Frontend Developer

Seungil Oh
okuma

Designing frontend with React, Next.js, and Svelte,
a 7-year full-stack developer who handles Node.js backend too.

View ProjectsContact Me
GitHubEmail

— Numbers

0+

yrs exp

From 2019 to present

0+

projects

Finance · Trading · SaaS · Games

0+

Tech stack

Frontend · Backend · DevOps

0%

On-time delivery

Every project delivered on schedule

About

I design and build
what matters.

Frontend is my main domain, but I don't step back when servers and DBs need to be built from scratch. I design UI components, integrate APIs, and implement backend logic end-to-end when needed.

Over 7 years I've worked on financial platforms, trading systems, app services, and corporate sites. Currently I mainly use Next.js and Svelte, focused on writing stronger code with TypeScript.

I strive to deliver both pixel-perfect UI and quality code — never sacrificing one for the other.

7+
yrs exp
15+
projects
1990
born
Frontend / Full-stack Developerc8c8c81828@gmail.com
Current interests
Three.js WebGLAI integrationGame developmentPerformance optimizationFull-stack
Tools I use
VS CodeCursorFigmaVercelNeon DBGitHub
Skills

Like the depths of the ocean,
skills built over time

From surface to deep — technologies at every depth.

— Skill Cloud

Publishing
HTML5CSS3SCSSTailwind CSSBootstrapSemantic UIWeb Components

tap to see levels

Frontend
JavaScriptTypeScriptReactNext.jsSveltejQueryEJSPixiJS

tap to see levels

Backend
Node.jsExpressJavaSpring BootGoPythonPHPREST API

tap to see levels

Database
PostgreSQLMySQLMongoDB

tap to see levels

Dev Tools
GitGitHubGitLabWebpackVite

tap to see levels

Design & PM
FigmaZeplinAdobe PhotoshopConfluenceJiraRedmine

tap to see levels

— Skill Overview

Frontend95%Backend75%UI/UX80%DevOps60%Game Dev70%Database72%
95
75
80
60
70
72

— Core Proficiency

React / Next.js
92%
TypeScript
88%
TailwindCSS
92%
Node.js
85%
PostgreSQL
82%
Git / GitHub
89%

— Always learning something new —

Career

Career timeline
Career History

2025.12 — PresentWork

Quantum-AI

Frontend Developer

  • ▸Frontend development
  • ▸Frontend architecture design and implementation
  • ▸UI/UX planning and markup
Next.jsTypeScriptReactTailwind CSS

Taking on frontend architecture from the ground up, establishing conventions with Next.js and TypeScript.

2020.05 — 2025.12Work

Softwiz Inc.

Web team / Assistant Manager

  • ▸Built a Next.js-based brand site (BABA OPTION)
  • ▸Developed a Svelte + Web Components CRM
  • ▸Built a PixiJS-based trading UI
  • ▸Developed an internal management system with MySQL
HTML5CSS3JavaScriptSveltePixiJSMySQL

Picked the tool to fit the situation — Next.js for SSR-heavy brand sites, framework-agnostic Web Components for repeated admin UI, and PixiJS canvas rendering for screens updating in real time.

2018.12 — 2020.02Work

SmileDay

Web dev team / Staff

  • ▸Agency outsourced markup work
  • ▸Built responsive web UIs
  • ▸jQuery-based interactions and Gnuboard tuning
HTML5CSS3JavaScriptjQueryPHP

Working across many freelance projects built the habit of writing semantic markup that holds up cross-browser and stays accessible.

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Contact

Let's build
together.

c8c8c81828@gmail.com

Project collaboration, freelance work, or just a friendly hello. I'll respond quickly.

Emailc8c8c81828@gmail.com
Phone050-6679-1577
HoursWeekdays 9:00 – 18:00
GitHub