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Backend Development, How to Write a Winning Resume

Pass rate 1% -> 66%, 2nd year salary achieved 6,000 ☑️ I've compiled all the know-how that transformed a resume that was rejected over 300 times into one that 'always passes' into a single book. Do you feel like you're falling behind even though you're working as hard as everyone else? If you're having trouble even passing document screening despite taking countless courses and building your specs, there's a high chance you're misunderstanding the 'rules of the game.' This book will teach you the 'rules of the winning game' itself, so that your efforts lead to the results you deserve.

12 learners are taking this course

  • gritdev
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What you will learn!

  • Practical Formula to Instantly Increase Your Resume Pass Rate

  • Breaking the Curse of 'Building Specs' Through a 'Shift in Perspective'

  • Roadmap to Becoming an 'Irreplaceable Talent' in the AI Era

A pure liberal arts major in my 30s with no tech background, I started with a salary of 20 million won.


And in just 1 year, acceptance rate 1% -> 66%, 2nd year salary achieved 6 million ☑️
After conducting mentoring for over 160 people, I finally discovered the laws of a successful resume, and I'm revealing everything.


  • After 300 resume rejections, at the end of despair asking 'Am I just not good enough?', I discovered 'the rules of a game I couldn't lose'. The principles of a 'winning resume' that enabled a non-major with nothing to choose from desired large corporations within just one year, actual analysis of successful resumes, copy-paste ready templates - I've put everything into this one book.

  • Over the past 2 years of conducting practical mentoring for more than 160 people, I discovered one unfortunate common pattern. Most people weren't lacking things to write about, but rather they couldn't showcase what they had. This book doesn't contain abstract theories, but rather verified 'winning formulas' based on data from the entire job transition process.


  • And we propose passing and the next steps beyond that. In an era where AI writes code for us, how can you rapidly achieve compressed growth as a junior developer to seize new opportunities? Standing on the shoulders of the AI giant, leaping over a 10-year gap in one bound, finally reaching the point of 'becoming a developer who doesn't need a resume' and designing your own game - we've compiled all the answers we found through countless sleepless nights into this book.

Wait a moment! I'll save you some time.


Before investing your precious time and money, please focus for just 1 minute.

I'll quickly let you know if this book can really solve your problem.


✅ If you're this kind of person, this book will be your cheat code.

  • Someone who has submitted resumes dozens or hundreds of times but keeps getting rejected at the document screening stage and has lost confidence

  • A 1-3 year developer who is clearly working hard but feels like their growth has stagnated, and feels their resume is too ordinary

  • [[STRONG_1]]"비전공자라서"[[/STRONG_1]], [[STRONG_2]]"나이가 많아서"[[/STRONG_2]], [[STRONG_3]]"경력이 짧아서"[[/STRONG_3]] 포기하고 싶은 분

  • "I've learned Spring, JPA, Docker, but why can't I get hired?" Someone who has built up their specs but isn't seeing results

  • Those who want to go beyond simple employment and become irreplaceable developers in the AI era


This course is not suitable for these people.

  • Those whose main technology stack is other than web backend (the principles are universal, but examples are centered around Java/Spring.)

  • Those preparing for overseas employment or applying to global companies


  • Those with 5+ years of experience or those who already have their own solid resume philosophy (this book is optimized for entry-level to junior professionals)

  • "My way is right, I don't need advice" type of person (may conflict with the book's content)

  • Someone who wants to be spoon-fed the 'correct answer' without any effort


  • This book isn't just a simple listing of information, but rather a book that helps you first change your 'perspective' and then enables you to execute in a way that works.


💡 What This Book Does Not Cover

  • Algorithm Coding Test Preparation Methods (Focus on Resume)

  • Learning Methods for Tech Stacks like React and AWS

  • How to do well in interviews, how to do well in dating



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Did you scroll all the way down here?


Nice to meet you.

I'm Grit, who failed first and found the way by confronting challenges first.


You're probably looking at this screen right now with feelings like these.


  • "Could this be... the answer I've been looking for?"

  • "Could what this person is saying be true?"

  • "Can I change too?"



If you were drawn in by the introduction,

You're probably going through a similar process to what I experienced before changing jobs, or

I think you're at the stage of just starting to prepare for a developer career.


This book is for those who have the question 'Can I do it too?'

  • I'm getting old...

  • I'm not from a technical background, but...

  • I have a gap in my career...

  • They say your first job salary is important, but mine is too low...

Like an explorer discovering a dusty secret tome in the corner of an old library, there are surely those whose hearts are racingright now. With half doubt and half excitement, thinking 'Can I finally end this tiresome routine?' and 'I've finally found it.'

