Worked on enhancing JSON serialization robustness in the microsoft/kiota-java repository by developing a DefaultGsonBuilder and implementing a suite of Gson TypeAdapters for handling dates, times, byte arrays, and other complex types. This approach enabled customizable and reliable serialization and deserialization, addressing the challenges of varied API schemas and reducing runtime errors. Leveraging Java, GSON, and advanced serialization techniques, the work improved client interoperability and standardized serialization customization across the codebase. The changes contributed to more reliable code generation outputs, lowered maintenance costs for API clients, and facilitated faster onboarding for new API integrations, reflecting thoughtful engineering depth.