Byeonghee Oh

Cross Platform Developer

  • User experience first
  • Immersive interfaces across mobile & web
  • Precise design, optimized code
  • Kotlin & Rust native dev with Flutter integration
3 years Web · 4 years Mobile
Mobile
FlutterReact NativeKotlinJetpack Compose
Web
ReactNext.jsVueNuxtTypeScript
State
ZustandTanStack Query

Open Source Packages

High-performance Flutter packages I developed and published on pub.dev

🚀

mobile_rag_engine

v0.3.9

High-performance On-Device RAG Engine for Flutter. Run semantic search completely offline.

RustFlutter FFIONNX RuntimeHNSWSQLite
⚙️

rag_engine_flutter

v0.3.0

Native Rust FFI plugin for mobile_rag_engine. 10-100x faster tokenization than pure Dart.

Rustflutter_rust_bridgecargokitHuggingFace Tokenizers

Selected Projects

TABLET

FIET Fitness Trainer

A trainer-only app for FIET Fitness Center. Provides member management, workout program design, diet management, and weight data tracking in a tablet-optimized interface.

FlutterDartFirebase
APP

FIET Fitness

A fitness center app by an AI health company. Syncs with trainers to view customized workout programs and diet plans, and tracks progress.

FlutterDartFirebase
APP

Local Mobile RAG Gemma

Implemented a mobile RAG engine that runs fast on local devices. Uses Gemma 3n to store models locally and provides answers to user questions.

FlutterRustONNX Runtime
WEB

Motgo Restaurant Voting

A web service that automatically fetches restaurant info from Naver Map URLs, allowing friends to vote together. Provides real-time voting status and result analysis.

Next.jsTypeScriptTailwind CSS
APP

HaruCheck

A health management app that records daily workout/diet certifications and provides AI weekly reports using Google VertexAI (Gemini). Supports calendar-based tracking and interactive data visualization.

FlutterFirebaseFirestore
APP

Weedool (TuringBio)

A digital therapy-oriented service using Behavioral Activation (BA) techniques. Provides emotion selection, BA recommendations, status monitoring, and counseling center information.

FlutterRiverpodGoRouter