If my two years of failures and successes, those experiences and footsteps, have resonated with you, and if you have that intuition that only you seem to have noticed, something others don't know, then yes. That intuition is what I'm sending to you—an 'invitation'.


Let me briefly introduce myself.


I use the nickname Grit.

It's a name I chose when I started mentoring on Inflearn a year ago. While it also means 'persistence' and 'fighting spirit', it holds a more honest meaning for me.


Grind(갈아엎다) + It(그것을, 현실을)


I wanted to remember those moments when I broke through and overcame the wall of reality, despite lacking in specs, age, and educational background.


Three years ago, I too once pinned my hopes on someone's story, just like you.

"That person did it too... so I can probably do it as well, right?"


And I really did it.


📊 Let me show you my journey in numbers

  • Started development in early 30s as a pure liberal arts non-major


  • First salary in the 20 million won range → 50 million won range in just 1 year (100% increase rate)

  • 2nd year, achieved salary in the 60 million won range

  • Over 300 document rejections → 66% acceptance rate in the last 2 months (4 out of 6 applications to top-tier domestic companies accepted)

  • Current document screening pass rate confirmed at 85% (based on top-tier domestic companies)

  • Inflearn 1:1 mentoring conducted 45 times, rating 5.0 out of 5

  • Conducted mentoring for over 160 people including other bootcamps





I'll honestly share my career path and the salary increase rates that came with it.

  • Domestic large corporation subsidiary (service company): Starting salary in the 20 million won range (0 months experience)

  • Same company: Achieved 30 million won salary range (6 months in)

  • Pangyo Large Corporation: Achieved 50 million won salary range (1st year)

  • Same company: Achieved 60 million won salary (2nd year)


Although I started my career as a developer at a relatively late age,

I have unique experiences and my own job search/career change know-how accumulated based on them.

  • Experience of applying to over 300 places and being rejected countless times

  • Experience of countless contemplations on how to grow faster than others

  • Experience of rapid growth while gaining recognition and spending high-quality time at the company I used as a stepping stone

  • Experience of countless contemplations on how to effectively showcase my capabilities as much as I grow

  • Most importantly, the experience of increasing the success rate from around 1% to 66% by submitting resumes for career transition without any short-term exceptional experiences

During the latter 2 months of my job transition period, upgrading my resume through n stages

'I gained confidence that my resume is one that gets accepted, and

I was able to apply only to the top-tier companies that I really wanted to join.


Don't misunderstand.

I'm not a 'successful person', but rather 'someone who has failed first'.


There were far more things I didn't have.

❌ Prestigious university computer science degree

❌ Famous bootcamp completion experience (from unknown government-funded academy)

❌ Excellent coding test skills (50% average solving rate)

❌ Similar age to others (early 30s when first employed)

❌ Outstanding connections or background


Instead, I had something.

✅ The 'Winning Formula' Found Through 300 Failures

✅ Tenacity to never give up until the end

✅ An engineer's mindset of validating and improving with data


So perhaps I know best. Your situation.


"I'm getting old, but..."

"I'm not a CS major, but..."

"I have a gap in my career..."


I've made all these excuses(?) too, you know.

And I also know that those aren't excuses, but real barriers.


But at the same time, I also know this.

That there definitely exists a way to overcome that barrier.



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These are the things I heard most often while mentoring.


"To think that even my mentor went through times like this—for the first time, I thought 'I can do this too.'"

"Other mentors only talk about things that are too far removed, but you understand my situation exactly."

"I didn't know a resume could change like this. I finally gained confidence."


I'm not a 10-year senior.

I'm not a 'successful mentor' with a glamorous background either.


Instead, I am someone who stood in exactly the same position as you three years ago, had the same worries, and tasted the same despair.


There's an amazing fact I discovered while mentoring on Inflearn. Do you believe the following fact?


  • ✓ Mentor Experience: Junior with only 2-3 years ahead


    → No fancy resume or famous career background


    → In comparison, the actual Inflearn mentoring pool: NAVER, Kakao, LINE, Coupang, Baemin + many renowned developers from Silicon Valley

  • ✓ My mentoring price:

    The highest-priced resume mentoring on Inflearn (around 170,000 won)


    → Highest price sustained for over a year


    → More expensive than any other mentoring

  • Reservations close an average of 2 weeks in advance


    → Up to now, proceeding at 90%+ every Saturday


    → Always maintains full bookings with an average of about 2 weeks

  • ✓ Perfect 5.0 rating + Continuous stream of passing news


    → Not a single low rating


    → Continuously receiving acceptance news from actual mentees + maintaining friendships


At some point, I suddenly became curious.

