Brian Noh CocomSoftware Engineer

Android / Kotlin

Android developer who owns products end-to-end, from code to Play Store to real users.

Shipped and maintained production Android apps serving ~5,000 users. Work spans Kotlin development, Firebase services, Play Store publishing, analytics, push notifications, and ongoing product lifecycle ownership.

Kotlin Nuxt TypeScript .NET Firebase SQL
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Android Proof

~5,000

App Users

Play Store

Published Apps

5+

Years Android Development

Capabilities

What Android work actually involves.

Beyond coding: Play Store releases, production issue handling, subscription monetization, Firebase integrations, and long-term app maintenance. Real product ownership from shipping through ongoing support.

Core Android Capabilities

Production Android responsibilities beyond coding.

  • Play Store publishing & release management
  • Firebase integrations & push notifications
  • Room/local-first persistence
  • Subscription, AdMob, and in-app monetization
  • Production fixes and long-term maintenance
Play Store Firebase Room DB Monetization Push Notifications

Android

Independent Android Development

Android Developer

Owned complete Android product lifecycle: development, Play Store publishing, Firebase integrations, and multi-year maintenance for apps with real users.

  • Built and shipped Himnario, a production app serving ~5,000 users
  • Managed end-to-end product ownership: development, releases, and maintenance
  • Implemented Firebase services, analytics, notifications, and local persistence
  • Handled production issues and app lifecycle as independent developer
Kotlin Firebase Room DB Play Store

Shipped work

Android products with real users and production maintenance.

Himnario: ~5,000 users, subscriptions, multi-year ownership. Repertoire and Futoshiki: end-to-end product building with workflows and monetization. FlowControl: architecture exploration with modern patterns.

Hymnario Android App screenshot 1
Hymnario Android App screenshot 2
Hymnario Android App screenshot 3
AndroidProduction

Hymnario Android App

Production Android app with ~5,000 users — full product ownership including Play Store publishing, subscription monetization, and multi-year maintenance

Built around a custom MIDI rehearsal engine with guided accompaniment, real-time chord transposition, and offline-first Firebase architecture. OCR-extracted hymn content, synchronized lyric rendering, and multi-channel audio playback shaped the product experience over 6+ years of ownership.

Outcome / Impact

  • Custom MIDI sequencer with multi-channel mixing
  • Offline-first + Firebase multi-service backend
  • Subscription & AdMob monetization
Read case studyView on Google Play

Technical stack

Kotlin Firebase Room DB AdMob Push Notifications
Futoshiki Puzzle App screenshot 1
Futoshiki Puzzle App screenshot 2
Futoshiki Puzzle App screenshot 3
Futoshiki Puzzle App screenshot 4
Futoshiki Puzzle App screenshot 5
AndroidProduction

Futoshiki Puzzle App

Constraint-based puzzle app with explainable solving logic, custom Canvas rendering, and full Play Store ownership

Constraint-based puzzle system with explainable solving logic and 24,000+ curated puzzles. Custom Canvas rendering engine with deterministic validation, immutable state architecture, and Firebase backend. Play Store ownership with Play Billing + AdMob monetization. Modernized with Navigation Component, Crashlytics, and AC-3 constraint engine.

Outcome / Impact

  • Real-time constraint validation engine (row/column/inequality)
  • 24,000+ curated puzzles across structured difficulty tiers
  • Custom Canvas rendering with precise touch handling
Read case studyView on Google Play

Technical stack

Kotlin Android SDK Firebase Play Billing AdMob Crashlytics
Repertoire App screenshot 1
Repertoire App screenshot 2
Repertoire App screenshot 3
Repertoire App screenshot 4
Repertoire App screenshot 5
Repertoire App screenshot 6
AndroidIn Development

Repertoire App

Workflow-focused Android app for music teams — complex domain modeling, personalized singer keys, and local-first sync architecture

Workflow app for music teams handling song libraries, singer assignments, and rehearsal preparation with personalized key transposition. Built with multi-database architecture for data isolation, local-first reliability, and complex domain modeling.

Outcome / Impact

  • Complex domain modeling: songs, artists, albums, singers, personalized key transposition, BPM metadata
  • Multi-group architecture with isolated Room databases per group for data isolation
  • Personalized key transposition: same song, different keys per singer for rehearsal optimization
Read case study

Private repository — architecture details available upon request.

Technical stack

Kotlin Room DB MVVM StateFlow Firebase Auth Firestore
Financial Systems Concept
AndroidConcept

FlowControl

Financial systems architecture exploration — payment scheduling, debt modeling, and future simulation systems

Architecture-first exploration of personal finance tracking systems. Demonstrating domain-driven design for payment schedules, debt modeling, recurring transaction logic, and future payment forecasting with maintainable Android architecture.

Outcome / Impact

  • Payment scheduling and debt modeling for recurring financial transactions
  • Future payment forecasting and simulation systems architecture
  • Domain-driven design for maintainable financial domain logic

Technical stack

Kotlin Room DB Jetpack Compose Coroutines

Android / Kotlin

Need an Android developer with shipped product experience?

I build and maintain Android apps with real users — from Kotlin development and Firebase backends to Play Store publishing and subscription monetization. Focused on product ownership and execution.

Contact meView projects