Web Frontend Programmer
Mu-Hun Kim

Senior Computer Engineering student graduating in Feb 2026, with three years of hands-on frontend engineering experience across multiple startups.

Work Experience

Web Frontend Engineer, Penxle Company

I joined as a contract frontend engineer three months before the launch of the web novel service Glyph.
The company operated under an open-business model where all service code available as open source.
*The service was discontinued in March 2025 due to financial constraints.

Tools and Systems

  • Primary tools: Vite, TypeScript, SvelteKit, PandaCSS, GraphQL
  • Shared backend data models using GraphQL schemas
  • WYSIWYG Document Editor Implementation using “Tiptap” Editor Development Kit

Key Responsibilities

  • Launch Preparation

    • Implemented core features of the WYSIWYG editor in collaboration with the CTO (PRs: #353, #357, #552, #363)
    • Contributed actively to product planning, UX discussions, and overall frontend architecture.

  • UI Renewal Project

    • Improved key input UI interactions and refined accessibility behaviors (Example: PR#1296)

  • Rebranding Project

    • Rebranding from “Penxle” to “Glyph” due to low search discoverability.
    • Led logo, header/footer, and WYSIWYG editor UI updates.
    • Contributed part-time while returning to university.
      PRs: #1613, #1621, #1625

Software Engineer, Uniquegood Company

At the “Realworld” platform — a gamified, AR-based mobile game platform — I was responsible for the internal authoring tools and platform-side web services.

Key Responsibilities

  • Built and maintained the company’s CMS web service, mobile webviews, and in-game interactive web screens.
  • Delivered regular updates based on internal creator feedback.
  • Built plugin extensions for the in-game WYSIWYG editor.
  • Fully rebuilt the legacy authoring environment into Realworld Studio, using a modern React-based architecture.

Engineering Intern, Planetarium

Participated in an engineering internship at Planetarium, an open-business startup developing decentralized online game “Nine Chronicles”.

Technical Skills & Experience

Public Talks & Publications

Web Accessibility for Everyone: What and How — FEConf 2025

As an official speaker at FEConf 2025, I introduced core concepts of web accessibility and practical methods for implementing accessible interfaces. Condensing broad accessibility guidelines into actionable, developer-friendly insights was a key challenge.

Improving Campus Web Services with Userscripts — Microsoftware Issue 399

I introduced a case where I resolved inconvenient user flows in Jeju National University’s campus web services using userscripts1 in the Microsoftware magazine2.

Additional talks and presentations are archived on my Speaker Deck profile

Education

B.S. in Computer Engineering, Jeju National University

Relevant coursework: Data Structures, Algorithms, Open Source, Databases, Software Engineering, Programming Languages, etc.

I maintain detailed lecture notes in a GitHub repository

  • Took a long-term leave from university due to full-time employment.

Contact & External Links

E-mail
iam@muhun.kim
Profile
https://frontend.moe/en/about
You can also view this resume at the below:
https://frontend.moe/en/resume
Last print date

This resume can be download as an A4 standard PDF.

  1. Userscripts are JavaScript code snippets that modify the UI and behavior of specific web services; unlike browser extensions, they are typically lightweight and used for small, easy-to-deploy customizations. — Userscript - Wikipedia ↩︎

  2. A Korean IT magazine covering computer programming and related topics, founded in 1983. Publication has been on hiatus since issue 401 (July 2020). — Microsoftware - Korean Wikipedia ↩︎