Learning & AI
Hengo Learning
A Korean-learning workspace for engineers, with spaced repetition, workplace practice, interview preparation, and authenticated AI coaching.
- Next.js 16
- React 19
- Supabase
- Vercel AI SDK
- OpenAI
Personal software ecosystem
My Projects. One Space.
H-Space is my personal software workspace and engineering portfolio. It brings together the real applications I build for everyday learning, finance, AI, productivity, and software development.
LearningFinanceAI engineeringProductivityDevelopment
AI Coach
● Online now
🔥7
How do I say "I finished the deployment" in Korean?
배포 완료했습니다 ✓ — Natural & professional. 배포 = deployment, 완료 = completed.
More formal for team lead?
배포 완료하였습니다 — Use with 팀장님. Sounds polished and respectful in standups.
Ask in English...
Connected work
My Apps
Real applications I use, maintain, and discuss in engineering interviews. Each project solves a different problem while documenting the product and technical decisions behind it.
Personal accounts
H-Vault
A private directory of which email or username belongs to each service, with categories, favorites, and search. Passwords stay in Bitwarden — H-Vault stores account information only.
- Next.js 16
- Supabase RLS
- TanStack Query
- Zod
Full-stack commerce
H-Phsar Commerce
A B2B marketplace with buyer, supplier, and admin experiences backed by a secured order and inventory API.
- Next.js 16
- Spring Boot
- Spring Security
- MyBatis
- PostgreSQL
Engineering portfolio
Developer Portfolio
A recruiter-focused portfolio with project case studies, a backend learning lab, resume views, and a retrieval-grounded AI assistant.
- Next.js 16
- React 19
- TypeScript
- Supabase
- OpenAI
Purpose and architecture
About H-Space
H-Space is my personal software ecosystem: a place to use the products I build, connect the work behind them, and present concrete engineering decisions during portfolio reviews and job interviews.
Product workspace
H-Space connects learning, finance, AI engineering, productivity, and development projects in one portfolio-ready home.
Application architecture
The app uses Next.js 16, React 19, and TypeScript, with Supabase authentication, Postgres data protected by RLS, and a domain-based API layer.
AI engineering
Authenticated Next.js route handlers use the Vercel AI SDK and OpenAI for coaching, structured feedback, speech, and retrieval-backed experiences.
Hengo Learning
Hengo Learning stays focused on workplace Korean.
From an AI coach and workplace scenarios to developer vocabulary, listening, reading, and interview prep — Hengo Learning covers the Korean you actually use on the job as one dedicated part of H-Space.
AI Korean Coach
Ask anything in English and get natural Korean back — grammar, politeness levels, and real workplace phrasing, 24/7.
Learn more
Workplace Scenarios
Role-play standups, code reviews, and team meetings — the situations you actually face on a Korean dev team.
Learn more
Developer Vocabulary
Spaced-repetition decks with audio, tuned to technical and on-the-job terms so the right word sticks.
Learn more
Foundations
Build from Hangul up — grammar and core patterns explained for engineers who like things structured.
Learn more
Listening & Reading
Train your ear with audio drills and read bite-size passages graded to your level.
Learn more
Exam & Interview Prep
Rehearse Korean tech interviews and exam-style questions with instant, actionable feedback.
Learn more
Daily Phrase & Dev Notes
A fresh phrase every day, plus your own notebook to save words and corrections as you go.
Learn more
Goals & Dashboard
Set learning goals, break them into daily to-dos, and keep your streak on a focused dashboard.
Learn more
How it works
One loop, from real work to fluency.
Do real work in Korean, get AI feedback, and let everything sync between your phone and PC — Hengo Learning turns your mistakes into personalized practice.
Step 1
Do real work
Chat with the AI coach, run workplace scenarios, and decode real messages from your Korean team.
Step 2
Get AI feedback
Instant corrections, tone guidance, and natural alternatives for everything you write and say.
Step 3
Everything syncs
One cloud for your data and AI — scripting, goals, and progress stay in sync between phone and PC.
Step 4
Personalized practice
Your mistakes become targeted drills and spaced-repetition reviews, so weak spots get fixed fast.
Made for engineers, not tourists.
Learn the Korean you'll actually use
Standup updates, code-review comments, and meeting phrases — not phrasebook small talk.
An AI coach that gets context
Ask in English, get natural Korean back with grammar, politeness levels, and examples — anytime.
Stay consistent with goals & streaks
Set learning goals, drill vocab with spaced repetition, and keep your streak on a focused dashboard.
This week
Daily goal: 87%
🔥12-day streak
배포deployment
회의록meeting notes
마감일deadline
Ready to speak Korean at work?
Practice with an AI coach, master developer vocabulary, and rehearse real workplace scenarios. Start free today, no card required.