Worked on the vaadin/flow repository to enhance the reliability of array serialization and deserialization in Java applications. Addressed a critical bug in the JacksonSerializer by replacing ArrayNode.set with ArrayNode.add, which resolved an IndexOutOfBoundsException during array serialization. Extended the solution by implementing support for deserializing JSON arrays back into Java arrays, ensuring round-trip data integrity. Focused on improving stability for client integrations and server-side data flows that depend on Jackson-based serialization. Utilized Java, deserialization, and unit testing skills to deliver targeted changes, resulting in improved code quality and maintainability for array handling within the Vaadin Flow framework.