About the builder

Calm product interfaces, clear frontend systems, and motion that earns its place.

Front-End Developer

I'm a front-end developer focused on clear product interfaces, maintainable frontend systems, and recent AI-agent workflows that still hold up under engineering scrutiny.

Projects shipped
6+
Technologies used
28+
Years of practice
3+
Portrait of Manjoong Kim

I work best where product judgment, visual restraint, and implementation quality need to hold together under real delivery pressure.

Narrative

About Me

I'm a front-end developer with 3+ years of experience in building web applications using modern technologies like React. I have a strong understanding of HTML, CSS, and JavaScript, and I'm always eager to learn new frameworks and libraries. My development philosophy centers around clean, maintainable code and a user-first approach. I believe that great design is not just about aesthetics but also about usability and accessibility. I strive to create products that are both beautiful and easy to use for everyone.

My Strengths

Clean Code

UI/UX Design

Accessibility

Performance Optimization

Current focus

React architecture / Design system / Performance tuning / Agent orchestration

Recent path

Career Timeline

2026

Portfolio rebuild and narrative-driven architecture

Redesigned this portfolio around story-first sections, tokenized theming, stronger international UX consistency, and explicit AI-agent engineering proof.

2025

Product-focused frontend delivery

Built and shipped multiple product interfaces with improved filtering, modal flows, and maintainable component boundaries.

2024

Foundation in modern React ecosystem

Expanded expertise in React, Next.js, and TypeScript with a strong emphasis on accessibility and performance.

Working style

Working Principles

01

Solve product problems first

Start from user and business goals, then select the simplest implementation that can scale.

02

Design and code as one system

Build reusable UI primitives and design tokens so consistency improves as features grow.

03

Communicate with clarity

Prefer explicit naming, predictable structures, and documentation-ready prompts/checklists so both teammates and agents can execute safely.