I asked directly, "There must be many other good mentoring options out there, so why does everyone come to me?"

These are the responses that came back.


1️⃣ "I came here because an acquaintance recommended it" (more than half)

"My friend said the mentoring was really great..."

"Seeing a fellow bootcamp classmate's resume change..."

Is there any stronger evidence than when someone who actually spent their own 170,000 won and invested their time recommends it to an acquaintance saying "You should try this too"?


2️⃣ "It didn't end just once, and you kept watching over us"

"Other mentoring sessions ended after just one session, but my mentor met with me over 10 times"

I actually review resumes continuously - 10 times, 20 times, even up to 30 times. I'll help with interviews as much as you want too. The reason I started mentoring isn't to brag about myself.


3️⃣ "You were in a similar situation as the mentor"

"You had the exact same concerns as me three years ago, didn't you?"

"For the first time, I felt like 'this person understands my situation'"

Three years ago and even now, I continue to contemplate, experiment, fail, and challenge myself. As a fellow junior. As a fellow beginner. I don't say things I don't believe in. I don't tell you to do things I haven't done myself. I speak about methods that work now, not methods from 10 years ago.

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There's a real reason why I wrote this book.

I still often think about that day from three years ago.

It was the day when all the courses at the government-funded academy had ended, and I had even completed the final project. That entire day was scheduled for a "How to Write a Resume" lecture. The instructor was displaying something on the screen and explaining it, but I just stared blankly at the white Word page in front of me.

Really, it was a state of 'absolute nothingness'. I didn't even know where to start, what to do, or how to begin. Should I write in Word? PowerPoint? Or maybe Notion? That overwhelming feeling was bigger than I thought. I spent the entire morning just staring at a blinking cursor, and in the afternoon, with a throbbing headache, I eventually fled home like I was running away. That day, I couldn't write a single line except for my own name.

Looking back now, it wasn't that the lecture was bad. It's just that I wasn't ready at all to absorb it at the time.

I can't forget that overwhelming feeling of helplessness.

So the very first thing I ask before starting mentoring is this: What is the biggest difficulty you face in the process of job searching or career transition?

And I started from that point and tried to see it through to the end. Like it was my own work. I was just trying to become that 'person next to me' that I desperately wanted three years ago. I'm so grateful that so many people joined me in this journey.



The more I do mentoring, the more I realize that just like me three years ago, countless people today are still standing before the same overwhelming uncertainty I faced back then. And what's truly unfortunate is that most people have good resources, but they're heading in the wrong direction, putting their energy and time into the wrong places.

  • Why do some resumes get accepted while others get rejected?

  • Why do some people get ahead while others fall behind?

  • Why do some people say this market is difficult, while others say it's worth trying?

The fact that there are reasons for both what works and what doesn't work is actually quite comforting. Once you understand those reasons, or the 'rules of the game,' you can get on the right track without wasting time.


That's why I created this book.


  • How can I share this 'formula for success' that I've proven over 2 years with more than 160 people to even more people?

  • How can we reduce that overwhelming time to 1/100th for you?


The result of that intense contemplation is this very book.


Creating resumes together with 160 people,

Having conversations for over 2 hours each time, contemplating, and making revisions

All the patterns I discovered.


Revising resumes together 10, 20, 30 times each

"Oh, so this is how you pass when you change it like this"

Every moment confirmed by data.


Realized Through 300 Rejections

The painful truths about "why it didn't work."

And discovered while the acceptance rate increased from 1% to 66%

Clear formulas that say "this is how you do it."


All of this has been packed into one book of about 240 pages.


I didn't simply list information.

  • I spent hundreds of hours grinding to recreate 1:1 mentoring exactly as it is.

  • We tried to include all the 'clinical data' from over 160 actual resumes while protecting personal information.

  • Beyond resumes, we ultimately wanted to provide challenges and inspiration for one person's 'real' career design.

They don't spoon-feed you the answer by saying "Use it like this."

Instead, we diagnose the root cause of why your resume isn't working and instill the 'mindset' itself that transforms your experience into the finest dish.

After countless sleepless nights, failing first and hitting obstacles first, I'll now pass on the 'rules of the game' that I've discovered.


Let's go together. There's a way.

This is recommended for these types of people.

📌 Those who are stuck in the swamp of document screening

"I entered it 100 times, but why doesn't it work only for me?"

"Are they even looking at my resume?"



