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A 4-Week Practical MSA Design Challenge with Code Reviews from a Developer with 15 Years of Experience

Through one live session per week, along with practical assignments and feedback, you will design the boundaries and models of an order domain using DDD. Over three weeks, you will complete an example project applying Hexagonal and Clean Architecture, CQRS, Event-Driven Architecture, and ACL. Including hands-on practice with inter-module communication using Kafka and gRPC, the entire program can be considered a four-week practical course!

Live sessions included

Meet and talk together

Mentoring provided

Guidance in the right direction

Start with peers

Together, to the end

Instant answers

Your questions get answered

Open chat available

Join on KakaoTalk

Challenge starts now! Let’s do it together!

Hello, this is Chamnalgae.


In a free live session analyzing backend job postings, we received many questions such as "I've developed in an MSA environment but lack design experience",
"Can I gain experience that will help me change jobs even in a monolithic environment?".

This four-week hands-on MSA design challenge addresses exactly those concerns.


Design the service boundaries of the order domain yourself,

By transforming monolithic code into a hexagonal architecture,

Practice when to introduce CQRS, Event-Driven, and ACL,

After completing your own design document,

You will even practice internal communication using Kafka and gRPC.

What matters is not listing a lot of technologies,

The goal is to gain design experience that allows you to explain why you chose this structure.


The challenge starts on September 8,

The first live design review will take place on Tuesday, September 15 at 8:00 p.m..

Rather than presenting immediately after the start, you will complete the Week 1 mission and then receive a review.

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