Andreas Balevik focused on backend development in Kotlin, working on the navikt/pensjon-etterlatte-felles repository. During the period, he addressed technical debt by simplifying the data model, specifically removing the redundant mottattDato field from the Inntektsjustering data class. This change aligned the domain model with current requirements and reduced unnecessary data handling, which helps minimize maintenance overhead and the risk of data inconsistencies across services. Andreas ensured downstream compatibility by validating the impact of the change. While the scope was limited to a single bug fix, the work demonstrated careful attention to code quality and maintainability within the backend system.