Viraj Thakur contributed to the facebook/rocksdb repository by developing two core features focused on observability and operational control within the storage stack. He implemented end-to-end request ID traceability, enabling propagation of request identifiers from the application layer through RocksDB to the filesystem, which improved debugging and log visibility. Using C++ and leveraging file system and unit testing expertise, he added IODebugContext to enhance read-path diagnostics. Additionally, Viraj introduced user-controlled manual compaction cancellation by integrating an atomic boolean into CompactionOptions, allowing responsive cancellation of ongoing CompactFiles operations. His work demonstrated depth in C++ development and database management.