Walaa Moustafa
Senior Staff Software Engineer at LinkedIn
San Francisco Bay Area United States
Summary
🤩
Rockstar🎓
Top SchoolWalaa Moustafa is a Senior Staff Software Engineer in the San Francisco Bay Area with 11 years of experience building distributed, declarative database engines that power AI, ML, analytics, and graph processing. He combines deep academic roots from a PhD in computer science with hands-on system design, specializing in query optimization, distributed evaluation, parallelization, and data partitioning for large-scale workloads. At LinkedIn he re-architected core data access and helped build a realtime distributed graph engine for the Economic Graph serving 500M+ members, and has contributed backend improvements to the well-regarded coral SQL translation and rewrite engine. His work spans both theory and production: from recursive query evaluation models on MapReduce/BSP to pragmatic SQL/UDF intermediate representations that enable cross-platform execution. Walaa focuses on simplifying Big Data management and boosting data science productivity through expressive, performant APIs and languages. He is as comfortable proving algorithmic properties as he is shipping resilient, fleet-scale services.
11 years of coding experience
18 years of employment as a software developer
Bachelor of Science (BSc), Computer Science, Bachelor of Science (BSc), Computer Science at Alexandria UniversityThe University of Maryland, College Park
Github Skills (8)
apache-calcite10
javas10
hive10
presto10
sql10
java10
calc10
udf9
Programming languages (4)
Github contributions (5)
linkedin/coral
Sep 2019 - Jun 2022
Coral is a translation, analysis, and query rewrite engine for SQL and other relational languages.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:29 releases, 411 reviews, 24 commits in 2 years 9 months
Contributions summary:Walaa primarily focused on enhancing the `coral` translation and query rewrite engine. Their contributions include implementing the `shouldConvertRaggedUnionTypesToVarying()` method, converting Hive subscript operators to Presto's `element_at` function, and adjusting the behavior of versioned UDFs. The user also introduced changes to support switched forms of CASE functions.
queryrelationalcoralflink-sqltranslation
wmoustafa/coral
Nov 2020 - Nov 2023
Coral is a translation, analysis, and query rewrite engine for SQL and other relational languages.
Contributions:58 pushes, 23 branches in 2 years 11 months
queryrelationalcoralflink-sqlsqlserver
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