Walaa Eldin Moustafa is a Staff Software Engineer at LinkedIn, where he works on building big data infrastructure and solutions for enabling unified and performant data processing systems across different compute engines and language APIs. Walaa holds a PhD degree in Computer Science from the University of Maryland at College Park. He has co-authored a number of database publications at various database conferences including SIGMOD, ICDE, and IEEE Big Data in topics that focus on modern applications of relational and deductive database management systems, such as graph query processing, machine learning, data integration, and probabilistic databases.