Worked on the ChilliCream/graphql-platform repository to enhance backend reliability and data handling in a GraphQL environment. Addressed a bug in the introspection schema by correcting the exposure of directive arguments, ensuring that introspection queries now accurately reflect schema definitions and aligning related tests. Introduced new functionality in the Fusion Execution Engine to support parsing and representing JSON arrays within list-based requirements, improving validation for complex data structures. Leveraged C# and expertise in API and backend development to deliver these changes with a focus on test-driven quality, clear documentation, and a stable, low-risk rollout process for client teams.