🥭Mango LabLet's Talk
Available for new projects

I turn your app idea into a
polished, revenue-ready product.

I'm Minho, a React Native engineer with 10+ production apps shipped to the App Store. I handle everything from design to deployment — subscriptions, AI integration, offline-first architecture, and App Store optimization.

Get in touch
React Native
·
Expo
·
TypeScript
·
AI Integration
·
Subscriptions / Payments
·
Offline-first
10+Apps Shipped
8+Years React Native
iOS & AndroidCross-Platform
10+Apps with Subscriptions

Selected Work

Chingu screenshot

Chingu

iOS

AI-powered Korean language learning app. Chat with AI companions through text and voice to master Korean naturally.

Role

Full Stack Developer

What I shipped

  • Built conversational AI system with 8 unique companion personalities
  • Integrated Whisper for speech-to-text and ElevenLabs for natural Korean voice generation
  • Implemented real-time grammar corrections with inline explanations
  • Built spaced repetition flashcard system from conversation context
  • Shipped subscription monetization with RevenueCat

Key features

  • Text & voice chat with AI companions
  • Real-time grammar corrections
  • Spaced repetition flashcards
  • Adaptive difficulty (beginner to TOPIK prep)
  • Relationship progression system

Tech Stack

React NativeExpoTypeScriptOpenAIWhisperElevenLabsRevenueCat
App StoreWebsite
NomadWallet screenshot

NomadWallet

iOS

Expense tracker for digital nomads managing multiple currencies while traveling.

Role

Full Stack Developer

What I shipped

  • Built multi-currency expense tracking with live exchange rates
  • Implemented offline-first architecture with cloud sync
  • Designed and shipped end-to-end from concept to App Store

Key features

  • Multi-currency support with 150+ currencies
  • Trip-based expense organization
  • Charts and spending insights

Tech Stack

React NativeExpoTypeScriptSupabase
App StoreWebsite
Corgi screenshot

Corgi

iOS

AI-powered journaling and mood tracking that helps you reflect and care for your mind.

Role

Full Stack Developer

What I shipped

  • Integrated OpenAI for conversational journaling experience
  • Built mood tracking with visual insights and trends
  • Implemented subscription system with RevenueCat

Key features

  • AI-powered journal conversations
  • Mood tracking and analytics
  • Daily reflection prompts

Tech Stack

React NativeExpoTypeScriptOpenAIRevenueCat
App Store
ReelCarousel screenshot

ReelCarousel

Web

Create stunning carousel slideshows for Instagram, TikTok, and LinkedIn in minutes. AI-powered content generation, beautiful templates, and easy export.

Role

Full Stack Developer

What I shipped

  • Built AI-powered carousel generator with OpenAI integration
  • Designed template library with one-click slideshow creation
  • Developed slide editor with real-time text and style customization
  • Implemented TikTok auto-posting with scheduling system
  • Integrated Reddit API for content sourcing and inspiration

Key features

  • AI content generation from prompts
  • Customizable templates and themes
  • Scheduled auto-posting to TikTok

Tech Stack

Next.jsTypeScriptSupabaseOpenAIReddit API
Website
Restart screenshot

Restart

Web

Exclusive and ad-free gaming news, previews, features, and reviews.

Role

Fullstack Developer

What I shipped

  • Built and maintain gaming editorial platform backed by Walmart
  • Developed custom CMS workflows to streamline editor experience
  • Implemented article publishing system with rich media support
  • Managed Sanity CMS infrastructure and content modeling
  • Integrated ad placements and analytics tracking across the site

Key features

  • Editorial content management
  • Game reviews and previews
  • SEO-optimized article pages

Tech Stack

Next.jsTypeScriptReactSanity CMS
Website
Budgy screenshot

Budgy

iOS

Simple expense and income tracking with smart budgeting features for everyday use.

Role

Full Stack Developer

What I shipped

  • Designed minimal, distraction-free budgeting interface
  • Built category-based expense tracking with custom budgets
  • Shipped to App Store with 0 to launch in under 4 weeks

Tech Stack

React NativeExpoTypeScript
App Store
TripWise screenshot

TripWise

iOSAndroid

Smart spending tracker for travelers. Track expenses, split costs, stay on budget.

Role

React Native Developer

What I shipped

  • Built cross-platform app for iOS and Android simultaneously
  • Implemented expense splitting for group travel
  • Designed trip timeline with daily spending breakdowns

Key features

  • Group expense splitting
  • Trip-based organization
  • Multi-currency support

Tech Stack

React NativeExpoTypeScriptFirebase
App StorePlay Store
Shackpets screenshot

Shackpets

iOSAndroid

Pet battle app for Shacknews. Users compete in daily cuteness battles and win prizes.

Role

Lead React Native Engineer

What I shipped

  • Built gamified pet battle system on Cortex engine
  • Implemented daily voting mechanics and leaderboards
  • Shipped iOS and Android apps with push notifications
  • Integrated prize fulfillment and user reward system

Key features

  • Daily pet battle tournaments
  • Community voting system
  • Prize and reward mechanics

Tech Stack

React NativeTypeScriptCortex Engine
App StorePlay Store
Laundry Homes screenshot

Laundry Homes

iOSAndroid

O2O laundry service app. Customers book pickup, washing, and delivery seamlessly.

Role

React Native Developer

What I shipped

  • Built customer-facing booking and order tracking app
  • Developed factory staff admin app for order management
  • Integrated real-time location tracking for pickup/delivery
  • Implemented payment processing and order history

Key features

  • Real-time order tracking
  • Scheduled pickup/delivery
  • In-app payment processing

Tech Stack

React NativeTypeScriptFirebaseGoogle Maps
App StorePlay Store

How I Work

01

Discovery

We discuss your idea, goals, and target users. I help scope the MVP so you ship fast without cutting corners.

02

Design & Build

I design the UI, build the app in React Native, and share progress weekly. You stay in the loop at every step.

03

Launch

I handle App Store submission, review guidelines, and deployment. Your app goes live with zero headaches.

04

Support

Post-launch bug fixes, feature updates, and performance monitoring. I don't disappear after launch.

What I Do

Mobile Development

Cross-platform iOS and Android apps with React Native. Native performance, single codebase, fast iteration.

AI Integration

OpenAI, Whisper, ElevenLabs, and more. I build AI-powered features that feel native — chat, voice, and smart UX.

Monetization

In-app purchases, subscriptions with RevenueCat, and payment integration that actually converts.

End-to-End Delivery

From wireframes to App Store launch. I handle design, development, deployment, and post-launch support.

Ready to build your app?

Tell me about your project and I'll get back to you within 24 hours.

Send an email