharing the Thought Process (Expressing Through Conditionals)

  • Buying time with clarifying questions

  • Narrowing the scope to what you know (K8s → Docker)

  • Honesty + Expression of Learning Intent


Complete DNA Analysis of NAVER, Kakao, Coupang, and Toss by Company

  • How to handle when company information is missing

  • Preparing Reverse Questions (Showing Interest in the Company)

  • 4-Week Preparation Plan Weekly Action Items



✨ Features of This Course

📌 Analysis based on actual companies.

This is not theory. These are actual events that happened in real interview rooms.
From rejection cases to acceptance cases,
from Kakao to Toss, Coupang,
and even unknown startups.

Understand each company's interview DNA,
analyze why you failed or why you succeeded,
and repeatedly practice applying this to your own answers.

It's not just a simple "tip".
It's a strategy proven in actual interview settings.



📌 Organizing "quantified experience" from start to finish with templates

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

So in this lecture,

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

This flow has been created to enable repeated learning in template form.

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


📌 Direct application through missions and feedback

This is not just a lecture you simply listen to.

Each Day includes missions for you to apply directly to your projects:

Day 1 Mission:

  • Rewrite 3 confident projects → into a 5-chapter structure

  • Documentation of Why for All Technology Stacks

  • Prepare answers for 10 expected follow-up questions

Day 2 Mission:

  • Write one personal experience perfectly using the ABC structure

  • 3 follow-up question responses (Why did you choose? Other methods? What did you learn?)


  • "Unknown Technology" Simulation (Applying 5 Survival Skills)

Day 3 Mission:

  • 1 response to "Unknown technical question"

  • Writing "Failed Experience" in STAR Format

  • Prepare 3 reverse questions


This is a thorough curriculum that can develop practical skills as well.



I recommend this for people like this

I keep failing interviews,
and I don't know why.
✔ Those who only give abstract answers like "I've used Redis" or "I improved performance"
✔ Those who get stuck on follow-up questions ("Why did you choose that?", "What other methods are there?")

I have projects, but I don't know what or how to talk about them.
✔ Those who want to change "It got much faster" into "specific expressions"
✔ Those who want to turn toy project experiences into interview-ready answers

I know the technology, but I can't explain it.
✔ Those who have used Redis, Kafka, MSA but can't provide reasons for "why they used them"
✔ Those who evaluated only by "feeling" without measuring Before/After metrics

🎁 EVENT 🎁

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

I've organized all the content learned in the course into a practical interview preparation template.

Company-specific Interview Strategy Checklist, Project Catalog, Experience & Technical Question Library


This is a Notion template where you can practice all of these things directly.

We will give this template to the first 100 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 __)

The person who created this course

The behind-the-scenes story of going all the way to final interviews at Coupang and Yanolja - A 6-year developer's job change story across 24 companies [ep 5]

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


Pre-enrollment Reference Information

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

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

😍 I'll do my best to answer you 😍

Practice Environment

  • Learn through questions and answers as if you're taking an actual technical interview through the course.


Learning Materials

  • I'll share everything with you via Notion and PDF!


Prerequisites and Important Notes

  • At least 1 backend project experience (school assignments, bootcamp, toy projects all acceptable)

  • Experience creating simple APIs with Spring or Node.js

  • Experience studying object-oriented programming, DBMS/RDBMS, cache, and index


Recommended for
these people

Who is this course right for?

  • A backend developer who has a technical interview coming up but feels overwhelmed about where to start preparing

  • A junior developer who experienced a mental breakdown after only answering "ACID..." to the question "What is a transaction?"

  • I've done projects, but I'm a junior developer who can't answer the question "So what were the results?" with numbers

  • Job applicants who keep failing interviews by repeating the same answers every time

Need to know before starting?

  • Spring Boot basic usage experience

  • JPA Basic Usage Experience

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Learners

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Reviews

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Answers

4.9

Rating

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Curriculum

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33 lectures ∙ (3hr 30min)

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