As lead engineer for the on-device LLM mobile app 'LLAMI App', I designed and implemented a WebView↔Native bridge architecture. Built on-device STT/TTS and image processing pipelines using ONNX Runtime, OpenCV, and MMKV, developed an AI-powered dashboard, and configured Supabase-based DB integration. For the web-based robot control 'LLAMI Robotics', I implemented UDP control protocol for DeepRobotics Lite3 and WebRTC low-latency streaming, and developed SLAM mapping UI and path planning operation UI. Independently developed the in-browser AI coding agent 'Curiosity', implementing a WebContainer+Monaco-based real-time code execution environment.

Developed a remote education platform using educational hardware. Built real-time chat and video conferencing solutions using WebRTC with Next.js and MobX. Constructed backend with Supabase (PostgreSQL) and Nest.js, deploying infrastructure on Railway. Participated in ESP-32-based hardware firmware development implementing web-based remote updates, and implemented installation-free communication between smart educational hardware and web browsers using Web Bluetooth technology.

Participated in developing a web-based 3D slicer program and platform. Developed components using React, SCSS (BEM), and MobX, implementing interaction-based Vector Animation. Developed backend using Nest.js, Prisma ORM, and TypeScript, deploying with AWS Beanstalk, Aurora DB, and Railway. Ported Electron-implemented programs to work on Intel Mac, Silicon Mac, and Linux, and built a real-time update deployment system for Electron apps by configuring a Redis-based Pub/Sub server.

Joined the web automation team to develop scraping modules used in the identity verification process for Nonghyup Bank, Shinhan Bank, and Industrial Bank of Korea for the Toss app.

Participated in migrating Aha's knowledge-sharing platform service from Nuxt.js version 2 to version 3. Created and applied an open-source state management module called vue-state-store to the project. Participated in Next.js-based UI development for Aha Connects, an online consultation service, and was responsible for connecting the Sendbird-based chat system on the frontend.

Took full charge of hybrid app development and release process for Android and iOS. Developed an app that remotely operates sports EMS devices using BLE communication. Participated in configuring communication between hotel fire detectors and servers and building an administrator dashboard page. Developed a communication program between web browsers and POS receipt printers in a store order management system. Worked on crawling real-time stock information from the web and displaying it in real-time within the app using the TradingView library.