A Junior Android Developer's Adjustment Story After Joining Kakaopay

The onboarding of Kakaopay's Android development team proceeds as a 'warm-up' process to review knowledge and get familiar with the app structure before being put into actual work.

Through the onboarding study, they learn Kotlin, Coroutine, Architecture, DI, Testing, and check the Delegation pattern and error handling approach using runCatching that are actually used in the Kakaopay app.

Afterward, they refactor the hiring assignment into a Clean Architecture-based MVVM structure, experiencing testable structure design through DI and build system migration based on kts.

In actual work, they are assigned to the Account Service targeting 37 million users, where they are responsible for developing the Account SDK and resolving CS issues.

They also participate in resolving technical debt and improving productivity through guild activities such as Housekeeping Day, including introducing Gradle Version Catalog.