📌 Those who feel they have nothing to write about because their experiences are too ordinary

"Other people's resumes are impressive, but mine seems to have nothing but one CRUD project, and I feel overwhelmed"

📌 For those who have anxiety about being non-majors, age, and career gaps

"I won't make it because I'm not from a related major"

"I'm late because I'm old"

It would be really great if you are this type of person

✓ You've submitted dozens, even hundreds of resumes, but rejection emails have become more familiar than acceptance letters, and you're losing confidence in yourself

✓ While my study colleagues are going to interviews, I feel like I'm the only one stuck at the document screening stage, making me feel anxious and worried

✓ You definitely did something, but when you try to write it on your resume, you feel overwhelmed thinking "So what did I actually learn?" For those who want to know how to package their experiences as 'achievements'

✓ Those who feel that their projects seem too shabby when looking at other people's impressive project experiences

✓ Those who want to give up before even starting because of labels like "I'm not from a tech background," "I'm too old," or "I have a career gap"

✓ If you've been busy hiding or making excuses for your weaknesses on your resume because you didn't know how to explain them, and you want to transform that experience into a 'powerful narrative' that no one else can replicate


After completing the reading

(After reading through and actually implementing it)


✨ Changes You Can Apply Immediately


You'll experience an overwhelmingly increased pass rate.

→ Copy-paste ready templates and checklists you can apply starting today

→ Over 8 out of 10 people experience immediately improved acceptance rates during actual mentoring


Gain confidence that "my resume is a winning resume".

→ You can confidently click the apply button without worrying "Is this right?" anymore

→ When you receive an interview offer, you'll think "Of course!" instead of "Finally!"


Your perspective will completely change (Most important!).

→ "What more should I learn?" → "What can I show with what I have?"

→ "I am lacking" → "I am differentiated like this"

→ "Building specs" → "Proving value"


🚀 What You Gain in the Long Term


Master the 'resume design skills' you'll use for life.

→ You can update your resume immediately every time you change jobs or every time a project ends

→ It's not just a simple template - because you understand 'why it should be written this way,' you have the freedom to apply it flexibly


You'll develop strategies to survive in the AI era.

→ From "Will AI take away my job?" anxiety → To "Let's grow 10x faster with AI" opportunity

→ Revealing practical cases of creating senior-level results in just 3 months

→ Providing a concrete roadmap to becoming a 'developer who doesn't need a resume'


You will have an overwhelming advantage in the interview room.

→ Your resume becomes the interview script, so you'll only receive the questions you want

→ "Please explain this part in detail" → Perfect response with pre-prepared answers


📊 Specific Results

  • Instantly Submittable Updated Resume (Complete Version)

  • Self-Diagnosis Checklist 10 Items

  • Over 30 Copy-Paste Sentence Templates **Meeting & Communication Templates** 1. Thank you for your time today. I'll follow up with the action items by end of day. 2. Could you please clarify your expectations for this project? 3. I wanted to circle back on our previous discussion about [topic]. 4. Let me know if you need any additional information from my end. 5. I appreciate

  • 3 Real Resume Case Studies of Successful Applicants

  • AI Era Compressed Growth Strategy Roadmap


And above all, "I can do it too" is an unwavering conviction

Features of this book


Why doesn't effort lead to results?


This book clearly diagnoses the reason,

We present a specific formula that transforms all your experiences into 'acceptance signals'.



Feature 1. Data-verified, reproducible formula


Does a resume that always gets you through exist?


With this question in mind, I conducted countless experiments and research over the past two years. And I not only proved it myself but also confirmed that my hypothesis and methods work through working with numerous mentees.






We don't rely on vague 'success myths' or personal 'intuition'.


Beyond one person's success experience, I wanted to create 'a success formula that anyone can replicate'.


Over a period of more than 2 years, I conducted countless tests and validations on my own. I searched for answers while contemplating with over 160 mentees. I embraced the earnestness contained in each person's resume and pondered together, "How can we make this person's value shine even brighter?" Through that intense process, vast amounts of data naturally accumulated about which sentences lead to acceptance and which expressions result in rejection.

This book contains only the most reliable 'formula' that survived that entire journey, one that allows you to replicate the 8 out of 10 success rate.



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Feature 2. Fundamental solutions starting with perspective transformation


Are you worried that you have nothing to write about? Sorry, but that's the wrong question.


Many people focus on fixing the 'sentences' and 'words' in their resumes. But the real problem isn't writing skills. It's the 'perspective' itself of thinking of a resume as 'a record of what I've done'.

