Cem Cayiroglu
Staff Software Engineer at Meta
Greater Seattle Area United States
Summary
🤩
Rockstar🎓
Top SchoolCem Cayiroglu is a Staff Software Engineer in the Greater Seattle area with 9 years of experience building large-scale storage and data infrastructure. He currently works on Ads Infrastructure at Meta and previously drove storage systems, Presto and Spark data-warehouse metadata efficiency efforts at scale. An active contributor to the Presto project, he has improved core engine memory efficiency by eliminating redundant byte-array allocations and added administrative query-preemption capabilities, reflecting deep expertise in performance and operational control. His early career in telecoms and OSS stacks focused on Java, Cassandra, ETL and OLAP systems, giving him strong end-to-end systems grounding. He alternates between IC and engineering-manager responsibilities, blending hands-on low-level optimization with team leadership and operational impact.
10 years of coding experience
14 years of employment as a software developer
Istanbul Technical University
English, Turkish
Github Skills (22)
query-optimization10
big-data10
java10
javas10
sql10
performance-tuning10
presto10
data-set9
data-model9
distributed-systems9
databases9
distributed-system9
user-data9
database9
data-structures8
Programming languages (1)
Github contributions (5)
prestodb/presto
Oct 2018 - Nov 2020
The official home of the Presto distributed SQL query engine for big data
Role in this project:
Back-end Developer
Back-end DeveloperContributions:18 reviews, 22 commits, 49 PRs in 2 years 1 month
Contributions summary:Cem primarily focused on optimizing the Presto query engine by removing redundant byte array allocations within the core data structures and block builders. These optimizations improved the efficiency of memory usage within the engine. Furthermore, the user added a new error code and functionality to administratively preempt queries, enhancing control and management capabilities. The commits also included supporting multiple conventions in PolymorphicScalarFunction and adding smoke tests for afterburner support.
distributed-sqlquerybigdataquery-enginesql
cemcayiroglu/presto
Oct 2018 - Mar 2021
Distributed SQL query engine for big data
Contributions:183 pushes, 35 branches in 2 years 5 months
queryquery-enginenosqlmysqlsql
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