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TL;DR

Backend engineer of Modusign, Inc

Love well-architected, fine-grained software

Tech & Skills

Languages: Typescript, Javascript, Java

Frameworks: Nestjs, koa, express, spring, typeorm, sequelize

Testing: jest, mocha-chai-sinon, k6

Database: mysql

DevOps: AWS, Docker, Git

Interested in

OOP, DDD, Layered architecture, TDD, MSA

Event-driven architecture

GraphQL, Kubernetes, Terraform

History

Modusign, Backend engineer (2017~)

  • REST API 설계
  • 모놀리스 애플리케이션 MSA 전환
    • Event driven architecture
  • typescript 및 nestjs 도입
  • docker를 사용한 컨테이너화 - docker-compose, ECS
  • TDD 도입
    • 행위주도-테스트(BDD), test double
  • DDD 도입
    • Event storming 등의 방법론을 통한 DDD 가속화
    • 전략/전술적 설계
    • CQRS
  • 계약 서비스 구현
  • 비즈니스 모델 전환
    • 건 단위 요금 산정 방식에서 구독 요금제 형식으로 전환
    • 사용자별 권한 및 사용량 모델 설계
  • 보안 인증 진행 (ISO27001)
    • application 계층에서의 사용자 데이터 암호화 (AES-256)
  • CI/CD
    • CircleCI를 사용한 애플리케이션 배포 프로세스
    • Github Actions로 이전
  • Logging
    • log 구조 설계, correlation_id 를 사용한 로그 트래킹
    • Elastic stack (Filebeat + Elasticsearch + Kibana)를 사용한 로그 수집
    • Cloudwatch + lambda + EK 사용하도록 변경
  • 사내 자동화 도구 개발
    • Git event hook, lambda, slack application 을 사용하여 이슈가 할당되면 담당자에게 멘션
    • 사용자의 결제 결과 slack 알림
    • 서비스 내 batch 실패 시 slack 알림

Mr. Ddak, Co-founder, Mobile app developer (2012~2014)

  • 부동산 거래 중개 플랫폼 모바일 애플리케이션 구현

Kyungbook National University (2008~2016)

  • Bachelor's degree of computer science & engineering

Contacts

Email: [email protected]

Social media: facebook, instagram, linkedIn

Kim Soohyun, shawn@modusign's Projects

grpc-go icon grpc-go

The Go language implementation of gRPC. HTTP/2 based RPC

pify icon pify

Promisify a callback-style function

risingstack-bootcamp icon risingstack-bootcamp

This is the Node.js Bootcamp we ask new recruits at RisingStack to finish in their first weeks. It helps to get the basics right, and prepare you to work on enterprise projects.

typeorm-transactional-cls-hooked icon typeorm-transactional-cls-hooked

A Transactional Method Decorator for typeorm that uses cls-hooked to handle and propagate transactions between different repositories and service methods. Inpired by Spring Trasnactional Annotation and Sequelize CLS

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