In the summer of 2017, Nina Jankowicz, a twenty-eight-year-old American, was working in Kyiv as a communications adviser to Ukraine’s foreign ministry as part of a yearlong Fulbright fellowship.

Implementation of a cache-efficient, multithreaded, lock-free, hash-based join pipeline utilizing a memory-efficient hash table optimized for joins. This project was created for the SIGMOD 2025 ...