DEVNAMU
/ Nam Woo-hyun
DEVNAMU · About

I turn understood problems into operable products.

I’m a frontend-focused full-stack developer who connects the interface people use with the data, APIs, and operations behind it.
Frontend-focused full-stack developer
Portrait of Nam Woo-hyun
0+years in product
0product domains
0working languages
Working with AI

I use AI to understand faster and verify the result end to end

I use AI not simply as a code generator, but as an engineering tool for understanding problems faster and reducing implementation uncertainty. I apply it to codebase analysis, change-impact discovery, refactoring alternatives, and test-scenario planning, then verify the result through types, tests, and the actual runtime environment while retaining responsibility for the final decision.On C&Net's KCSC digital construction standards system, I worked with a complex hierarchy spanning facilities, review items, review elements, and variables, together with Java API integrations. I used AI development tools to explore related code and change points and to review refactoring directions and edge cases. In the implementation, I separated server and editing state with TanStack Query and Zustand, verified permissions, hierarchical editing, and data transformation with Jest and React Testing Library, and supported delivery through Docker and Jenkins.In my personal project Jango, I turned AI into a product capability that accounts for both user value and operational requirements. Inventory snapshots and expiry dates feed the OpenAI Responses API to recommend recipes that prioritize expiring ingredients, with consent, withdrawal, history deletion, and per-model cost observability built into the flow. I connected ML Kit OCR and bulk photo intake, shared refrigerators, Jango Plus billing and restoration, NestJS APIs, and a Next.js admin in one monorepo, then released version 1.4.0 on both the App Store and Google Play after 885 automated tests across 147 files passed.

Career Timeline

C&Net

Associate · Full-stack Developer (Frontend-focused)
Dec 2025 – PresentSeoul
KCSC digital construction standards pilot support system
BIMS web and application development
  • Built and advanced the KCSC digital construction standards frontend for documents, reviews, and variables.
  • Structured the facility–review item–review element–variable hierarchy with trees, tables, multi-panel layouts, and type-aware editing flows.
  • Separated Java API server state from local editing and UI state with TanStack Query and Zustand, synchronizing screens after save, delete, and validation operations.
  • Built BIMS admin screens for bus, route, and operations data, integrated with Spring Boot APIs.
  • Supported regression checks for key business screens and the delivery flow with Jest, React Testing Library, and Docker and Jenkins-based deployment.

Get&Show

Associate · Full-stack Developer
May 2025 – Dec 2025 · 8 monthsSeoul
In-house subscription web and app platform
  • Built user screens connecting authentication, product and service information, and subscription state with Next.js App Router and TypeScript.
  • Implemented an SSR and SEO-oriented page structure with server rendering and metadata configuration.
  • Developed authentication, product, and subscription APIs and business logic with NestJS, and participated in PostgreSQL modeling and table design.
  • Clarified the processing flow between frontend screens, APIs, and the database and improved the shared integration structure.
  • Built responsive UI with Tailwind CSS and a Docker-based development environment.

KMIS Co., Ltd.

Associate · Frontend Developer
May 2023 – Jan 2025 · 1 year 9 monthsIncheon
GIS-based facility lookup web application
  • Owned facility lookup and detail screens for a GIS web application built with React, Next.js, and TypeScript.
  • Connected location data with map markers, popups, lists, and detail panels to implement a facility exploration flow.
  • Transformed API responses for the map and screen models and kept facility selection state consistent across views.
  • Built responsive UI and management screens with Tailwind CSS and participated in feature-level issue resolution.
  • Contributed to the development and operational rollout of a system delivered to Korea Water Resources Corporation.
How I Work

Professional Summary

01 · Frame the problemI am a frontend-focused full-stack developer with over three years of experience turning complex domains into tree, table, multi-panel, and map-based business UIs while connecting them to APIs, admin tools, and delivery with React and Next.js.
02 · Connect the systemI separate server and UI state with TanStack Query and Zustand, and have designed data flows across the interface, NestJS and PostgreSQL development, and Spring Boot and Java API integrations.
03 · Design for operationsThrough a public-sector GIS delivery and a digital construction standards pilot, I have considered operational requirements including permissions, authentication edge cases, file handling, testing, and delivery environments.
Technical Skills

Capabilities across the product lifecycle

Frontend

Core
React
Next.js
TypeScript
JavaScript
HTML5
CSS3
Tailwind CSS
Mantine

State & Data

Core
TanStack Query
Redux
Zustand
React Hook Form
Zod
PostgreSQL
MySQL
Prisma

Backend

Supporting
NestJS
Node.js
Spring Boot
Java
REST API

Mobile

Supporting
React Native
Expo
Expo Router
ML Kit

Quality & Delivery

Supporting
Jest
React Testing Library
Vitest
Docker
Jenkins
Railway
EAS
Sentry
Git
Education

Education, training, and credentials

Education

01
  • Korea National Open UniversityComputer Science · Transfer/Graduated2023.01 – 2025.08
  • Academic Credit Bank SystemComputer Networks · Completed · Associate-degree-equivalent credit2021.04 – 2023.01
  • Incheon Hyosung High SchoolNatural Sciences · Graduated2012.03 – 2015.01

Training

02
  • Ezen Academy Computer InstituteJava Web Development Programming · 800 hours2022.09.03 – 2023.01.26

Certifications · Language Tests

03
  • Engineer Information ProcessingSep 2025 · Passed · HRD Korea
  • SQL Developer (SQLD)Sep 2024 · Passed · Korea Data Agency
  • Network Administrator Level 2Dec 2021 · Passed · ICQA
  • TOEICOct 2025 · 835
  • TOEIC Speaking TestSep 2025 · 120 · Intermediate Mid 2

Interests

  • 01Connecting frontend and backend through a clear understanding of service architecture and data flow
  • 02Development that balances user experience, service reliability, and maintainability
  • 03Using AI development tools for code analysis, refactoring, documentation, and productivity
Email

Tell me about the product you’re building

If you have a role or collaboration in mind, I’d be glad to hear from you.
skadngus14@naver.com