During this period, contributed a performance-focused feature to the electric-sql/electric repository, enhancing the Sync Service with a quick shape hash validation mechanism. Leveraging Elixir and backend development expertise, implemented hash-based pre-validation to bypass costly shape-defining lookups when a shape handle is provided, only performing full validation if the hash check fails. This approach reduced latency and CPU usage, directly improving responsiveness under high request throughput. The work addressed specific issues in shape resolution, aligning with business goals for scalability. The solution demonstrated a deep understanding of API development and efficient backend design, laying groundwork for future enhancements.