CV | Hyun-woo Cho

Interests

Engineering AI agents as products, from multi-agent orchestration and streaming agent interfaces to real-time voice agents, and building them end to end across web and mobile with coding agents such as Claude Code and Codex.

Work Experience

Jan 2026 - Present

WIGTN

AI Product Engineer, AI Research & Engineering Company

Running an ongoing PoC with a professional esports team (since Sep 2026): a frame-level video analysis system that classifies why a fighting-game player was hit, built on public 60 fps match footage. Wrote the proposal and roadmap and prototyped hit detection and health bar tracking.
Built the Web Agency sales demo, a career platform with community, company reviews, job postings, and an operations back office, wiring 20 mock-up screens into a working product and vendoring the team's core modules so it builds statically without private registry tokens.
Connected the admin action flow so that only actions passing permission check, step-up re-authentication, and an idempotency key in order reach state and the audit log, with guest, member, and operator role switching to make the three permission gates observable.
Fixed screens breaking on local storage schema changes with row-level merging and a schema version stamp.
Contributed to WIGTN Plugins, the open-source Claude Code plugin: wrote the initial frontend-development plugin (frontend-developer agent, Next.js App Router, React, Tailwind, and testing skills, and an /add-feature command) and overhauled the /screen-spec skill with a grayscale wireframe, a mobile wireframe template, and --interview and --platform options. View details

Feb 2025 - Jun 2026

Soundmind

Manager, MX Team

Built and operated B2B child safety services, a location-tracking app (Odiya) and a parental control app (Mohani), and their unified auth system across React Native apps, admin web, and backend.
Relieved processing bottlenecks and DB load on a location stream of 3,000 to 5,000 records per minute with Redis caching, batch processing, and DB partitioning and indexing. View details
Reduced battery use in the location-tracking app by enabling high-accuracy tracking only during actual movement, using the Activity Recognition API and Android sensors.
Built a React Native guardian app to replace the web-based guardian system and an admin dashboard for monitoring user status and location data, contributing to about 230% revenue growth in the B2B business. View details
Designed FCM-based real-time device control for the parental control app and fixed missed events across Android foreground and background states with state resynchronization and fallback handling. View details
Built parental controls including app usage limits, sleep mode, and content blocking, with Redis-based state caching and per-app usage statistics.
Designed and built a unified auth system across services with role-based policies for guardian and dependent accounts, auth-server load control, blue-green deployment, and integrated metrics and log monitoring. View details
Built a Korean speaking assessment platform for a KOCCA government R&D project, used concurrently by 120 evaluators and 20 graders at Yonsei University, with a staged assessment workflow that prevents state conflicts and duplicate grading, draft saving and state recovery, S3 storage with Wavesurfer.js streaming waveforms, STT-based processing, and rubric-based result analysis. View details

Hackathons

H0: Hack the Zero Stack · Vercel × AWS

OpenSlot: Zero-Oversell Ticketing Infrastructure

B2B ticket on-sale infrastructure that keeps the seat ledger on multi-region Amazon Aurora DSQL and discovery on Aurora PostgreSQL with PostGIS and pgvector, guaranteeing zero oversells when buyers in every region hit the same seats at once. Built the Aurora PostgreSQL discovery plane, restyled the buyer flow to the poster design system, and ran the design QA and E2E pass. Next.js on Vercel.

GitHub Devpost Video

Google Cloud Rapid Agent Hackathon

Custos: Always-On AI Code Review Bot for GitLab

Self-evolving GitLab code review agent in which an ADK triage orchestrator reviews merge requests, sweeps merged code on a schedule, and learns new review skills from real incidents. Built the rule-based checkers for the security, performance, test quality, and team lead reviewer personas with conflict synthesis across findings, and the merge request opt-out rules (draft title, skip label, magic comment).

GitLab Devpost Video

Snowflake AI & Data Hackathon 2026 Korea · 2nd Place, Tech Track

WIGTN FLAKE: Purpose-Driven Neighborhood Intelligence Platform

Location recommendation platform in which an orchestrator assigns purpose-specific expert agents to cross-analyze real estate, foot traffic, card spending, and telecom data on Snowflake Cortex. Built the Cortex analysis pipeline, six-axis region profiling with a three-region comparison mode, and stream-mock Playwright E2E tests for the SSE screens.

Video News

Build with TRAE Seoul · ByteDance · Grand Prize

WIGENT: Multi-Agent Debate Platform for Business Ideas

Multi-agent debate platform in which an orchestrator spawns and retires expert agents around a PM agent and turns the conclusion into a landing page. Built the orchestrator and SSE API, integrated the three parallel tracks, and added Next.js code export.

GitHub

Gemini Live Agent Challenge · Google

TimeLens: Multimodal AI Museum Curator

Multimodal AI curator on the Gemini Live API that recognizes artifacts through the camera, explains them by voice in real time, and generates restoration images. Fixed gaps in TTS playback by switching the audio pipeline to proactive scheduling. Gemini Live API, Google ADK, Firebase, Cloud Run.

GitHub Devpost Video

Cursor Seoul Hackathon 2026 · Round 1

WIGVO: AI Voice Assistant for Phone-Only Services

Voice assistant that collects a request through chat, turns it into a dynamic call prompt, and makes the phone call on the user's behalf to shops that only take reservations by phone. Built the chat front end, login flow, and conversation state management in a four-person, four-hour build. Next.js 16, OpenAI, ElevenLabs Conversational AI, Twilio, Supabase.

GitHub

Publications

Sang-Woo Son, Hyeong-seob Kim^*, Hyeonsang Kim, Hyun-woo Cho, Jinmo Kim

Retrieval-Conditional Parsing Score (RCPS): Choosing Document Parsers by Retrieval, Not by Appearance

Accepted to EMNLP 2026 Industry Track.

* Corresponding author

Hyeong-seob Kim, Sang-Woo Son, Hyun-woo Cho, Hyeonsang Kim, Jinmo Kim

WIGVO: Real-Time Bidirectional Speech Translation over Legacy PSTN Calls via Dual-Session Echo Gating

In Proceedings of ACL 2026 System Demonstrations.

Paper Video

Education

Mar 2016 - Feb 2022

Kwangwoon University

Bachelor's degree in Computer, Information and Communications Engineering, GPA 3.77 / 4.5

Graduation research: a deep learning model that estimates blood pressure from BCG, ECG, and PPG signals for health indicator monitoring.

Honors & Awards

Apr 2026	2nd Place, Tech Track, Snowflake AI & Data Hackathon 2026 Korea Team WIGTN, WIGTN FLAKE
Mar 2026	Grand Prize, Build with TRAE Seoul, ByteDance Team WIGTN, WIGENT
2019	Dean's List School of Computer and Information Engineering, Kwangwoon University