IT Consulting Review

During the initial mobile app development, frequent developer changes meant that libraries and dependencies were not properly managed for several years. Over time, the Flutter version remained outdated, and libraries in use were no longer supported or had security vulnerabilities. Eventually, we received deployment rejection warnings from app stores, and we were at risk of not being able to update the app normally. The technical debt had accumulated to a point where it could no longer be postponed.

When we asked Hyunjae for help, the first task was to upgrade Flutter to the latest version. This was not simply changing version numbers, but a complex migration that required resolving numerous breaking changes. Hyunjae carefully analyzed the existing codebase, checked library compatibility, and proceeded with migration step by step. Even when unexpected errors occurred, he quickly identified the cause and provided solutions.

Along with the version upgrade, Hyunjae also conducted refactoring to improve the overall app structure. He standardized code that had been written inconsistently by multiple developers, redesigned the architecture, and significantly improved maintainability. In particular, he clearly organized state management and data flow, and structured reusable components to improve future development efficiency. He didn't just solve problems, but created a sustainable codebase for the future.

After the migration and refactoring were completed, the app could be deployed normally again. The deployment rejection warnings were resolved, and libraries were updated to be compatible with the latest Flutter version, solving security issues. Most importantly, Hyunjae documented the work well, so that even if another developer takes over, they can easily understand and continue the work. Thanks to resolving technical debt and establishing a foundation for future management, we can now operate our service with peace of mind.