# Jihoon Lim

**CTO / Co-Founder** — Seoul, South Korea

> Software engineer with 5+ years of experience building high-performance web products and developer tooling. Co-founder and CTO of Student Machines, with a background spanning fintech, design tooling, and developer experience.

## Links

- LinkedIn: https://linkedin.com/in/jihoon-lim-b441b81b5
- toss.im: https://toss.im

## Experience

### Founding Engineer, Pensive (2026-06 – present)
San Francisco Bay Area

### Founder, Stealth (2025-09 – 2026-03)
Seoul, South Korea

### CTO / Co-Founder, Student Machines (2025-08 – present)
San Francisco, CA / Seoul, South Korea · Co-founding and leading technical direction for an early-stage startup building developer tooling and web products.

### Frontend UX Engineer, Viva Republica (Toss) (2021-12 – 2025-08)
Seoul, South Korea · Built DEUS, a DOM-based design editor, and led technical architecture across design components, UI systems, and code generation. Developed use-funnel, an internal library adopted by 100+ engineers that became the open-source @toss/use-funnel. Shipped multiple web products including Homeloan Silo for mortgage comparison and lending, Toss News, and seasonal donation features.

### Frontend Engineering Lead, 지엔터프라이즈(비즈넵) (2020-06 – 2021-12)
Seoul, South Korea · Led the Web Frontend Chapter, establishing technical standards and overseeing migration from Angular to React. Introduced Micro-Frontends Architecture using Webpack 5 Module Federation, reducing build times and operational costs. Developed and maintained products with Angular, Ionic 5, RxJS, and GraphQL.

## Education

### 학사 in 소프트웨어학부, Chung-Ang University (2019-03 – 2027-03)
GPA: 3.97/4.5. Admitted as top student in the early admissions process.

## Projects

### DEUS
DOM-based design editor replacing legacy Framer tooling · Built and led technical decision-making for a production design editor handling design components, prototypes, UI architecture, migration scripts, canvas rendering, ESM resolution, and streaming JSON. Rebuilt the Code Generator that transforms designs into production-ready React, iOS, and Android code.

### use-funnel
Internal frontend library for building and managing application flows · Built and released as open-source @toss/use-funnel. Simplifies building and managing application flows across the organization.

### Homeloan Silo
Web product for mortgage comparison and lending · Developed web product enabling users to compare mortgage interest rates and terms across financial institutions and apply for loans directly.

### Micro-Frontends Architecture
Webpack 5 Module Federation implementation · Introduced Micro-Frontends Architecture using Webpack 5 Module Federation across web products. Presented findings at FEConf 2021.

### Collaborative Learning Web Application
Machine learning-based learning platform · Developed a machine learning-based collaborative learning web application using TensorFlow.js and WebSocket to analyze user engagement and evaluate learning effectiveness.

## Skills

JavaScript, React, Angular, React.js, TypeScript, 반응형 웹 디자인, 자바스크립트, HTML5, Git, Java, C, Next.js, MobX, Recoil, XState, Ionic 5, RxJS, Webpack, Rollup, ESBuild, Webpack 5 Module Federation, GraphQL, WebSocket, TensorFlow.js, Design Tooling, Code Generation, Micro-Frontends, Web Architecture

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Source: https://saywise.com/hoonskyn9 (last modified 2026-07-16T05:51:54.229Z)