Nice to meet You!

Welcome to my profile! I'm Jung Do Hyun, a cloud education expert and software development engineer living in Seoul, Korea.

Summary

I have been working as Software Developer, Architect, IT Consultant, Tech Blogger and Technical Trainer since 1995.

Can perform any task related to software development if supported by the right resources, including time. Except English.

Interested in soft skills, hard skills, team building, process optimization, programming languages, frameworks, tooling, etc. related to software development optimization.

My tech stack

Experience

Amazon Web Service - Seoul, Korea (2016.07 ~ )

Software Development Engineer (2022.07 ~ )

As a developer and acting manager of the first Amazon development team in Korea, I was responsible for the following tasks

• Develop and operate services based on a full serverless microservices architecture
  • DDD-based service design
  • Design and implement a serverless architecture for no-ops
  • Implementing WDIO-based E2E testing
• Developing an A/B testing service
  • With a simple setup, this service allows you to flag features, run A/B tests, and analyze the results of your experiments by analyzing success metrics.
  • As a led developer, I performed requirements definition, design, implementation, operational planning, and security reviews on this project.
  • The service uses a fully serverless architecture, the infrastructure is built and managed with the AWS CDK, and the development language is TypeScript.
  • Built a fully automated Full CI/CD pipeline that doesn't require human approval.
• Develop and maintain authentication/authorization and user profile and subscription features for SkillBuilder
  • Developed various automation scripts/services to operations exallance.
    • Python, TypeScript
  • Suggested front-end performance improvements based on customer feedback, resulting in a 500% performance improvement.
• Developed aws.training
  • Performing issue analysis tasks and reports with DataWarehouse(Redshift).
  • Suggestions for streamlining team operations by analyzing historical issue tracker data.
    • SageMaker Canvas, PyCarot, Pandas

Technical Trainer (2016.07 ~ 2022.06)

As an AWS senior technical trainer, I taught the following subjects.

• AWS Cloud Practitioner Essentials
• AWS Cloud Essentials for Business Leaders
• AWS Technical Essentials
• Architecting on AWS
• Advanced Architecting on AWS
• Security Engineering on AWS
• Running Containers on Amazon Elastic Kubernetes Service (Amazon EKS)
• Big Data on AWS
• Developing on AWS
• Advanced Developing on AWS
• DevOps Engineering on AWS
• Deep Learning on AWS
• MLOps Engineering on AWS
• Machine Learning Pipeline on AWS
• Migrating to AWS
• Systems Operations on AWS
• Developing Serverless Solutions on AWS
• AWS Security Essentials

Mamezou - Tokyo, Japan (2013.01 ~ 2016.05)

Architect, IT Consultant

• Improve development processes and perform cloud migration as architects and IT consultants.
  • Introduce Git-based CI/CD pipeline
  • Introduce code review process
  • Cloud migration proejct management

Global Cybernet System - Tokyo, Japan (2002.06 ~ 2012.12)

Java Developer, Architect, General Manager

• Enterprise application development
• Embedded application development
• Data modeling
• Business modeling
• Improve and standardize the development process
• Project Management

LemonSoft - Seoul, Korea (2000.02 ~ 2002.03)

Web Developer, Game Producer

• Web game developer and game producer