This book doesn't offer a 'quick fix prescription' of adding one more line to your specs, but instead proposes a 'perspective remodeling' that recreates all your experiences into 'sellable stories'. Before worrying about 'what more should I learn', it first solves 'how should I present what I have'. When your perspective changes, the same experiences become a completely different resume.

  • Wrong Question ❌ "What technology should I learn more?"

  • Correct Question

    ✅ "What can I prove with what I have?"

This book doesn't just tell you "how to write it" (How). It helps you understand the principles of "why you should write it that way" (Why) first.

It's not about changing what you have, but changing the eyes that look at it. Once your perspective changes, it becomes yours for life.


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Feature 3. A story from someone who was just like you 3 years ago, not a 10-year senior veteran


Having failed first, I understand your current concerns more accurately than anyone else.


Sometimes advice from someone who's just one step ahead can be more accurate than success stories from people who are too successful or tales of great figures who are already far ahead.

I started in my 30s, was a non-major, had a first salary in the 2,000s, and was rejected more than 300 times.

So, what's the difference?

  • ✓ Covers 'failure recovery stories', not 'success myths'.

    It's not about "working hard makes it work," but rather I'll share with you "the methods that don't work, I've realized."

  • ✓ We provide 'realistic solutions', not 'idealistic advice'.

    It doesn't show "This way is perfect," but rather "I also had this handicap, and this is how I broke through it."

  • ✓ Shows a path that is 'reproducible by anyone', not 'a genius's method'.

    Because they succeeded without a fancy background, you too gain the realistic confidence that "I can do this too."

Instead, it can be sharper and more painful.


You'll learn content like this.

Section 1: How to Design a Winning Game (Perspective Reset)


Why isn't my resume being read? You need to understand the rules of the game first!


Key Keywords

Perspective Shift | Resume Essence Redefinition | Recruiter Psychology | Problem-Solving Narrative | Practical Case Analysis



A winning resume's fate is already decided before the first sentence is even written.

Because whose perspective you take and what strategy you approach with determines everything. In this section, you will learn the most fundamental shift in perspective that will transform you from 'a candidate who gets rejected' to 'talent that gets chosen.'

  • ✓ The '40-Second Rule' That Hacks Recruiters' Minds

    Why my resume gets rejected without even being read - we'll uncover the reality of 'negative filtering' that eliminates 90% of candidates and learn how to survive it.

  • ✓ How to Redefine My Ordinary Experiences as 'Grade A Products'

    Redefine your resume not as 'my diary' but as 'a marketing document that sells me.' Completely shift your perspective from 'what I have done' to 'what value I can provide.'

  • ✓ Beyond specs, the skill of finding weapons in your real 'story'

    While others only look at flashy tech stacks, those who get hired sell their 'story'. I'll teach you the technique to discover the powerful weapon hidden within your experiences.

  • ✓ The principles of 'strategic editing' that transform even weaknesses into powerful narratives

    Learn how to transform your weaknesses such as being a non-major or having career gaps into compelling stories through real-world examples and master the principles behind this approach.


After reading this far

  • "Ah, so that's why my resume wasn't getting read" You'll be able to make a clear diagnosis.

  • "So this is how it's done" You'll gain concrete solutions.

  • You'll gain the confidence that "I can do this too".


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Section 2: How to Create a 'Story' That Always Gets Through (Practical Writing)


"Ready-to-use templates and growth strategies that are 10 years ahead"


Key Keywords

Copy-paste templates | Winning resume analysis | Case-by-case strategies | AI accelerated growth | Long-term career planning

If you've equipped yourself with the right perspective, now it's time to transform all your experiences into stories that 'must be read.'

In this section, we cover everything from writing principles that resonate with a developer's mind to magical formulas that transform any experience into a winning narrative. We cover all the practical techniques that will get your hands moving directly.

  • ✓ 4-Step Formula to Transform All Experiences into 'Problem-Solution' Stories

    → Bland feature listings transform into intriguing 'adventure stories' that interviewers can't help but ask about out of curiosity.

  • ✓ "So... what should I write?" 30+ copy-paste sentence templates to end your writer's block

    → Stop wasting time in front of a blank screen. You can immediately upgrade your resume by selecting sentences that fit your situation.

  • ✓ How did non-majors, newcomers, and juniors get hired? In-depth analysis of 3 actual successful resumes

    → Discover how people who started in similar situations to yours created their own stories, and dissect their success strategies in detail to make them your own.

