Nice to meet you. I'm Je-hwan Yoo, a backend developer. I'm also proficient enough in frontend development to make a living.

I majored in Computer Science and Engineering and focused on Node.js during my undergraduate years. Now, I mainly work with Nest.js as my primary framework.

I favor MongoDB for NoSQL databases and know how to work with PostgreSQL for relational databases.

I'm skilled in implementing both RESTful and GraphQL. Recently, I've been exploring the use of gRPC.

I am cloud-native, with expertise in AWS. For simple full-stack services, I use platforms like Amplify and Vercel. I have developed a habit of dockerizing all my development environments.

Currently, I am learning how to develop and manage microservice architectures.

I favor development paradigms such as Functional Programming (FP), Dependency Injection (DI), Test-Driven Development (TDD), and Domain-Driven Design (DDD).

I think communication skills are very important as a developer, so I am practicing growing together by running a study group.

• CommelierGroup
• Hanghae plus - Backend 사전스터디 4조
• Hanghae plus - Backend 15조

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• JavaScript is love.
• I'm a wizard of TypeScript.
• Node.js is my life.

• Node.js - HTTP/2
• Node.js - HTTP/2 - SSE
• Express - HTTP/2

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• I enjoy the concurrency features of Go language.
• I use Python for solving coding tests. I used to be interested in data processing and machine learning as well.
• During my undergraduate years, I spent many challenging days with C/C++. I might be interested in Rust...
• I really hate PHP, but it's a necessary evil for earning extra income with a side job.

• go-concurrency

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• I can build both monolithic and microservices apps using Nest.js.
• I have a deep understanding of the Nest.js module system.
• I appreciate the simplicity of Express.js. When working with Express, I try to avoid complex layers and solve problems functionally.
• I can create frontend apps with React.js. I'm really good at centering things. Trust me.
• I'm currently studying Server-Side Rendering (SSR).

• nest-k8s-deployment

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• I believe semi-structured & NoSQL databases like MongoDB as the future.
• I can use MongoDB's aggregate functions.
• I can use session-based transactions in MongoDB.
• I can use text and geo indexing in MongoDB.
• I understand the basic level of DCL, DDL, and DML in Postgres.
• I know how to integrate both MongoDB and Postgres with ORMs (Mongoose, TypeORM).

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• Let's do TDD
• I effectively use dependency injection and mocking for testing.

• TDD by example using ts
• TDD basics using ts

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• I believe that dockerizing is the foundation of all development.
• I'm still learning Kubernetes, but I understand the basic concepts.

• cnk
• kubernetes-the-hard-way

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• I know the important AWS services well, like VPC, EC2, ECS/ECR, S3, Lambda, and CodePipeline.
• I can read and write AWS CloudFormation templates. (IaC)
• I can create AWS CDK with JavaScript or Go (IaC)
• I can develop using the AWS SDK for Node.js.
• I have experience deploying services using AWS Amplify.
• I have experience deploying services using Vercel.

• Heard Flutter is all the rage these days, huh?

• I'm not really interested in making desktop apps.