Hello, I'm Lee Jung-hwan.
It's been a while since I've greeted you through a new update. Is everyone holding up well in this sweltering summer heat?!
I'm barely holding on thanks to the power of watermelon 🍉 lol
I am writing this update because there is a book (course) I would like to recommend to you all today!
Frontend System Design: Frontend as a Distributed System is the book I'm talking about.
It is currently being sold as a course on Inflearn, and a 50% early bird discount is underway!
This book covers the aspects that must be considered when designing services as a frontend developer.
It contains content that expands step-by-step from simple components to systemic thinking.
I would highly recommend this to anyone who has often wondered, "Is this the best structure?" as their service grows in scale!
The original author of the book is Juntao Qiu, who was a developer at Atlassian.
Byte Freaks Studio (a.k.a. Kill-9) has translated it well into Korean and published it as a book.
I was honored to be given the opportunity to write a recommendation, so my testimonial is also included 😀
PS. Just in case... you might be thinking, "Is this an ad?! Are you getting a commission!?" ...
The course link I've attached is a promotional link for the instructor Byte Freaks Studio (a.k.a Kill-9)!
This is not my affiliate link. I do not receive any revenue from this 🥲
I just really wanted to recommend it because it contains so much great content that would be wonderful for you to read whenever you have the time!
I hope you have a wonderful summer and stay cool!
I am always rooting for you with all my heart.
Thank you
Best regards, Junghwan Lee
Hello students, I'm Jeonghwan Lee 😊
The production of the new course "Vibe Coding in Bite-Sized Pieces" has been fully completed, and
It is scheduled to be released on May 12th (Tuesday).
Pre-registration Event Information
‣ Event Benefits Information
50% discount coupons provided to all applicants
30 winners will be selected by lottery to receive a 100% discount coupon
‣ Event Schedule Information
Application Period: Until midnight on Monday, May 11th
Winner announcement and coupon distribution: During the day on Tuesday, May 12th
‣ How to apply for the event
Please apply using the Google Form below!
https://link.onebitefe.com/r/fr4gd7
New Course Introduction
Lecture Introduction Video: https://youtu.be/8aFULNwP5pg
AI is only as great as you are.
Even when using the same tool, the depth of the results varies depending on the user's level of understanding.
Anyone can ask an AI to "make this," but if you don't understand why the code it wrote works or why it doesn't, you will eventually hit a wall.
Over the past six months, I have prepared a new course that combines AI tool usage with the essential core development knowledge required for "vibe coding," all to help you get past that "stuck point."
Only the most essential core development knowledge
cut into bite-sized pieces
Since food that looks good
also tastes good
So that you can easily organize even complex concepts,
It comes with intuitive animated visual aids.
Difficult concepts are explained easily through high-quality visual materials.
We appreciate your great interest 🙂
Thank you always. Sincerely, Jung-hwan Lee
Hello students 🙂 I'm Hyobin Kim.
Only 5 days left until the recruitment for the 9th One-bite Challenge closes, so I am reaching out once again ⏰
(Until midnight on Monday, April 6th)✦ What is the One-Bite Challenge?
The One-Bite Challenge is a completion challenge conducted through missions and a progress chart.
It was designed based on the fact that many people find it difficult to complete a course.
As a course creator, I am conducting this with a sense of responsibility to ensure that students don't feel alone
and can enjoyably reach the end of the course.✦ Gifts for participants
For the 9th Winter Bite Challenge participants, we are providing a 30% discount coupon for the course corresponding to the challenge.
Please refer to the details page for each challenge for the lecture discount coupons!
✦ List of Available Challenges
One Bite React.js (Once-a-week mission, project and simple quiz)
Bite-Sized Next.js (Once-a-week mission, project and simple quiz)
✦ Still undecided about applying for the challenge?
If you are hesitant about applying for the 9th One Bite Challenge,
please sign up for the free Live session scheduled for Monday, April 6th at 7 PM!7 giờ tối thứ Hai ngày 6 tháng 4!We will be hosting a brief introduction and Q&A session about the One Bite Challenge, so we look forward to your active participation.
Sign up for the free live session: https://link.onebitefe.com/r/7wqf9w
We look forward to the active participation of all our students.
Thank you 🙇🏻♀️
One Bite Challenge 9th Cohort Recruitment Guide
The amount and duration vary for each challenge, so please refer to the link below for more details 🙂
✦ What is the Bite-Sized Challenge?
The Winter Bite Challenge is a completion challenge conducted through missions and a progress chart.