  • ✓ A resume is just the beginning - how to become a developer who 'grows 10x with AI'

    → We reveal a specific roadmap to becoming a 'developer who doesn't need a resume' and practical examples of creating senior-level results in just 3 months.


After reading this far:

  • You can revise and submit your resume right away today.

  • You can predict interview questions and prepare scripts in advance.

  • Beyond short-term employment, you can design long-term career strategies as well.


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💡 The Organizational Philosophy of This Book

Part 0-2 (40%): Perspective Reset + Understanding Principles

→ Accurate diagnosis of "why it didn't work"


Part 3-6 (60%): Practical Application + Growth Strategy

→ "How to do it" specific execution


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🎁 PLUS: Don't worry alone

Q&A Special Appendix That Will Resolve Even Your Last Doubts


"What should I do if I get stuck while reading a book?"

"My situation is a bit unique, but would this still be applicable?"


It doesn't just deliver knowledge one-way and end there.

I'll answer in advance all the questions and anxieties you might encounter on your journey to completing your resume.

  • 1. Midpoint check Q&A to avoid getting lost

    You might have this question while reading the book.

    "My project is ordinary though?"


    "I'm new here, how do I write about my achievements?"

    ... It's okay.

    This book has placed the exact questions that mentees who walked this path before you asked at every point where you might get lost, along with clear answers in advance.




  • 2. Almost Every Problem You'll Face, Practical Mentoring FAQ 60

    These aren't hypothetical questions.



    Over the past year, I've compiled records of real concerns that I discovered while working hard together with over 160 mentees - 45 from Inflearn and more than 115 from other bootcamps.



    From resume format to technology selection, interviews, and career strategy.


    I'm confident that this already contains the answers to almost all the questions you'll encounter going forward.

    ✓ TOP 10 Most Frequently Asked Questions


    ✓ Solution strategies by case (non-majors/career changers/employment gaps/age)

    )


    ✓ Detailed questions like "Is it okay to ask about this kind of thing too?"


    ✓ Specific solutions that actually worked



I wrote this with the purpose of going beyond just telling you the 'methods' and becoming a 'reliable mentor' who will be with you throughout your entire hiring journey.

Until it works, that's my way

We don't just stop at the book. We truly go together until you pass.


One thing I realized while doing mentoring is this.


"Almost no one can finish it with just one book"


Real change must come from 'action'.

But the path of going it alone can be lonely and overwhelming too.


We shouldn't just talk about it, we really need to go together.


[A Promise to All Buyers]


  1. Invitation to 'Growing Together' Developer Community

    Don't struggle alone anymore. I'll invite you to our KakaoTalk group where over 100 people have gathered. Together, we share information and support each other's growth as we move forward.

    ✓ Official KakaoTalk Community Invitation (Currently 100+ members)


    → Networking with colleagues who share the same concerns


    → Pass reviews, interview tips, and real-time sharing of the latest job information


    → "I'm not the only one struggling" comfort and "I can do it too" motivation



  2. 1:1 Open Chat Room with Author 'Grit'

    From trivial questions that make you think "Is it okay to ask about this?" to career concerns you can't share with others. We'll open a private channel just for you, 24/7, 365 days a year. Any question is welcome.



    I welcome you bothering me.

    ✓ 1:1 personal open chat room provided


    → Personal questions that feel burdensome to post in the community


    → Any questions are OK (resume, technical, overall career)


    → 24/7/365 continuous responses



  3. Lifetime Updates & Additional Materials

    We'll update the book as the job market changes. When we have materials worth sharing, we'll share them with you first.



    → Free provision when adding new case studies and templates


    → A book that continues to evolve even after purchase




🔥 [Promise for the First 20 People]


For the price of one book, we give you everything we can offer.


'Unlimited' resume reviews until you pass

This isn't feedback you see once and it's over. From setting the direction of your resume to each and every sentence, we work together until you're satisfied and companies are satisfied.

Unlimited resume editing (no limit on number of times)

→ Not just "this is good enough" level, but "this will definitely get you hired" level

→ Not just 1 or 2 times. 10 times, 20 times... until you get accepted by the company you want

Just like real mentoring. There are people who come back for revisions more than 10 times. Those people end up doing well in the end.


Provides 'mock interviews' in the same environment as actual interviews

After passing the document screening, prepare for the most daunting interview as if it were the real thing. Mock interviews also require different styles depending on company characteristics. From expected questions to follow-up questions to pressure questions. We maximize your chances of success to the extreme.


✓ 1 mock interview session provided (Google Meet, 60~120 minutes)

Resume-based practical questions + immediate feedback

→ Accurate diagnosis of how you appear from the interviewer's perspective


⚠️ Please read this before purchasing.

