Donggi Sun

Developed a Kotlin/Jetpack Compose sales consultation application and transitioned it into live operation. Currently serving as the primary Android engineer for ongoing enhancement and incident response.

Consolidated existing Android projects and applied security policies and mobile device management (MDM) features for a government agriculture and fisheries project.

Developed and maintained operational Android tablet applications for logistics and field use, including GPS, barcode scanning, and TMS/WMS interfaces.

Long-term maintenance and enhancement of three consumer Android applications, handling OS upgrades, device compatibility, and defect resolution.

Implemented OMA-based bidirectional communication between Android devices and USIM using TelephonyManager and APDU commands.

Improved stability and performance of an Android education application by analyzing memory leaks and resolving defects.

Developed features and UI for a Java-based Android social networking application using local SQLite data and HTTP integration.

Renewed GUI and updated code for Android OS compatibility for an authentication application, maintaining certificate-related modules.

Developed WebView-based features and JavaScript interface for a hybrid app providing access to Samsung.com services, integrating login, authentication, and payment modules.

Analyzed voice-recognition SDKs and built demonstration/plugin functionality for set-top boxes.

Led initial architecture and developed core delivery workflows for a driver-facing Android app supporting GPS-based delivery, including route suggestions and electronic signatures.

Analyzed and reworked an existing Android product-management application for field operations, implementing offline data storage and synchronization.

Coordinated requirements and developed GPS-based patrol-location tracking and record history for field staff.

Developed GPS/gyroscope-based activity tracking for walking, running, and cycling, implementing route recording and sensor data processing.

Designed and implemented lock-screen UI and MVC-based application flows for utility and security apps, including Bluetooth integration.

Implemented community features, social sign-in, and push notifications for a fitness social networking app.

Renewed and enhanced Android TV VOD, search, and player interfaces, updating detail pages and improving interactions.

Developed a web/native hybrid app for e-commerce functionality using Java and HTTP communication, with SQLite data support.

Implemented transmission of operation orders and command/report workflows for a military operations app, developing reliable data-handling logic.

Built Java-based Bluetooth connection and communication features between Android devices and external hardware.

Created local database storage and restaurant search by region, building review submission and sharing functionality.

Contributed to technical stack and architecture decisions for a hybrid social networking app, using WebView to integrate native and web content.

Created inventory lookup and product verification for store-level stock checking, designing screens around local data and server communication.

Implemented location tracking, map/display flows, and location sharing, building friend recommendations and chat-based communication.

Implemented login, course listings, and video lecture access for a mobile learning app, including tracking of video viewing records.

Developed and maintained Domino Notes groupware functions and applications, providing user support and delivering feature updates.

Managed enterprise Domino Notes groupware servers and user accounts, supporting incidents, backups, and feature improvements.

Earned an associate-level credential in Information Processing in February 2004.