During November 2024, David Basoko focused on backend development and database integration within the deepset-ai/haystack-core-integrations repository. He addressed a critical bug in Astra embedding retrieval by ensuring the top-k parameter correctly limited the number of results returned, directly improving retrieval accuracy for Astra-powered searches. David implemented the fix using Python and reinforced reliability by adding an integration test that validates top-k behavior, providing regression protection for future updates. His work demonstrated strong testing discipline and CI readiness, with clear documentation for traceability. This targeted engineering effort enhanced the robustness and trustworthiness of document store integrations in production environments.