Finally, I'll share something really important with you.


This book is not magic.

Just buying a book doesn't change anything. Your resume doesn't automatically get completed the moment you download a PDF. Just reading doesn't increase your acceptance rate.


I'll be honest with you.

This book will demand a lot from you.


✓ First, 'time'it is.

  • It takes 3-4 hours just to thoroughly read Part 0-6

  • It actually takes 5-10 hours to rewrite a resume

  • 2-3 hours to refine while referencing the appendix FAQ


A minimum of 10 hours, or more, of absolute time investment is required.


✓ Second, 'courage'.

  • "Why didn't my resume work?" The courage to face it objectively

  • The courage to admit "I was wrong"

  • "I need to completely overhaul the resume I've built up until now" - the courage to make that decision

You may need to completely overhaul your resume.


✓ Third, 'action'is what matters.

  • You need to sit directly in front of the computer and type.

  • Please read Part 3 and rewrite your self-introduction.

  • Completely overhaul the project description while reading Part 4

  • Please fix items 10 and 20 using the appendix checklist

Reading is not enough. You must write it yourself.


✓ Fourth, 'patience'it is.

  • The patience to accept that perfect results may not come all at once

  • When receiving another rejection email, the patience to find 'areas for improvement' instead of despair

  • Patience to maintain my own pace without being rushed by news of others' successes around me


Even if things don't change overnight, it requires the patience to believe in the right direction and keep moving forward.


Finally, let me be completely honest with you.

If you do it this way, nothing will change even after buying this book.


❌ Download PDF, skim through it once, and that's it

❌ Procrastinating with "I'll do it later" and then forgetting about it

❌ Only reading but not actually fixing the resume

❌ "This doesn't seem right for me" and giving up halfway through

❌ Looks at the checklist, says "too bothersome," and skips it


You're literally just throwing money away 100%.

But on the other hand, if you're actually executing it.


✅ Part 0-2 Reading and realizing "Ah, so that's why I was eliminated"

✅ Part 3-4 Read and move your hands to directly improve your resume

✅ Learn the "this is how to write it" pattern by looking at Part 5 success cases

✅ Revised over 10 times using the appendix checklist

✅ If you get stuck, go back to Part 7 FAQ to find answers

✅ Ask questions and get feedback in the community


If you do this, your resume will definitely change.


Once you gain confidence from your resume, many things will change from that point on.

That's because the first step of document screening is something you can make perfect with thorough preparation.

Once your resume is complete, you can focus on the next steps, making it realistically possible to get accepted at top-tier companies.


If it still doesn't work even after doing that, bring it to me. Bring it ten times, twenty times if needed.

However, there is one condition.

Think for yourself, act, make an effort, and never give up.


I'll help you until it works, until the very end.

Do you have any questions?

I'll answer in advance the questions you've asked most frequently and the ones you're probably most curious about.

Q. My experience is limited to ordinary CRUD projects... Can I still create a 'viable' resume with this?

A. Yes, it's 100% possible. In fact, this book is specifically for people like you. The secret to success lies not in the 'size of experience' but in the 'depth of experience.' This book teaches you to ask 'why?' ten times about your CRUD projects, helping you extract 'problem-solving narratives' that even senior interviewers would find interesting, such as 'experience solving concurrency issues' or 'experience optimizing N+1 problems.' The more ordinary the ingredients, the more important the chef's skills become.

Q. I'm a non-major who came from government-funded training. My specs are nowhere near what's needed for the so-called 'big tech companies', so will this book really be helpful?

A. Actually, I wrote this for people like you. I was also a non-major in my 30s from an unknown government-funded academy. Because I had nothing, I had to obsess over how to 'showcase' what I had at 120%. This book is not for people with impressive credentials. It's a 'survival strategy guide' for people like you who need to create the best dish with insufficient ingredients. I will prove with all my experience how your weaknesses can become powerful weapons that no one else can imitate.

Q. Honestly, resume-related information is all over the internet. What's the decisive difference between this book and blog posts or other courses?

A. That's a good question. There are 3 decisive differences.

  1. We teach you the 'system'. Rather than scattered advice, we provide a reproducible 'formula' that delivers results when followed exactly.

  2. Proven with 'data'. This is not my personal success story, but a methodology verified through over 160 mentoring cases, proven effective for 8 out of 10 people.

  3. We design your 'career'. Beyond simple job hunting, we present a long-term roadmap to survive in the AI era and become a 'developer who doesn't need a resume'. This isn't just a resume book.

