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I started my development career in Japan as a QA Engineer. In South Korea, I worked as a full-stack developer with strong front-end skills. At a startup I built many projects from A to Z. Initially I worked as a full-stack developer, and later I focused on project management and front-end work. I have experience using Python, AWS, and Azure, and I have designed system architectures for different projects. My biggest strength is front-end development, especially data visualization, and I am comfortable creating charts and interactive visuals. I also leverage AI-assisted workflows to boost productivity and speed up delivery.…I started my development career in Japan as a QA Engineer. In South Korea, I worked as a full-stack developer with strong front-end skills. At a startup I built many projects from A to Z. Initially I worked as a full-stack developer, and later I focused on project management and front-end work. I have experience using Python, AWS, and Azure, and I have designed system architectures for different projects. My biggest strength is front-end development, especially data visualization, and I am comfortable creating charts and interactive visuals. I also leverage AI-assisted workflows to boost productivity and speed up delivery.

DoHyoung Kim

QA Engineer, Full Stack Developer, Front-End Developer, +2

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I started my development career in Japan as a QA Engineer. In South Korea, I worked as a full-stack developer with strong front-end skills. At a startup I built many projects from A to Z. Initially I worked as a full-stack developer, and later I focused on project management and front-end work. I have experience using Python, AWS, and Azure, and I have designed system architectures for different projects. My biggest strength is front-end development, especially data visualization, and I am comfortable creating charts and interactive visuals. I also leverage AI-assisted workflows to boost productivity and speed up delivery.…I started my development career in Japan as a QA Engineer. In South Korea, I worked as a full-stack developer with strong front-end skills. At a startup I built many projects from A to Z. Initially I worked as a full-stack developer, and later I focused on project management and front-end work. I have experience using Python, AWS, and Azure, and I have designed system architectures for different projects. My biggest strength is front-end development, especially data visualization, and I am comfortable creating charts and interactive visuals. I also leverage AI-assisted workflows to boost productivity and speed up delivery.

Available to hire

I started my development career in Japan as a QA Engineer. In South Korea, I worked as a full-stack developer with strong front-end skills. At a startup I built many projects from A to Z. Initially I worked as a full-stack developer, and later I focused on project management and front-end work.

I have experience using Python, AWS, and Azure, and I have designed system architectures for different projects. My biggest strength is front-end development, especially data visualization, and I am comfortable creating charts and interactive visuals. I also leverage AI-assisted workflows to boost productivity and speed up delivery.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Korean

Fluent

English

Intermediate

Japanese

Advanced

Work Experience

QA Engineer at GCS

August 1, 2019 - October 1, 2020

QA Engineer in Tokyo, Japan.

Frontend Lead / Full Stack Developer

April 1, 2021 - July 1, 2025

Frontend Lead responsible for scalable React/Next.js applications built with TypeScript; managed AWS/Azure cloud infrastructure; maintained and modernized legacy JavaScript/Node.js/Python systems with Docker-based deployments; contributed to automated data processing and analytics workflows.

Full Stack Engineer at Corporate Insight

April 1, 2021 - July 1, 2025

Frontend Lead responsible for scalable React/Next.js apps built with TypeScript. Managed AWS/Azure cloud infrastructure and modernized legacy JavaScript/Node.js/Python systems with Docker deployments. Built Python-based serverless functions for automated data processing and analytics workflows, contributing to a patent-pending depression prediction model in South Korea. Leveraged AI tools (ChatGPT, Claude, GitHub Copilot) to generate and validate test cases, speeding up development and improving reliability. Created a back-office dashboard with a 'vibe coding' approach, translating complex clinical workflows into a delivery-tracking UI. Conducted backend performance/load testing with JMeter and monitored system health with AWS CloudWatch and PostgreSQL. Collaborated closely with backend engineers to identify bottlenecks and improve reliability.