Android Developer · Yugen Tech
Building apps people actually want to use — clean architecture, no ads, no compromises.
I build Android apps with Kotlin and Jetpack Compose, following Clean Architecture and MVVM. I care about craft — readable code, thoughtful UX, and shipping things that hold up at scale.
Two of my apps are live on the Play Store under Yugen Tech, my indie label. Both are completely free, no ads, no paywalls. One of them has 2,500+ users and a 4.9★ rating — grown entirely through organic Play Store discovery, no marketing spend.
I'm currently interning at Amatyaa, building a voice-driven CRM for real estate field agents in Kotlin Multiplatform + Compose Multiplatform.
Free · No ads · Open source · 2,500+ users · 4.9★ on Play Store
A Pomodoro timer built around one idea: stay focused without friction. Material You dynamic theming, ambient sounds with adaptive audio ducking, a GitHub-style focus heatmap, session analytics, and OLED black mode — all free, forever.
What started as a portfolio project quietly became something people rely on daily. It's grown to 2,500+ sign-ups across the US, France, Germany, Vietnam, the Philippines, and more — entirely through Play Store search.
Stack: Kotlin Jetpack Compose Material 3 Firebase Auth Firestore Room MVVM Clean Architecture Koin
Free tier · Pro subscription · 150+ users · Live on Play Store
An EPUB reader powered by Aira — an on-device AI assistant that actually reads your book and answers questions grounded in the text, not the internet. Built on a hybrid RAG pipeline: BGE semantic embeddings (ONNX Runtime, int8 quantized) + FTS4 keyword search, merged via Reciprocal Rank Fusion. Supports 70,000+ classics via Project Gutenberg and Standard Ebooks.
Stack: Kotlin Jetpack Compose (Material 3 Expressive) Readium EPUB SDK ONNX Runtime Firebase (Auth · Firestore · Cloud Functions) Gemini 2.5 Flash Room + FTS4 Ktor Koin Multi-Module Clean Architecture
These are smaller apps I built while learning the stack. Each one introduced a new concept — API integration, local persistence, real-time sync. They're not polished products but they're honest work.
| Project | What it is | Key tech |
|---|---|---|
| Kaizen | Habit tracking & self-improvement | Kotlin · Compose · Firebase · Ktor · Koin |
| Ryori | Recipe discovery | Kotlin · Compose · Retrofit · Dagger Hilt · Moshi |
| Tenki | Minimalist weather app | Kotlin · Compose · Retrofit · Dagger Hilt |
| Shuki | Offline notes | Kotlin · Compose · Room |
Language Kotlin
UI Jetpack Compose · Material 3 · Material 3 Expressive
Architecture MVVM · Clean Architecture · Multi-Module
DI Koin · Dagger Hilt
Networking Ktor · Retrofit
Local storage Room · FTS4 · DataStore
Backend Firebase (Auth · Firestore · Cloud Functions · Storage)
AI / ML Gemini 2.5 Flash · ONNX Runtime · BGE Embeddings
Cross-platform Kotlin Multiplatform · Compose Multiplatform
Version control Git
"Crafting elegant solutions through clean architecture and continuous improvement"