- Refactored the Flutter-based Auto Pay Station software, employing BLoC and Clean Architecture principles, to enhance readability, maintainability, and cross-platform compatibility (Windows, Android, macOS).- Developed Dart libraries to facilitate serial communication with credit card readers and receipt printers.- Created a Dart library to handle credit card transactions in compliance with the Credit Card Terminal Security Standard established by the Credit Finance Association of Korea.

- Optimized log/data uploader to prevent crashes under tight resource limits, eliminating related issues on fields, and provided standard operating procedures for recovering impacted robots without data loss.- Implemented user behavior tracking on the robot’s touchscreen web app for use in user behavior analysis by product managers and developers using Google Analytics and Google BigQuery.- Participated in designing process of a distributed message queue system using Google Cloud Platform, RabbitMQ and Kubernetes to meet the high availability requirements, implemented cluster monitoring and incident alert system.- Problem solving in multiple areas such as React based web applications, Kubernetes based distributed system, robot software build system, data visualization using Looker, and Salesforce Apex.

- Gained experience working on a platform with 350K+ monthly active users as part of an agile Scrum team.- Successfully increased OOM-free sessions by 20% through the identification and elimination of memory leaks.- Developed reactive application user interfaces based on the MVVM pattern, utilizing UIKit and RxSwift.- Established a CI/CD pipeline using Bitrise to automate application builds and App Store Connect binary uploads.- Demonstrated the ability to rapidly acquire and apply emerging technologies such as Flutter and iOS App Clips to fast-paced proof-of-concept projects.