It was designed based on the fact that many people find it difficult to complete a course,
and as a course creator, I am conducting this with a sense of responsibility to ensure that students don't feel lonely!
The goal is to help everyone enjoy the journey and successfully finish the course until the end.✦ How does it work?
Participants will be provided with a curriculum schedule and missions to review the lecture content.
Follow the curriculum schedule to take the lectures, then complete and submit the review missions.
(For the JS and TS challenges, missions are provided 5 times a week; for the React.js and Next.js challenges, missions are provided once a week)
How to Apply
1) Apply for a challenge on your desired topic
This 9th Winterloode Challenge will be conducted with a total of 4 courses.
Please apply for the course you want through the link below 🏆
2) Apply for Free Live OT
If you have applied for the challenge of your choice according to the instructions above,
You can apply for the free Live OT for challenge participants via the link below.
(Scheduled for April 6th at 7:00 PM)(Even if you do not apply for the Live OT, a recorded version will be provided to all challenge participants)
We appreciate your interest 🙏
🏆 Please participate in the 2025 Hanip Survey
We will provide a 35% course discount coupon to everyone who participates in the survey,
Through a raffle, we will provide 100% course discount coupons
Hello, this is Lee Jeong-hwan
To commemorate the end of 2025, we are conducting the Hanip Community Year-End Survey 🏆
* Survey results will be compiled and shared on the cafe by January 9th (Friday)
🔗 Survey Form Link: https://link.onebitefe.com/r/hgy83a
If the above link doesn't work: https://forms.gle/CbQNV244TrXX7T4d8
For those who have completed the survey submission
A very special gift is also prepared 🎁
[ Participation Reward Information ] ‣ 30 winners selected by lottery: 100% discount coupon for 1 course of your choice (including new courses, scheduled to launch April-May 2026) ‣ All participants: 35
[ Participation Rewards ]
‣ 30 people selected by lottery: 100% discount coupon for 1 course of your choice (including new courses, scheduled to launch April-May 2026)
‣ All participants: 35% discount coupon for 1 course of your choice (including new courses, scheduled to launch April-May 2026)
(If you choose a new course, receive a 55% discount coupon, higher than the pre-registration event!)
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‣ How to participate: Submit survey results
‣ Participation Period: 12.31(Wed) ~ 01.04(Sun) until midnight
‣ Results announcement: Monday, 01.05, during the afternoon
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‣ The topic has not been finalized yet.
‣ We are currently considering topics in CS areas (networks, data structures, etc.).
‣ Scheduled to be released in April-May 2026.
[ Guidance ] ‣ The topic has not been finalized yet. ‣ Currently considering topics in CS areas (networks, data structures, etc...). ‣ Scheduled for release in April-May 2026.
[ Notice of Precautions ]
‣ If you enter your email incorrectly, we may not be able to notify you of winning or deliver your coupon. Please make sure to double-check
‣ Duplicate entries are not allowed. Thank you for your understanding.
🔗 Survey Form Link: https://link.onebitefe.com/r/hgy83a
If the above link doesn't work: https://forms.gle/CbQNV244TrXX7T4d8
The results of this survey will be used as the basis for determining the direction of course production in 2025.
Your responses will be reflected in the actual courses.
Thank you all so much.
- From Jeong-hwan Lee 🙇♂
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Celebrating the 2025 Inflearn Awards "Bestseller" Win
50% Off: Bite-Sized TypeScript
Hello everyone, this is Lee Jeong-hwan 😀
Bite-Sized TypeScript Course
Selected as "Best Seller" at Inflearn Awards 2025!
- Source: https://inf.run/NbuwA
- Faces have been blurred to protect the portrait rights of the fellow knowledge sharers who received awards together
Thank you sincerely for all the love you've shown us over the past year.
We've prepared a massive discount event to show our appreciation for your love and support!
Event Information
We're distributing 50% discount coupons for the Bite-Sized TypeScript course!
(Limited to first 500 people)
You can find discount coupons in the cafe announcement below.
https://link.onebitefe.com/r/45jc3w
Acknowledgments
Thank you for sending so much love that allowed me to receive such a wonderful award at the end of the year
I would like to express my sincere gratitude to all students and readers.
Thanks to all of you, I was able to wrap up this year warmly.
I will continuously strive to bring you more good news, useful and enjoyable stories, even during these difficult times.
I'll work hard until the end with the same enthusiasm I had when I started, without wavering. Thank you so much.
I sincerely hope you have a warm year-end filled with as much warmth as the love you've shared with us.
I will always support and work hard. Thank you.
- From Lee Jeong-hwan