Q. Does just reading the book increase the pass rate by 10 times? Were there no 'failure cases' in the mentoring?

A. 당연히 있습니다. 책을 읽기만 하고, 단 한 줄도 자신의 이력서에 적용하지 않은 분들은 변하지 않았습니다. 이 책은 '읽는 책'이 아니라 [[STRONG_1]]'당신의 손을 움직이게 만드는 책'[[/STRONG_1]]입니다. 성공과 실패를 가른 유일한 차이는 [[STRONG_2]]'실행'[[/STRONG_2]]이었습니다. 하지만 저는 약속합니다. 이 책에서 제시한 공식을 끝까지 실행했음에도 길이 보이지 않는다면, 저를 찾아오십시오. [[STRONG_3]]저는 '될 때까지' 함께하는 사람입니다.[[/STRONG_3]] 당신의 실패는 저의 실패이기도 하기에, 절대 혼자 두지 않겠습니다.

Q3. "Is it over once I buy the book? Do I need to pay any additional money?"

"It's actually the opposite. We provide mentoring in addition to the book price."

Many people are surprised by this part,

I don't want this book to be something you just 'read and finish.' So that you can actually produce 'results,' I've included my 'time' and 'experience' along with the book's price.

All purchasers will receive an invitation to a community that I personally operate, and I'll open a private chat room where you can ask 1:1 questions anytime. If you get stuck on anything, don't struggle alone - reach out to me 24/7 anytime.

There are no additional costs.

Pre-enrollment Reference Information

E-book Format and Environment

  • Provided in PDF file format

  • Viewable on all devices (PC, tablet, smartphone)


  • Printable (for personal learning purposes only)

Required Tools

  • PDF Reader (Adobe Reader, Chrome browser, and other free programs)


  • Resume creation tools (Figma, MS Word, Google Docs, or any tool you prefer to use)


  • No special software or development environment required


Recommended Learning Environment

  • A quiet space where you can concentrate


  • Tools for taking notes (both digital/paper are OK)


  • I recommend opening your actual resume file and making edits while reading.


Provided learning materials

E-book Content

  • Total 7 Parts, 20 Chapters

  • Approximately 240 pages (PDF standard)

  • Includes 3 actual successful resume examples (adapted)

Appendix Materials

  • Self-Diagnosis Checklist 10 Items

  • 30+ Copy-Paste Sentence Templates 1. Thank you for your hard work. 2. Please let me know if you have any questions. 3. I look forward to hearing from you soon. 4. Could you please confirm receipt of this message? 5. I apologize for any inconvenience caused. 6. Please find the attached file for your review. 7. I would appreciate your prompt response.

  • Practical Mentoring FAQ 60 Questions

  • Case-by-Case Application Guide

Community Resources

  • KakaoTalk Open Chat Room Invitation Link

  • How to Connect to 1:1 Open Chat

  • [First Come, First Served] How to Apply for Mock Interviews


Update Policy

  • Update content when the job market changes

  • Free provision when adding new case studies

  • Email update notifications to buyers

Question and Answer Support

Community Support

  • KakaoTalk Open Chat Room (100+ Community)

  • 1:1 personal open chat always available

  • Average response within 24 hours (same-day response for urgent cases)

Question Scope

  • All questions related to resume writing

  • Parts of the book content that I don't understand

  • Thinking about how to apply this to my situation

  • All questions related to technology as a developer

  • Career advice in general

Copyright and Precautions

Copyright Notice

  • All content in this e-book is protected by copyright law

  • Personal printing and storage for learning purposes is permitted.

  • Unauthorized reproduction, distribution, and creation of derivative works may result in legal liability

  • Commercial use strictly prohibited

Privacy Protection

  • All resume examples included in the book have been adapted to protect personal information.

  • Prohibition of leaking others' resumes or personal information within the community

Refund Policy

  • Follows Inflearn's refund policy

  • Due to the nature of e-books, refunds may be limited after download.

  • Please thoroughly check the preview and table of contents before purchasing


Inquiries

  • Technical Issues: Inflearn Customer Center

  • Content-related questions: Community or 1:1 open chat

  • Other inquiries: mentor.grit@gmail.com

Recommended for
these people

Who is this course right for?

  • Job seekers and junior developers exhausted from dozens or hundreds of resume rejections

  • Developers with 1-3 years of experience who feel their resume looks shabby compared to their actual skills

  • Junior/experienced developers who want to change jobs but are anxious about their competitiveness

  • A mid-level developer who wants to break away from a stable but ordinary career

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32 lectures

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