Navneev contributed to backend reliability and feature enablement in both the apache/lucene and facebookresearch/faiss repositories during February 2025. He addressed a flaky KNN vector test in Lucene by refining assertion logic, which improved continuous integration stability and production reliability for vector search queries. In FAISS, he extended the GpuIndexCagra component by integrating IndexIDMap support, allowing vectors to be stored and retrieved with associated IDs and enabling ID-based indexing workflows on GPU. His work involved C++, Java, and GPU programming, demonstrating depth in index management and testing while directly resolving user-reported issues and enhancing production-impactful functionality.